ADVANCED MATERIALS AND DEVICE ENGINEERING LAB

CONFERENCE PRESENTATION and/or PROCEEDING

(* oral presentation)

2026

157) Y. -S. Choi, J. -Y. You, G. -S. Hwang, T. -J. Ha, Low-Voltage-Driven Flexible Transparent Heaters for Wearable Display Applications, IMID, Aug. 2026

156) H. -Y. Choi, B. -J. Kim, A. Oh, H. -C. Bae, T. -J. Ha, Effect of Passivation on Gamma-Ray-Induced Instability of Metal-Oxide Semiconducting Thin-Film Transistors, IMID, Aug. 2026

155) Y. -J. Cho, S. -W. Chu, J. -S. Yi, T. -J. Ha, Silicon Dioxide Dielectrics Synthesized through Plasma Enhanced Chemical Vapor Deposition Using an Alternative Oxidant for Display Backplanes, IMID, Aug. 2026

154) *T. -J. Ha (INVITED), Device engineering for high-performance thin-film transistors with advanced materials, AWAD, Jul. 2026

153) *Y. -S. Choi, S. -W. Cho, D. -W. Kang, T. -J. Ha, Perovskite-Based ReRAM for Enhanced Neuromorphic Synaptic Functionality, ACMME, Jun. 2026

152) *Y. -J. Cho, T. -J. Ha, Enhanced pH Sensing of Molybdenum Disulfide Field-Effect Transistor, ACMME, Jun. 2026

151) *T. -J. Ha (INVITED), All-solution-processed moisture electric generators for self-powered systems, KFPE, Feb. 2026

2025

150) *T. -J. Ha (INVITED), Surface engineering for improving device performance in nanoelectronics, KSSSE, Nov. 2025

149) Y. Cho, C. Kim, T. -J. Ha, Self-powered smart windows driven by triboelectric nanogenerators, IEIE, Nov. 2025 (Best presentation award)

148) *C. Kim, T. -J. Ha, Wearable temperature/touch sensors based on high-k metal-oxide films, ACMME, Jun. 2025

147) *E. Kim, T. -J. Ha, Post-thermal annealing on gate dielectric films for high-performance metal-oxide thin-film transistors, ACMME, Jun. 2025

146) *T. -J. Ha (INVITED), Self-powered wearable gas sensors for mobile respiration monitoring, KSS, Apr. 2025

2024

145) *M. Kim, S. Park, T. -J. Ha, Self-powered sensor systems based on triboelectric nanogenerators, ICERE, Feb. 2024 (Best presentation award) (Highlighted in Joongang Ilbo)

144) *S. Park, S. Park, T. -J. Ha, High-performance transparent heaters for bioelectronic applications, ICERE, Feb. 2024 (Best presentation award) (Highlighted in Joongang Ilbo)

2023

143) *S. Park, T. -J. Ha, Wearable UV photodetectors based on sol-gel-based metal-oxide films operating at sub-V, IEEE IPC, Nov. 2023

142) *B. Hedau, S. Park, T. -J. Ha, Water splitting based on metal-organic framework electrocatalysts, ICAE, Nov. 2023

141) *M. Kim, S. Park, T. -J. Ha, Electromaterial composites for enhanced output performance of triboelectric nanogenerators, ICAE, Nov. 2023

140) *S. Park, T. -J. Ha, Functionalized molybdenum disulfide monolayers for field-effect transistor-type gas sensors, ICAE, Nov. 2023

139) S. Park, T. -J. Ha, Fluorocarbon passivation for the improved device performance of thin-film transistors, KJF-ICOMEP, Aug. 2023

138) S. Park, T. -J. Ha, Device engineering in sol-gel-based metal-oxide thin-film transistors, IMID, Aug. 2023

137) S. Park, S. Park, T. -J. Ha, Effects of metal ion-doping on the electrical characteristics of oxygen-annealed metal-oxide thin-film transistors operating at Sub-V, IMID, Aug. 2023

