1. Organic thermoelectric device utilizing charge transfer interface as the charge generation by harvesting thermal energy

Shun Kondo, Mana Kameyama, Kentaro Imaoka, Yoko Shimoi, Fabrice Mathevet, Takashi Fujihara, Hiroshi Goto, Hajime Nakanotani, Masayuki Yahiro, Chihaya Adachi

Nature Communications, 15(1), 8115, (2024)

DOI:10.1038/s41467-024-52047-5

2. Simultaneous control of carrier transport and film polarization of emission layers aimed at high-performance OLEDs

Masaki Tanaka, Chin-Yiu Chan, Hajime Nakanotani, Chihaya Adachi

Nature Communications, 15(1), 5950, (2024)

DOI:10.1038/s41467-024-50326-9

3. Hexacarbazolylbenzene: An Excellent Host Molecule Causing Strong Guest Molecular Orientation and the High‐Performance OLEDs

Bhagya Madushani, Masashi Mamada, Kenichi Goushi, Hiroshi Katagiri, Hajime Nakanotani, Takuji Hatakeyama, Chihaya Adachi

Advanced Materials, 36(30), 2402275, (2024)

DOI:10.1002/adma.202402275

4. Unexplored Exciplex Formation by Dual Excitation of Donor and Acceptor Layers Optically and Electrically

Tharindu P. B. Rajakaruna, Xun Tang, Hajime Nakanotani, Chihaya Adachi

Advanced Optical Materials, 12(28), 2401237, (2024)

DOI:10.1002/adom.202401237

5. Spacer dependence of exciplex dynamics in donor/spacer/acceptor layers

Tharindu P.B. Rajakaruna, Xun Tang, Hajime Nakanotani, Chihaya Adachi

Chemical Physics Letters, 848(24), 141390, (2024)

DOI:10.1016/j.cplett.2024.141390

6. Impact of Spontaneous Orientational Polarization on Triplet–Triplet Upconversion-Based Blue Organic Light-Emitting Diodes

Shunta Kakumachi, Hajime Nakanotani, Yuto Nagasaki, Chihaya Adachi

ACS Applied Materials & Interfaces, 16(24), 31392-31398, (2024)

DOI:10.1021/acsami.4c02821

7. Efficient Near‐Infrared Fluorescence in Deuterated Host–Guest System for Near‐Infrared Organic Light‐Emitting Diodes

Qun Yu, Yuika Tamura, Hajime Nakanotani, Masashi Mamada, Chihaya Adachi

Advanced Optical Materials, 12(21), 2400932, (2024)

DOI:10.1002/adom.202400932

8. Suppressed Gold Penetration with the Molybdenum Oxide Interlayer to Increase Power Conversion Efficiency of Perovskite Solar Cells

Badamgarav Purev‐Ochir, Jun Tae Song, Pangpang Wang, Masayuki Yahiro, Sunao Yamada, Hajime Nakanotani, Toshinori Matsushima, Chihaya Adachi

Solar RRL, 8(8), 2400029, (2024)

DOI:10.1002/solr.202400029

9. Three-dimensional sensing of surfaces by projection of invisible electroluminescence from organic light-emitting diodes

Nishiki Yamada, Hajime Nakanotani, Akitsuna Takagi, Masashi Mamada, Umamahesh Balijapalli, Tatsuya Ichikawa, Eiji Hirata, Shun Kaizu, Akira Tanaka, Kazuichiro Itonaga, Chihaya Adachi

Science Advances, 10(1), eadj6583, (2024)

DOI:10.1126/sciadv.adj6583

10. The role of spontaneous orientation polarization on charge storage behavior at an interface between organic semiconductor layers

Takahiko Yamanaka, Hajime Nakanotani, Chihaya Adachi

Journal of Materials Chemistry C, 12(3), 1055-1060, (2024)

DOI:10.1039/d3tc03979j

11. A polar transition of spontaneous orientation polarization in organic amorphous thin films

Yuuhi Ueda, Masaki Tanaka, Hajime Nakanotani, Chihaya Adachi

Chemical Physics Letters, 833(44), 140915, (2023)

DOI:10.1016/j.cplett.2023.140915

12. Anti‐Stokes Luminescence in Multi‐Resonance‐Type Thermally‐Activated Delayed Fluorescence Molecules

Shintaro Kohata, Hajime Nakanotani, Youhei Chitose, Takuma Yasuda, Youichi Tsuchiya, Chihaya Adachi

Angewandte Chemie International Edition, 62(44), e202312326, (2023)

DOI:10.1002/anie.202312326

13. Abrupt exciton quenching in blue fluorescent organic light-emitting diodes around turn-on voltage region

Shunta Kakumachi, Thanh Ba Nguyen, Hajime Nakanotani, Chihaya Adachi

Chemical Engineering Journal, 471(1), 144516, (2023)

DOI:10.1016/j.cej.2023.144516

14. Multiple donor–acceptor design for highly luminescent and stable thermally activated delayed fluorescence emitters

Bhagya Madushani, Masashi Mamada, Kenichi Goushi, Thanh Ba Nguyen, Hajime Nakanotani, Hironori Kaji, Chihaya Adachi

Scientific Reports, 13(1), 7644, (2023)

DOI:10.1038/s41598-023-34623-9

15. Enhancing Triplet–Triplet Upconversion Efficiency and Operational Lifetime in Blue Organic Light-Emitting Diodes by Utilizing Thermally Activated Delayed Fluorescence Materials

Thanh B. Nguyen, Hajime Nakanotani, Chin-Yiu Chan, Shunta Kakumachi, Chihaya Adachi

ACS Applied Materials & Interfaces, 15(19), 23557-23563, (2023)

DOI:10.1021/acsami.3c02855

16. Post-Modification of Pyrrolopyrrole Aza-BODIPY toward High Near-Infrared Fluorescence Brightness

Yitong Wang, Shigeki Mori, Hajime Nakanotani, Chihaya Adachi, Soji Shimizu

Organic Letters, 25(17), 3040-3044, (2023)