136) *M. Kim, S. Park, T. -J. Ha, Triboelectric nanogenerators for wearable self-powered systems, NanoKorea, Jul. 2023

135) *S. Park, S. Park, T. -J. Ha, Transparent conductive electrodes based on solution-processed metal-nanowire films for high-performance transparent heaters, NanoKorea, Jul. 2023

134) S. Park, T. -J. Ha, Toward breath biosensors based on polymer incorporated metal oxide nanohybrids for the real-time diagnosis of metabolic disorders and their application in self powered bioelectronics, Biosensors, Jun. 2023

133) B. Hedau, T. -J. Ha, Green synthesized biosensors based on metal organic framework hollow nanocages for rapid and efficient electrochemical analyses of pesticides in food products, Biosensors, Jun. 2023

132) *S. Park, T. -J. Ha, Engineered polymer composites for high-performance wearable bioelectronics, APME, Apr. 2023

131) *S. Park, T. -J. Ha, Engineered carbon nanohybrids for wearable moist-electric generators, MRS spring, Apr. 2023

130) S. Park, T. -J. Ha, Polymerized ionogels for wearable chemical biosensors detecting biomarkers in exhaled breath, MRS spring, Apr. 2023

2022

129) S. Park, T. -J. Ha., Contact engineering for improved device performance in low-voltage operating molybdenum disulfide thin-film transistors in bioelectronic applications, ICCE-Asia, Oct. 2022

128) S. Park, T. -J. Ha et al., Flexible active-matrix devices based on sol-gel-based metal-oxide dielectrics and semiconductors by O2 annealing, IMID, Aug. 2022

127) B. Kang, T. -J. Ha, Protein-based conductive composites for wearable biosensors, MCARE, Aug. 2022

126) *S. Park, T. -J. Ha et al., Chemiresistive nano gas sensors based on molybdenum disulfide thin-film transistors for bioelectronic applications, NanoKorea, Jul. 2022

125) S. Park, T. -J. Ha, High-quality boron nitride thin films fabricated by solution process at low temperatures for flexible nanoelectronics, IWUMD, May 2022

124) *T. -J. Ha (INVITED), Chemiresistive-type nano gas sensors based on functionalization, Sensors, Apr. 2022

2021

123) B. Kang, T. -J. Ha et al., Printed nanocomposite films for human-interactive sensor applications, KFPE, Dec. 2021

122) J. Jeon, T. -J. Ha et al., All-solution-processed physical sensors for human-interactive displays, KFPE, Dec. 2021

121) *H. Choi, T. -J. Ha et al., Biocompatible conductive composites for biodegradable electronics, IUMRS-ICA, Oct. 2021

120) *S. Park, T. -J. Ha et al., Solution-processed metal-oxide dielectrics with controlled oxygen vacancies, IUMRS-ICA, Oct. 2021

119) J. Jeon, T. -J. Ha et al., Printable carbon-based nanocomposites for flexible/wearable electronic applications, IUMRS-ICA, Oct. 2021

118) B. Kang, T. -J. Ha et al., Hybrid nanocomposites for non-enzymatic electrochemical biosensors, ISE 2021, Sep. 2021 (Best poster award)

117) S. Park, T. -J. Ha et al., Low-voltage operating metal-oxide thin-film transistors with high-k crystalline metal-oxide dielectrics for active-matrix displays, IMID, Aug. 2021

116) J. Jeon, T. -J. Ha et al., The restorative effect of fluorocarbon encapsulation on the device performance of molybdenum disulphide thin-film transistors operating at low voltages for active matrix displays, IMID, Aug. 2021

115) S. Park, T. -J. Ha et al., Metal-oxide thin-film transistors operating at low-voltages for display backplanes, IMID, Aug. 2021