DOI:10.1021/acs.orglett.3c00848

17. Electron Lifetime of Over One Month in Disordered Organic Solid‐State Films

Takahiko Yamanaka, Hajime Nakanotani, Katsuhiro Nakamoto, Chihaya Adachi

Advanced Materials, 35(11), 2210335, (2023)

DOI:10.1002/adma.202210335

18. A very low lasing threshold of DABNA derivatives with DFB structures

Masashi Mamada, Satoshi Maedera, Susumu Oda, Thanh Ba Nguyen, Hajime Nakanotani, Takuji Hatakeyama, Chihaya Adachi

Materials Chemistry Frontiers, 7(2), 259-266, (2023)

DOI:10.1039/d2qm01040b

19. Solvent-dependent dual emission processes in charge-transfer excited states of phenothiazine-triphenyltriazine conformers

Tomohiro Ryu, Kiyoshi Miyata, Masaki Saigo, Yuushi Shimoda, Youichi Tsuchiya, Hajime Nakanotani, Chihaya Adachi, Ken Onda

Chemical Physics Letters, 809(10), 140155, (2022)

DOI:10.1016/j.cplett.2022.140155

20. Multiple resonance type thermally activated delayed fluorescence by dibenzo [1,4] azaborine derivatives

Jaehyun Bae, Mika Sakai, Youichi Tsuchiya, Naoki Ando, Xian-Kai Chen, Thanh Ba Nguyen, Chin-Yiu Chan, Yi-Ting Lee, Morgan Auffray, Hajime Nakanotani, Shigehiro Yamaguchi, Chihaya Adachi

Frontiers in Chemistry, 10(10), 990918, (2022)

DOI:10.3389/fchem.2022.990918

21. Modulation of Intersystem Crossing Rate Induced by Singlet-triplet Energy Level Alignment in 1,2,3,5-Tetrakis(carbazol-9-yl)-4,6-dicyanobenzene Single Crystals

Shintaro Kohata, Hajime Nakanotani, Chihaya Adachi

Chemistry Letters, 51(10), 989-992, (2022)

DOI:10.1246/cl.220304

22. Carbazole-2-carbonitrile as an acceptor in deep-blue thermally activated delayed fluorescence emitters for narrowing charge-transfer emissions

Chin-Yiu Chan, Yi-Ting Lee, Masashi Mamada, Kenichi Goushi, Youichi Tsuchiya, Hajime Nakanotani, Chihaya Adachi

Chemical Science, 13(26), 7821-7828, (2022)

DOI:10.1039/d2sc02478k

23. An Overlooked Charge‐Transfer Interaction in the Interfacial Triplet–Triplet Upconversion Process in Blue Organic Light‐Emitting Diodes

Thanh Ba Nguyen, Hajime Nakanotani, Chihaya Adachi

Advanced Optical Materials, 10(18), 2200704, (2022)

DOI:10.1002/adom.202200704

24. Highly Efficient Deep‐Blue Organic Light‐Emitting Diodes Based on Rational Molecular Design and Device Engineering

Masashi Mamada, Hiroshi Katagiri, Chin‐Yiu Chan, Yi‐Ting Lee, Kenichi Goushi, Hajime Nakanotani, Takuji Hatakeyama, Chihaya Adachi

Advanced Functional Materials, 32(32), 2204352, (2022)

DOI:10.1002/adfm.202204352

25. Tailor‐Made Multi‐Resonance Terminal Emitters toward Narrowband, High‐Efficiency, and Stable Hyperfluorescence Organic Light‐Emitting Diodes

Yi‐Ting Lee, Chin‐Yiu Chan, Masaki Tanaka, Masashi Mamada, Kenichi Goushi, Xun Tang, Youichi Tsuchiya, Hajime Nakanotani, Chihaya Adachi

Advanced Optical Materials, 10(17), 2200682, (2022)

DOI:10.1002/adom.202200682

26. Spontaneous formation of metastable orientation with well-organized permanent dipole moment in organic glassy films

Masaki Tanaka, Morgan Auffray, Hajime Nakanotani, Chihaya Adachi

Nature Materials, 21(7), 819-825, (2022)

DOI:10.1038/s41563-022-01265-7

27. Significant role of spin-triplet state for exciton dissociation in organic solids

Takahiko Yamanaka, Hajime Nakanotani, Chihaya Adachi

Science Advances, 8(9), eabj9188, (2022)

DOI:10.1126/sciadv.abj9188

28. Efficiency of Thermally Activated Delayed Fluorescence Sensitized Triplet Upconversion Doubled in Three‐Component System

Brett Yurash, Alana Dixon, Carolina Espinoza, Alexander Mikhailovsky, Sangmin Chae, Hajime Nakanotani, Chihaya Adachi, Thuc‐Quyen Nguyen

Advanced Materials, 34(5), 2103976, (2022)

DOI:10.1002/adma.202103976

29. 2,6‐Dicarbonitrile Diphenyl‐1λ‐Phosphinine (DCNP)—A Robust Conjugated Building Block for Multi‐Functional Dyes Exhibiting Tunable Amplified Spontaneous Emission

Umamahesh Balijapalli, Xun Tang, Daichi Okada, Yi‐Ting Lee, Buddhika S. B. Karunathilaka, Morgan Auffray, Ganbaatar Tumen‐Ulzii, Youichi Tsuchiya, Atula S. D. Sandanayaka, Toshinori Matsushima, Hajime Nakanotani, Chihaya Adachi

Advanced Optical Materials, 9(21), 2101122, (2021)

DOI:10.1002/adom.202101122

30. Tetrabenzo[[a,b]phenazine Backbone for Highly Efficient Orange–Red Thermally Activated Delayed Fluorescence with Completely Horizontal Molecular Orientation

Umamahesh Balijapalli, Yi‐Ting Lee, Buddhika S. B. Karunathilaka, Ganbaatar Tumen‐Ulzii, Morgan Auffray, Youichi Tsuchiya, Hajime Nakanotani, Chihaya Adachi

Angewandte Chemie International Edition, 60(35), 19364-19373, (2021)

DOI:10.1002/anie.202106570

31. Direct Observation of Photoexcited Electron Dynamics in Organic Solids Exhibiting Thermally Activated Delayed Fluorescence via Time‐Resolved Photoelectron Emission Microscopy

Yusuke Fukami, Masato Iwasawa, Masahiro Sasaki, Takuya Hosokai, Hajime Nakanotani, Chihaya Adachi, Keiki Fukumoto, Yoichi Yamada

Advanced Optical Materials, 9(19), 2100619, (2021)

DOI:10.1002/adom.202100619

32. Amplified spontaneous emission from oligo(p-phenylenevinylene) derivatives

Masashi Mamada, Hajime Nakanotani, Chihaya Adachi

Materials Advances, 2(12), 3906-3914, (2021)

DOI:10.1039/d0ma00756k

33. Thermally Activated Delayed Fluorescence Properties of Trioxoazatriangulene Derivatives Modified with Electron Donating Groups

Youichi Tsuchiya, Yuma Ishikawa, Sang‐Hoon Lee, Xian‐Kai Chen, Jean‐Luc Brédas, Hajime Nakanotani, Chihaya Adachi

Advanced Optical Materials, 9(14), 2002174, (2021)

DOI:10.1002/adom.202002174

34. Investigating HOMO Energy Levels of Terminal Emitters for Realizing High‐Brightness and Stable TADF‐Assisted Fluorescence Organic Light‐Emitting Diodes

Yi‐Ting Lee, Chin‐Yiu Chan, Masaki Tanaka, Masashi Mamada, Umamahesh Balijapalli, Youichi Tsuchiya, Hajime Nakanotani, Takuji Hatakeyama, Chihaya Adachi

Advanced Electronic Materials, 7(4), 2001090, (2021)

DOI:10.1002/aelm.202001090

35. Thermally-activated Delayed Fluorescence for Light-emitting Devices

Hajime Nakanotani, Youichi Tsuchiya, Chihaya Adachi

Chemistry Letters, 50(5), 938-948, (2021)

DOI:10.1246/cl.200915

36. Isotope Effect of Host Material on Device Stability of Thermally Activated Delayed Fluorescence Organic Light‐Emitting Diodes

Xuelong Liu, Chin-Yiu Chan, Fabrice Mathevet, Masashi Mamada, Youichi Tsuchiya, Yi-Ting Lee, Hajime Nakanotani, Shinichiro Kobayashi, Masayuki Shiochi, Chihaya Adachi

Small Science, 1(4), 2000057, (2021)

DOI:10.1002/smsc.202000057

37. Highly Efficient Near‐Infrared Electrofluorescence from a Thermally Activated Delayed Fluorescence Molecule

Umamahesh Balijapalli, Ryo Nagata, Nishiki Yamada, Hajime Nakanotani, Masaki Tanaka, Anthony D'Aléo, Virginie Placide, Masashi Mamada, Youichi Tsuchiya, Chihaya Adachi

Angewandte Chemie International Edition, 60(15), 8477-8482, (2021)

DOI:10.1002/anie.202016089

38. Stable pure-blue hyperfluorescence organic light-emitting diodes with high-efficiency and narrow emission

Chin-Yiu Chan, Masaki Tanaka, Yi-Ting Lee, Yiu-Wing Wong, Hajime Nakanotani, Takuji Hatakeyama, Chihaya Adachi

Nature Photonics, 15(3), 203-207, (2021)

DOI:10.1038/s41566-020-00745-z

39. H2O-Induced Crystallization of Organic Luminescent Thin Films by Direct Film Storage in a High Vacuum

Takuya Hosokai, Taiyo Nakanishi, Akinori Honda, Kouki Akaike, Ryohei Tsuruta, Hiroshi Itoh, Hajime Nakanotani, Yasuo Nakayama

The Journal of Physical Chemistry C, 124(45), 24919-24929, (2020)

DOI:10.1021/acs.jpcc.0c08968

40. Precise Exciton Management of Quaternary Emission Layers for Highly Stable Organic Light-Emitting Diodes Based on Thermally Activated Delayed Fluorescence

Masaki Tanaka, Ryo Nagata, Hajime Nakanotani, Chihaya Adachi

ACS Applied Materials & Interfaces, 12(45), 50668-50674, (2020)

DOI:10.1021/acsami.0c15208

41. Role of Spontaneous Orientational Polarization in Organic Donor–Acceptor Blends for Exciton Binding

Yuuhi Ueda, Hajime Nakanotani, Takuya Hosokai, Yuya Tanaka, Hokuto Hamada, Hisao Ishii, Shuhei Santo, Chihaya Adachi

Advanced Optical Materials, 8(21), 2000896, (2020)

DOI:10.1002/adom.202000896

42. Fast spin-flip enables efficient and stable organic electroluminescence from charge-transfer states

Lin-Song Cui, Alexander J. Gillett, Shou-Feng Zhang, Hao Ye, Yuan Liu, Xian-Kai Chen, Ze-Sen Lin, Emrys W. Evans, William K. Myers, Tanya K. Ronson, Hajime Nakanotani, Sebastian Reineke, Jean-Luc Bredas, Chihaya Adachi, Richard H. Friend

Nature Photonics, 14(10), 636-642, (2020)

DOI:10.1038/s41566-020-0668-z

43. Molecular Design Based on Donor-Weak Donor Scaffold for Blue Thermally-Activated Delayed Fluorescence Designed by Combinatorial DFT Calculations

Youichi Tsuchiya, Keita Tsuji, Ko Inada, Fatima Bencheikh, Yan Geng, H. Shaun Kwak, Thomas J. L. Mustard, Mathew D. Halls, Hajime Nakanotani, Chihaya Adachi

Frontiers in Chemistry, 8(1), 403, (2020)

DOI:10.3389/fchem.2020.00403

44. Understanding degradation of organic light-emitting diodes from magnetic field effects

Masaki Tanaka, Ryo Nagata, Hajime Nakanotani, Chihaya Adachi

Communications Materials, 1(1), 18, (2020)