2020

114) H. Choi, T. -J. Ha et al., Highly stable and robust on-skin electronics on flexible substrates for human-interactive displays, IMID, Aug. 2020

113) *B. Kang, T. -J. Ha et al., Triboelectric nanogenerators with the reduced loss of tribo-charges, NanoKorea, Jul. 2020

112) *J. Jeon, T. -J. Ha et al., Improved dispersibility of carbon nanotube suspensions by polymeric additives, ICMEA, Jan. 2020

111) *S. Park, T. -J. Ha et al., Functionalized carbon nanotube random networks for high performance nanoelectronics, ICMEA, Jan. 2020 (Excellent oral presentation)

2019

110) B. Kang, T. -J. Ha et al., Molecular functionalization of graphene transistors for neural-interface systems, ICMS, Nov. 2019

109) B. Kang, T. -J. Ha et al., Functional nanocomposites for human-interactive sensors, Euromat, Sep. 2019

108) S. Park, T. -J. Ha et al., Wearable photo transistors with sol-gel based metal-oxide semiconductors for ultra-violet photodetectors, IMID, Aug. 2019

107) B. Yu, T. -J. Ha et al., Low-voltage operating metal-oxide thin film transistors for ultra thin flexible electronics, IMID, Aug. 2019

106) S. Park, T. -J. Ha et al., Device performance of solution-processed resistive random access memory consisting of nanocrystalline metal-oxide dielectrics, NanoKorea, Jul. 2019 (Best poster award)

105) B. Kang, T. -J. Ha et al., Chemiresistive pH sensors based on advanced nanocomposite materials for neurological healthcare monitoring systems, ICMAT, Jun. 2019

104) B. Kang, T. -J. Ha et al., All-solution-processed biosensors for detection of cortisol down to uM concentration, 6th International conference on Biosensing technology, Jun. 2019

103) J. Jeon, T. -J. Ha et al., Solution-processed wearable biosensors for exhaled breath monitoring systems, 6th International conference on Biosensing technology, Jun. 2019

102) *T. -J. Ha (INVITED), Advanced nano-materials for wearable sensor applications, MRS-K, May 2019

101) B. Kang, T. -J. Ha et al., Wearable motion sensors based on functional nano-composites, The Korean Sensors Society, Mar. 2019

2018

100) *T. -J. Ha (INVITED), Device physics of high performance inorganic and hybrid thin-film transistors, ENGE, Nov. 2018 (Best poster paper award)

99) *T. -J. Ha (INVITED), High performance thin-film transistors based on advanced materials for next generation displays, IMID, Aug. 2018

98) B. Kang, T. -J. Ha et al., Flexible piezocapacitive pressure sensors fabricated by all-solution-process for human-machine interfaces, ICMAP, Jul. 2018

97) *B. Yu, T. -J. Ha et al., Characteristics of solution-processed high-k dielectrics for high performance electronic devices, NanoKorea, Jul. 2018

96) *B. Yu, T. -J. Ha et al., Charge transport studies on solution-processed metal-oxide thin-film transistors for display backplanes, NanoKorea, Jul. 2018

95) J. Jeon, T. -J. Ha et al., Carbon nanotube based bio-electrodes for surface electromyogram sensors, ICSM, Jul. 2018

94) B. Kang, T. -J. Ha et al., Wearable carbon nanotube based biosensors for healthcare monitoring systems, ICSM, Jul. 2018

93) B. Kang, T. -J. Ha et al., Morphological planarization of perovskite absorbers using a phenyl-C61-Butyric acid methyl ester, WCPEC-7, Jun. 2018

92) *J. Jeon, T. -J. Ha et al., Solution-processed high-k dielectrics films for wearable neuroelectronics, ECS, May 2018

91) B. Kang, T. -J. Ha et al., High performance flexible bio-electronics for electrophysiological recordings, ECS, May 2018

90) B. Kang, T. -J. Ha et al., Wearable triboelectric energy harvesters for brain-machine interfaces, NGPT, May 2018