DOI:10.1038/s43246-020-0019-0

45. Nanosecond-time-scale delayed fluorescence molecule for deep-blue OLEDs with small efficiency rolloff

Jong Uk Kim, In Seob Park, Chin-Yiu Chan, Masaki Tanaka, Youichi Tsuchiya, Hajime Nakanotani, Chihaya Adachi

Nature Communications, 11(1), 1765, (2020)

DOI:10.1038/s41467-020-15558-5

46. Utilization of Multi-Heterodonors in Thermally Activated Delayed Fluorescence Molecules and Their High Performance Bluish-Green Organic Light-Emitting Diodes

Umamahesh Balijapalli, Masaki Tanaka, Morgan Auffray, Chin-Yiu Chan, Yi-Ting Lee, Youichi Tsuchiya, Hajime Nakanotani, Chihaya Adachi

ACS Applied Materials & Interfaces, 12(8), 9498-9506, (2020)

DOI:10.1021/acsami.9b20020

47. Observation of Nonradiative Deactivation Behavior from Singlet and Triplet States of Thermally Activated Delayed Fluorescence Emitters in Solution

Naoto Notsuka, Hajime Nakanotani, Hiroki Noda, Kenichi Goushi, Chihaya Adachi

The Journal of Physical Chemistry Letters, 11(2), 562-566, (2020)

DOI:10.1021/acs.jpclett.9b03302

48. Molecular orientation of disk-shaped small molecules exhibiting thermally activated delayed fluorescence in host–guest films

Masaki Tanaka, Hiroki Noda, Hajime Nakanotani, Chihaya Adachi

Applied Physics Letters, 116(2), 023302, (2020)

DOI:10.1063/1.5140210

49. The Role of Reverse Intersystem Crossing Using a TADF‐Type Acceptor Molecule on the Device Stability of Exciplex‐Based Organic Light‐Emitting Diodes

Thanh Ba Nguyen, Hajime Nakanotani, Takuji Hatakeyama, Chihaya Adachi

Advanced Materials, 32(9), 1906614, (2020)

DOI:10.1002/adma.201906614

50. Slow recombination of spontaneously dissociated organic fluorophore excitons

Takahiko Yamanaka, Hajime Nakanotani, Chihaya Adachi

Nature Communications, 10(1), 5748, (2019)

DOI:10.1038/s41467-019-13736-8

51. High-triplet-energy Bipolar Host Materials Based on Phosphine Oxide Derivatives for Efficient Sky-blue Thermally Activated Delayed Fluorescence Organic Light-emitting Diodes with Reduced Roll-off

Jong Uk Kim, Michael Y. Wong, Shiv Kumar, Oliver G. Hayes, Finlay Duncan, Chin-Yiu Chan, Ben Yiu-Wing Wong, Hao Ye, Lin-Song Cui, Hajime Nakanotani, Eli Zysman-Colman, Chihaya Adachi

Chemistry Letters, 48(10), 1225-1228, (2019)

DOI:10.1246/cl.190412

52. Critical role of intermediate electronic states for spin-flip processes in charge-transfer-type organic molecules with multiple donors and acceptors

Hiroki Noda, Xian-Kai Chen, Hajime Nakanotani, Takuya Hosokai, Momoka Miyajima, Naoto Notsuka, Yuuki Kashima, Jean-Luc Brédas, Chihaya Adachi

Nature Materials, 18(10), 1084-1090, (2019)

DOI:10.1038/s41563-019-0465-6

53. Suppression of Structural Change upon S1–T1 Conversion Assists the Thermally Activated Delayed Fluorescence Process in Carbazole-Benzonitrile Derivatives

Masaki Saigo, Kiyoshi Miyata, Sei’ichi Tanaka, Hajime Nakanotani, Chihaya Adachi, Ken Onda

The Journal of Physical Chemistry Letters, 10(10), 2475-2480, (2019)

DOI:10.1021/acs.jpclett.9b00810

54. TADF activation by solvent freezing: The role of nonradiative triplet decay and spin-orbit coupling in carbazole benzonitrile derivatives

T. Hosokai, Hajime Nakanotani, S. Santou, H. Noda, Y. Nakayama, C. Adachi

Synthetic Metals, 252(21), 62-68, (2019)

DOI:10.1016/j.synthmet.2019.04.005

55. Photoluminescence Quenching Probes Spin Conversion and Exciton Dynamics in Thermally Activated Delayed Fluorescence Materials

Brett Yurash, Hajime Nakanotani, Yoann Olivier, David Beljonne, Chihaya Adachi, Thuc‐Quyen Nguyen

Advanced Materials, 31(21), 1804490, (2019)

DOI:10.1002/adma.201804490

56. Photostable and highly emissive glassy organic dots exhibiting thermally activated delayed fluorescence

Youichi Tsuchiya, Koudai Ikesue, Hajime Nakanotani, Chihaya Adachi

Chemical Communications, 55(36), 5215-5218, (2019)

DOI:10.1039/c9cc01420a

57. Effect of Carrier Balance on Device Degradation of Organic Light‐Emitting Diodes Based on Thermally Activated Delayed Fluorescence Emitters

Masaki Tanaka, Hiroki Noda, Hajime Nakanotani, Chihaya Adachi

Advanced Electronic Materials, 5(5), 1800708, (2019)

DOI:10.1002/aelm.201800708

58. Highly Efficient Thermally Activated Delayed Fluorescence with Slow Reverse Intersystem Crossing

Hiroki Noda, Hajime Nakanotani, Chihaya Adachi

Chemistry Letters, 48(2), 126-129, (2019)

DOI:10.1246/cl.180813

59. Efficient and stable sky-blue delayed fluorescence organic light-emitting diodes with CIEy below 0.4

Chin-Yiu Chan, Masaki Tanaka, Hajime Nakanotani, Chihaya Adachi

Nature Communications, 9(1), 5036, (2018)

DOI:10.1038/s41467-018-07482-6

60. The Importance of Excited‐State Energy Alignment for Efficient Exciplex Systems Based on a Study of Phenylpyridinato Boron Derivatives

Masashi Mamada, Guojian Tian, Hajime Nakanotani, Jianhua Su, Chihaya Adachi

Angewandte Chemie, 130(38), 12560-12564, (2018)

DOI:10.1002/ange.201804218

61. Trifluoromethane modification of thermally activated delayed fluorescence molecules for high-efficiency blue organic light-emitting diodes

Masayuki Yokoyama, Ko Inada, Youichi Tsuchiya, Hajime Nakanotani, Chihaya Adachi

Chemical Communications, 54(59), 8261-8264, (2018)

DOI:10.1039/c8cc03425g

62. Excited state engineering for efficient reverse intersystem crossing

Hiroki Noda, Hajime Nakanotani, Chihaya Adachi

Science Advances, 4(6), eaao6910, (2018)

DOI:10.1126/sciadv.aao6910

63. Exploiting Singlet Fission in Organic Light‐Emitting Diodes

Ryo Nagata, Hajime Nakanotani, William J. Potscavage, Chihaya Adachi

Advanced Materials, 30(33), 1801484, (2018)

DOI:10.1002/adma.201801484

64. Well-Ordered 4CzIPN ((4s,6s)-2,4,5,6-Tetra(9-H-carbazol-9-yl)isophthalonitrile) Layers: Molecular Orientation, Electronic Structure, and Angular Distribution of Photoluminescence

Y. Hasegawa, Y. Yamada, M. Sasaki, T. Hosokai, Hajime Nakanotani, C. Adachi

The Journal of Physical Chemistry Letters, 9(4), 863-867, (2018)

DOI:10.1021/acs.jpclett.7b03232

65. Well-ordered films of disk-shaped thermally activated delayed fluorescence molecules

Y. Hasegawa, Y. Yamada, M. Sasaki, T. Hosokai, Hajime Nakanotani, C. Adach

Journal of Photonics for Energy, 8(03), 1, (2018)

DOI:10.1117/1.jpe.8.032110

66. Solvent-dependent investigation of carbazole benzonitrile derivatives: does the LE3−CT1 energy gap facilitate thermally activated delayed fluorescence?

Takuya Hosokai, Hiroki Noda, Hajime Nakanotani Takanori Nawata, Yasuo Nakayama, Hiroyuki Matsuzaki, Chihaya Adachi

Journal of Photonics for Energy, 8(03), 1, (2018)

DOI:10.1117/1.jpe.8.032102

67. Rational Molecular Design for Deep‐Blue Thermally Activated Delayed Fluorescence Emitters

Chin‐Yiu Chan, Lin‐Song Cui, Jong Uk Kim, Hajime Nakanotani, Chihaya Adachi

Advanced Functional Materials, 28(11), 1706023, (2018)

DOI:10.1002/adfm.201706023

68. Long-lived efficient delayed fluorescence organic light-emitting diodes using n-type hosts

Lin-Song Cui, Shi-Bin Ruan, Fatima Bencheikh, Ryo Nagata, Lei Zhang, Ko Inada, Hajime Nakanotani, Liang-Sheng Liao, Chihaya Adachi

Nature Communications, 8(1), 2250, (2017)

DOI:10.1038/s41467-017-02419-x

69. Donor–σ–Acceptor Motifs: Thermally Activated Delayed Fluorescence Emitters with Dual Upconversion

Yan Geng, Anthony D'Aleo, Ko Inada, Lin‐Song Cui, Jong Uk Kim, Hajime Nakanotani, Chihaya Adachi

Angewandte Chemie International Edition, 56(52), 16536-16540, (2017)

DOI:10.1002/anie.201708876

70. Molecular Design for Blue Thermal Activated Delayed Fluorescence Materials: Substitution Position Effect

Yan Geng, Lin-Song Cui, Jong Uk Kim, Hajime Nakanotani, Chihaya Adachi

Chemistry Letters, 46(10), 1490-1492, (2017)

DOI:10.1246/cl.170587

71. Highly Efficient Thermally Activated Delayed Fluorescence from an Excited-State Intramolecular Proton Transfer System

Masashi Mamada, Ko Inada, Takeshi Komino, William J. Potscavage, Hajime Nakanotani, Chihaya Adachi

ACS Central Science, 3(7), 769-777, (2017)

DOI:10.1021/acscentsci.7b00183

72. Thermally activated delayed fluorescence of Bis(9,9-dimethyl-9,10-dihydroacridine) dibenzo[b,d]thiophene 5,5-dioxide derivatives for organic light-emitting diodes

Jong Uk Kim, Saripally Sudhaker Reddy, Lin-Song Cui, Hiroko Nomura, Sunbin Hwang, Dae Hyeon Kim, Hajime Nakanotani, Sung–Ho Jin, Chihaya Adachi

Journal of Luminescence, 190(7), 485-491, (2017)

DOI:10.1016/j.jlumin.2017.06.006

73. Near-infrared organic light-emitting diodes for biosensing with high operating stability

Takahiko Yamanaka, Hajime Nakanotani, Shigeo Hara, Toru Hirohata, Chihaya Adachi

Applied Physics Express, 10(7), 074101, (2017)

DOI:10.7567/apex.10.074101

74. Light Amplification in Molecules Exhibiting Thermally Activated Delayed Fluorescence

Hajime Nakanotani, Taro Furukawa, Takuya Hosokai, Takuji Hatakeyama, Chihaya Adachi

Advanced Optical Materials, 5(12), 1700051, (2017)

DOI:10.1002/adom.201700051

75. Evidence and mechanism of efficient thermally activated delayed fluorescence promoted by delocalized excited states

Takuya Hosokai, Hiroyuki Matsuzaki, Hajime Nakanotani, Katsumi Tokumaru, Tetsuo Tsutsui, Akihiro Furube, Keirou Nasu, Hiroko Nomura, Masayuki Yahiro, Chihaya Adachi

Science Advances, 3(5), e1603282, (2017)

DOI:10.1126/sciadv.1603282

76. Controlling Singlet–Triplet Energy Splitting for Deep‐Blue Thermally Activated Delayed Fluorescence Emitters

Lin‐Song Cui, Hiroko Nomura, Yan Geng, Jong Uk Kim, Hajime Nakanotani, Chihaya Adachi