89) *B. Yu, T. -J. Ha et al., High performance solution-processed indium-gallium-zinc-oxide thin-film transistors on flexible substrates operating at low-voltage, KCS, Feb. 2018

88) *J. Jeon, T. -J. Ha et al., Solution-processed multi-wall carbon nanotube sensors for hydrogen peroxide gas detection, KCS, Feb. 2018

2017

87) B. Kang, T. -J. Ha et al., Wearable single-wall carbon nanotube thin-film transistor arrays for neuro-interfaces, ICAE, Nov. 2017

86) B. Yu, T. -J. Ha et al., Surface characteristics of dielectric films by contact angle measurements, ICAE, Nov. 2017

85) B. Kang, T. -J. Ha et al., A patterning technique to improve device performance of carbon nanotube based transistors for electroencephalogram sensor systems, ICAE, Nov. 2017

84) B. Yu, T. -J. Ha et al., Characteristics of high-k aluminium oxide thin films fabricated by solution-process for intelligent neural interface, ICAE, Nov. 2017

83) *B. Kang, T. -J. Ha et al., Solution-processed organic/inorganic nanocomposites for high performance human-interactive sensors, ICMEM, Nov. 2017

82) B. Kang, T. -J. Ha et al., Wearable electrophysiological sensors for healthcare monitoring systems, Annual meeting of the Korean Biochip society, Nov. 2017

81) *B. Yu, T. -J. Ha et al., Solution-processed metal-oxide semiconductors for neuromorphic electronics, IWOE24, Sep. 2017

80) B. Kang, T. -J. Ha et al., Patch-type carbon-based sensors for electromyogram, ICFPE, Sep. 2017

79) *H. Shin, T. -J. Ha et al., Trapping/Detrapping analysis on carbon nanotube thin film transistors using non-quasi static measurement, IMID, Aug. 2017

78) *B. Yu, T. -J. Ha et al., High-quality boron nitride thin films for high-resolution transparent displays, ICANS27, Aug. 2017

77) *T. -J. Ha (INVITED), Material design and structural integration for high performance electronics, APSMR, Jul. 2017 (Outstanding achievement award)

76) B. Kang, T. -J. Ha et al., Improving stability of perovskite solar cell employing fluorocarbon encapsulation, APSMR, Jul. 2017

75) B. Kang, T. -J. Ha et al., Ultra low voltage operating single-walled carbon nanotube thin-film transistors, NanoKorea, Jul. 2017

74) B. Park, T. -J. Ha et al., Wearable nanomaterial-based glucose biosensors with functionalized glucose oxidase, NanoKorea, Jul. 2017

73) B. Yu, T. -J. Ha et al., Interfacial engineering on solution-processed boron nitride thin films for optoelectronics, NanoKorea, Jul. 2017

72) B. Yu, T. -J. Ha, Material analysis of 2D boron nitride thin films for high performance memory devices, SCANDEM, Jun. 2017

71) *B. Park, T. -J. Ha et al., Structural integration of boron nitride thin films for carbon-based transistors, ICMFM, May 2017

70) B. Park, T. -J. Ha et al., Patch-type nitric oxygen gas sensor based on functionalized single-wall carbon nanotube thin films, KCS, Feb. 2017 (Best poster award)

2016

69) B. Park, T. -J. Ha, et al., High thermoelectric properties of solution-processed single-wall carbon nanotube/polymer composite films on flexible substrates, ENGE, Nov. 2016

68) J. Jeon, T. -J. Ha, et al., High performance ambipolar thin-film transistors based on solution-processed hybrid bilayers of carbon-nanotube/indium-gallium-zinc-oxide semiconductors, ENGE, Nov. 2016

67) J. Jeon, T. -J. Ha, Solution-processed nanoscale carbon nanotube thin-film transistors fabricated by electromigration, ECS prime, Oct. 2016