Angewandte Chemie International Edition, 56(6), 1571-1575, (2017)

DOI:10.1002/anie.201609459

77. Application of wide-energy-gap material 3,4-di(9H-carbazol-9-yl) benzonitrile in organic light-emitting diodes

Yuya Tanaka, Takehiro Takahashi, Junichi Nishide, Yasuhide Hiraga, Hajime Nakanotani, Chihaya Adachi

Thin Solid Films, 619(5), 120-124, (2016)

DOI:10.1016/j.tsf.2016.11.016

78. Near‐Infrared Electrophosphorescence up to 1.1 µm using a Thermally Activated Delayed Fluorescence Molecule as Triplet Sensitizer

Ryo Nagata, Hajime Nakanotani, Chihaya Adachi

Advanced Materials, 29(5), 1604265, (2017)

DOI:10.1002/adma.201604265

79. Boron Difluoride Complexes of Expanded N‐Confused Calix[n]phyrins That Demonstrate Unique Luminescent and Lasing Properties

Masatoshi Ishida, Toshihiro Omagari, Ryuji Hirosawa, Keisuke Jono, Young Mo Sung, Yuhsuke Yasutake, Hidemitsu Uno, Motoki Toganoh, Hajime Nakanotani, Susumu Fukatsu, Dongho Kim, Hiroyuki Furuta

Angewandte Chemie International Edition, 55(39), 12045-12049, (2016)

DOI:10.1002/anie.201606246

80. Color Tuning of Avobenzone Boron Difluoride as an Emitter to Achieve Full‐Color Emission

Hin‐Wai Mo, Youichi Tsuchiya, Yan Geng, Takehiro Sagawa, Chika Kikuchi, Hajime Nakanotani, Fuyuki Ito, Chihaya Adachi

Advanced Functional Materials, 26(37), 6703-6710, (2016)

DOI:10.1002/adfm.201601257

81. Magnesium-gold binary alloy for organic light-emitting diodes with high corrosion resistance

Hiroya Arai, Hajime Nakanotani, Kei Morimoto, Chihaya Adachi

Journal of Vacuum Science & Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phenomena, 34(4), 040607, (2016)

DOI:10.1116/1.4952408

82. Thermally Activated Delayed Fluorescence from Pentacarbazorylbenzonitrile

Shuho Tanimoto, Takatsugu Suzuki, Hajime Nakanotani, Chihaya Adachi

Chemistry Letters, 45(7), 770-772, (2016)

DOI:10.1246/cl.160290

83. Benzimidazobenzothiazole‐Based Bipolar Hosts to Harvest Nearly All of the Excitons from Blue Delayed Fluorescence and Phosphorescent Organic Light‐Emitting Diodes

Lin‐Song Cui, Jong Uk Kim, Hiroko Nomura, Hajime Nakanotani, Chihaya Adachi

Angewandte Chemie International Edition, 55(24), 6864-6868, (2016)

DOI:10.1002/anie.201601136

84. Long-range coupling of electron-hole pairs in spatially separated organic donor-acceptor layers

Hajime Nakanotani, Taro Furukawa, Kei Morimoto, Chihaya Adachi

Science Advances, 2(2), e1501470, (2016)

DOI:10.1126/sciadv.1501470

85. Effect of Joule heating on transient current and electroluminescence in p-i-n organic light-emitting diodes under pulsed voltage operation

Kou Yoshida, Hajime Nakanotani, Chihaya Adachi

Organic Electronics, 31(15), 287-294, (2016)

DOI:10.1016/j.orgel.2016.01.039

86. Quantification of temperature rise in unipolar organic conductors during short voltage-pulse excitation using electrical testing methods

Kou Yoshida, Toshinori Matsushima, Hajime Nakanotani, Chihaya Adachi

Organic Electronics, 31(15), 191-197, (2016)

DOI:10.1016/j.orgel.2016.01.033

87. Low threshold amplified spontaneous emission and ambipolar charge transport in non-volatile liquid fluorene derivatives

Jean-Charles Ribierre, Li Zhao, Munetomo Inoue, Pierre-Olivier Schwartz, Ju-Hyung Kim, Kou Yoshida, Atula S. D. Sandanayaka, Hajime Nakanotani, Loic Mager, Stéphane Méry, Chihaya Adachi

Chemical Communications, 52(15), 3103-3106, (2016)

DOI:10.1039/c5cc08331a

88. Effect of reverse intersystem crossing rate to suppress efficiency roll-off in organic light-emitting diodes with thermally activated delayed fluorescence emitters

Munetomo Inoue, Tomas SereviĿius, Hajime Nakanotani, Kou Yoshida, Toshinori Matsushima, Saulius JuršĿnas, Chihaya Adachi

Chemical Physics Letters, 644(10), 62-67, (2016)

DOI:10.1016/j.cplett.2015.11.042

89. High-Efficiency Sky-Blue Organic Light-Emitting Diodes Utilizing Thermally-Activated Delayed Fluorescence

Yasuhide HIRAGA, Jun-ichi NISHIDE, Hajime Nakanotani, Masaki AONUMA, Chihaya ADACHI

IEICE Transactions on Electronics, E98.C(10), 971-976, (2015)

DOI:10.1587/transele.e98.c.971

90. Light Amplification in an Organic Solid‐State Film with the Aid of Triplet‐to‐Singlet Upconversion

Hajime Nakanotani, Taro Furukawa, Chihaya Adachi

Advanced Optical Materials, 3(10), 1381-1388, (2015)

DOI:10.1002/adom.201500236

91. Introduction of oxygen into organic thin films with the aim of suppressing singlet–triplet annihilation

Munetomo Inoue, Toshinori Matsushima, Hajime Nakanotani, Chihaya Adachi

Chemical Physics Letters, 624(9), 43-46, (2015)

DOI:10.1016/j.cplett.2015.02.010

92. Suppression of roll-off characteristics of organic light-emitting diodes by narrowing current injection/transport area to 50 nm

Kyohei Hayashi, Hajime Nakanotani, Munetomo Inoue, Kou Yoshida, Oleksandr Mikhnenko, Thuc-Quyen Nguyen, Chihaya Adachi

Applied Physics Letters, 106(9), 093301, (2015)

DOI:10.1063/1.4913461

93. Dual enhancement of electroluminescence efficiency and operational stability by rapid upconversion of triplet excitons in OLEDs

Taro Furukawa, Hajime Nakanotani, Munetomo Inoue, Chihaya Adachi

Scientific Reports, 5(1), 8429, (2015)

DOI:10.1038/srep08429

94. High‐Efficiency White Organic Light‐Emitting Diodes Based on a Blue Thermally Activated Delayed Fluorescent Emitter Combined with Green and Red Fluorescent Emitters

Takahiro Higuchi, Hajime Nakanotani, Chihaya Adachi

Advanced Materials, 27(12), 2019-2023, (2015)

DOI:10.1002/adma.201404967

95. Controlled emission colors and singlet–triplet energy gaps of dihydrophenazine-based thermally activated delayed fluorescence emitters

Jiyoung Lee, Katsuyuki Shizu, Hiroyuki Tanaka, Hajime Nakanotani, Takuma Yasuda, Hironori Kaji, Chihaya Adachi

Journal of Materials Chemistry C, 3(10), 2175-2181, (2015)

DOI:10.1039/c4tc02530j

96. Highly efficient blue electroluminescence based on thermally activated delayed fluorescence

Shuzo Hirata, Yumi Sakai, Kensuke Masui, Hiroyuki Tanaka, Sae Youn Lee, Hiroko Nomura, Nozomi Nakamura, Mao Yasumatsu, Hajime Nakanotani, Qisheng Zhang, Katsuyuki Shizu, Hiroshi Miyazaki, Chihaya Adachi

Nature Materials, 14(3), 330-336, (2015)

DOI:10.1038/nmat4154

97. Dual Intramolecular Charge-Transfer Fluorescence Derived from a Phenothiazine-Triphenyltriazine Derivative

Hiroyuki Tanaka, Katsuyuki Shizu, Hajime Nakanotani, Chihaya Adachi

The Journal of Physical Chemistry C, 118(29), 15985-15994, (2014)

DOI:10.1021/jp501017f

98. High-efficiency organic light-emitting diodes with fluorescent emitters

Hajime Nakanotani, Takahiro Higuchi, Taro Furukawa, Kensuke Masui, Kei Morimoto, Masaki Numata, Hiroyuki Tanaka, Yuta Sagara, Takuma Yasuda, Chihaya Adachi

Nature Communications, 5(1), 4016, (2014)

DOI:10.1038/ncomms5016

99. High-efficiency white organic light-emitting diodes using thermally activated delayed fluorescence

Jun-ichi Nishide, Hajime Nakanotani, Yasuhide Hiraga, Chihaya Adachi

Applied Physics Letters, 104(23), 233304, (2014)

DOI:10.1063/1.4882456

100. Analysis of alternating current driven electroluminescence in organic light emitting diodes: A comparative study

Le Zhang, Hajime Nakanotani, Kou Yoshida, Chihaya Adachi

Organic Electronics, 15(8), 1815-1821, (2014)

DOI:10.1016/j.orgel.2014.05.009

101. Light-emitting organic field-effect transistors based on highly luminescent single crystals of thiophene/phenylene co-oligomers

Takahiro Komori, Hajime Nakanotani, Takuma Yasuda, Chihaya Adachi

Journal of Materials Chemistry C, 2(25), 4918, (2014)

DOI:10.1039/c4tc00164h

102. Twisted Intramolecular Charge Transfer State for Long-Wavelength Thermally Activated Delayed Fluorescence

Hiroyuki Tanaka, Katsuyuki Shizu, Hajime Nakanotani, Chihaya Adachi

Chemistry of Materials, 25(18), 3766-3771, (2013)

DOI:10.1021/cm402428a

103. Capacitance-voltage characteristics of a 4,4′-bis[(N-carbazole)styryl]biphenyl based organic light-emitting diode: Implications for characteristic times and their distribution

Le Zhang, Hajime Nakanotani, Chihaya Adachi

Applied Physics Letters, 103(9), 093301, (2013)

DOI:10.1063/1.4819436

104. Multi-color light-emitting transistors composed of organic single crystals

Yohei Yomogida, Hayato Sakai, Kosuke Sawabe, Shota Gocho, Satria Zulkarnaen Bisri, Hajime Nakanotani, Chihaya Adachi, Taku Hasobe, Yoshihiro Iwasa, Taishi Takenobu

Organic Electronics, 14(11), 2737-2742, (2013)

DOI:10.1016/j.orgel.2013.07.025

105. Analysis of exciton annihilation in high-efficiency sky-blue organic light-emitting diodes with thermally activated delayed fluorescence

Kensuke Masui, Hajime Nakanotani, Chihaya Adachi

Organic Electronics, 14(11), 2721-2726, (2013)

DOI:10.1016/j.orgel.2013.07.010

106. Promising operational stability of high-efficiency organic light-emitting diodes based on thermally activated delayed fluorescence

Hajime Nakanotani, Kensuke Masui, Junichi Nishide, Takumi Shibata, Chihaya Adachi

Scientific Reports, 3(1), 2127, (2013)

DOI:10.1038/srep02127

107. Amplified Spontaneous Emission and Electroluminescence from Thiophene/Phenylene Co‐Oligomer‐Doped p‐bis(p‐Styrylstyryl)Benzene Crystals

Hajime Nakanotani, Chihaya Adachi

Advanced Optical Materials, 1(6), 422-427, (2013)

DOI:10.1002/adom.201200066

108. Photophysical characteristics of 4,4′-bis(N-carbazolyl)tolan derivatives and their application in organic light emitting diodes

Masakazu Ohkita, Ayataka Endo, Kimihiro Sumiya, Hajime Nakanotani, Takanori Suzuki, Chihaya Adachi

Journal of Luminescence, 131(7), 1520-1524, (2011)

DOI:10.1016/j.jlumin.2011.01.028

109. Formation of Organic Crystalline Nanopillar Arrays and Their Application to Organic Photovoltaic Cells

Masaya Hirade, Hajime Nakanotani, Masayuki Yahiro, Chihaya Adachi

ACS Applied Materials & Interfaces, 3(1), 80-83, (2011)

DOI:10.1021/am100915s

110. Highly conductive interface between a rubrene single crystal and a molybdenum oxide layer and its application in transistors

Hajime Nakanotani, Hayato Kakizoe, Chihaya Adachi

Solid State Communications, 151(1), 93-96, (2011)

DOI:10.1016/j.ssc.2010.10.004

111. Emission Color Tuning in Ambipolar Organic Single‐Crystal Field‐Effect Transistors by Dye‐Doping

Hajime Nakanotani, Masatoshi Saito, Hiroaki Nakamura, Chihaya Adachi

Advanced Functional Materials, 20(10), 1610-1615, (2010)

DOI:10.1002/adfm.200902339

112. Organic light-emitting diodes containing multilayers of organic single crystals

Hajime Nakanotani, Chihaya Adachi

Applied Physics Letters, 96(5), 053301, (2010)

DOI:10.1063/1.3298558

113. Tuning of threshold voltage by interfacial carrier doping in organic single crystal ambipolar light-emitting transistors and their bright electroluminescence 

Hajime Nakanotani, Masatoshi Saito, Hiroaki Nakamura, Chihaya Adachi

Applied Physics Letters, 95(10), 103307, (2009)

DOI:10.1063/1.3216047

114. Highly balanced ambipolar mobilities with intense electroluminescence in field-effect transistors based on organic single crystal oligo(p-phenylenevinylene) derivatives

Hajime Nakanotani, Masatoshi Saito, Hiroaki Nakamura, Chihaya Adachi

Applied Physics Letters, 95(3), 033308, (2009)

DOI:10.1063/1.3184588

115. Effect of Molecular Morphology on Amplified Spontaneous Emission of Bis‐Styrylbenzene Derivatives

Ryota Kabe, Hajime Nakanotani, Tomo Sakanoue, Masayuki Yahiro, Chihaya Adachi

Advanced Materials, 21(40), 4034-4038, (2009)

DOI:10.1002/adma.200803588

116. Low-Threshold Blue Emission from First-Order Organic DFB Laser Using 2,7-bis[4-(N-carbazole)phenylvinyl]-9,9′-Spirobifluorene as Active Gain Medium

Masaya Hirade, Hajime Nakanotani, Reiji Hattori, Akihiro Ikeda, Masayuki Yahiro, Chihaya Adachi

Molecular Crystals and Liquid Crystals, 504(1), 1-8, (2009)

DOI:10.1080/15421400902938928

117. Blue-Light-Emitting Ambipolar Field-Effect Transistors Using an Organic Single Crystal of 1,4-Bis(4-methylstyryl)benzene

Hajime Nakanotani, Ryota Kabe, Masayuki Yahiro, Taishi Takenobu, Yoshihiro Iwasa, Chihaya Adachi

Applied Physics Express, 1(26), 091801, (2008)

DOI:10.1143/apex.1.091801

118. Ambipolar field-effect transistor based on organic-inorganic hybrid structure

Hajime Nakanotani, Masayuki Yahiro, Chihaya Adachi, Koki Yano

Applied Physics Letters, 90(26), 262104, (2007)

DOI:10.1063/1.2752023

119. Spectrally narrow emission from organic films under continuous-wave excitation

Hajime Nakanotani, Chihaya Adachi, Sadayuki Watanabe, Ryuzi Katoh

Applied Physics Letters, 90(23), 231109, (2007)

DOI:10.1063/1.2746958

120. Extremely Low‐Threshold Amplified Spontaneous Emission of 9,9′‐Spirobifluorene Derivatives and Electroluminescence from Field‐Effect Transistor Structure

Hajime Nakanotani, S. Akiyama, D. Ohnishi, M. Moriwake, M. Yahiro, T. Yoshihara, S. Tobita, C. Adachi

Advanced Functional Materials, 17(14), 2328-2335, (2007)

DOI:10.1002/adfm.200700069

121. Very low amplified spontaneous emission threshold and electroluminescence characteristics of 1,1′-diphenyl substituted fluorene derivatives

Hajime Nakanotani, Naoki Matsumoto, Hiroyuki Uchiuzou, Masakazu Nishiyama, Masayuki Yahiro, Chihaya Adachi

Optical Materials, 30(4), 630-636, (2007)

DOI:10.1016/j.optmat.2007.02.045

122. Spectrally Narrow Emission at Cutoff Wavelength from Edge of Electrically Pumped Organic Light-Emitting Diodes

Daisuke Yokoyama, Hajime Nakanotani, Yousuke Setoguchi, Masato Moriwake, Dai Ohnishi, Masayuki Yahiro, Chihaya Adachi

Japanese Journal of Applied Physics, 46(9L), L826, (2007)

DOI:10.1143/jjap.46.l826

123. Optical and Electrical Properties of Bis(4-(phenylethynyl)phenyl)ethynes and Their Application to Organic Field-Effect Transistors

Takahito Oyamada, Guang Shao, Hiroyuki Uchiuzou, Hajime Nakanotani, Akihiro Orita, Junzo Otera, Masayuki Yahiro, Chihaya Adachi

Japanese Journal of Applied Physics, 45(12L), L1331, (2006)

DOI:10.1143/jjap.45.l1331

124. Injection and Transport of High Current Density over 1000 A/cm2 in Organic Light Emitting Diodes under Pulse Excitation

Hajime Nakanotani, Takahito Oyamada, Yuichiro Kawamura, Hiroyuki Sasabe, Chihaya Adachi

Japanese Journal of Applied Physics, 44(6R), 3659, (2005)

DOI:10.1143/jjap.44.3659

125. Singlet-singlet and singlet-heat annihilations in fluorescence-based organic light-emitting diodes under steady-state high current density

Hajime Nakanotani, Hiroyuki Sasabe, Chihaya Adachi

Applied Physics Letters, 86(21), 213506, (2005)

DOI:10.1063/1.1939075