66) J. Jeon, T. -J. Ha, et al., Characteristics of boron nitride thin films for high performance nanoelectronics, ICMAP, Sep. 2016

65) J. Jeon, T. -J. Ha, Wearable pressure sensors based on electronic nanomaterials with tunable sensitivity, IWPMA-ECMD, Aug. 2016 (IUVSTA award)

64) B. Park, T. -J. Ha et al., Methylammonium lead mixed halide perovskite films processed with a new composition, IVC-20, Aug. 2016

63) J. Jeon, T. -J. Ha et al., Improved device performance of boron-nitride-based thin-film transistors, IVC-20, Aug. 2016

62) *J. Jeon, T. -J. Ha, High performance solution-processed carbon nanotube thin-film transistors by employing an interacting film, ICEIT, Jan. 2016

2015

61) J. Jeon, T. -J. Ha, Improved device performance of field-effect transistors based on graphene/fluoropolymer advanced materials, ICAE, Nov. 2015

60) J. Jeon, T. -J. Ha, Solution-processed carbon nanotube thin-film transistors for flexible display backplanes, IWFPE, Nov. 2015

59) J. Jeon, T. -J. Ha, High performance zinc-tin-oxide thin-film transistors encapsulated with fluoropolymer for transparent displays, IMID, Aug. 2015

58) *S. Kim, T. -J. Ha, P. Sonar, A. Dodabalapur, Sub-threshold charge transport in polymer/organic field-effect transistors, SPIE, Aug. 2015

57) J. Jeon, T. -J. Ha, Study on the density of trap states in semiconductor, ICDS, Jul. 2015

56) J. Jeon, T. -J. Ha, Wearable strain/pressure sensors based on nanomaterials with tunable sensitivity, NanoKorea, Jul. 2015

55) J. Jeon, T. -J. Ha, Photo-induced electrical instability in transparent electronics, PIERS, Jul. 2015

54) H. Shin, S. -Y. Park, T. -J. Ha, C. Lee, Non-quasi static measurement in random network carbon nanotube thin-film transistors for next-generation displays, SID, Jun. 2015

53) *T. -J. Ha, Device physics of organic and 2D field-effect transistors, 26th IC ME&D, May 2015

52) *S. Kim, T. -J. Ha, P. Sonar, A. Dodabalapur, Sub-threshold charge transport in polymer transistors, APS, Mar. 2015

51) S. -M. Koo, T. -J. Ha, Reduced charge transfer on device characteristics in carbon nanotube based thin-film transistors, ITC, Feb. 2015

2014

50) *T. -J. Ha, Advanced Material based thin-film transistors for printable electronics, IWC Materials for future IT, Dec. 2014

49) T. -J. Ha, J. Lee, D. Akinwande, A. Dodabalapur, Fluoro-carbon encapsulation on 2-dimensional material based field-effect transistors with improvement in device performance for next-generation displays, IMID, Korea, Aug. 2014 (Outstanding poster award)

48) J. Kim, K. Nam, T. -J. Ha, W. Cho, H. Chung, Rectifying characteristics of sol-gel derived TiOx thin films for 1D-1R resistance switching memory applications, SSDM, Japan, Sep. 2014

47) T. -J. Ha, J. Kim, W. Cho, H. Chung, A comparison of photo-induced hysteresis between hydrogenated amorphous silicon and amorphous IGZO thin-film transistors, SSDM, Japan, Sep. 2014

46) T. Lee, S. Koo, T. -J. Ha, Human interactive sensors based on CNT/conductive nanoparticle composites, ICMAP, Korea, Jul. 2014

45) H. Shin, T. -J. Ha, C. Lee, Velocity distributions of charge carriers in carbon nanotube thin-film transistors by using non-quasistatic measurement, ICMAP, Korea, Jul. 2014 (Best poster award)

44) J. Son, K. Choi, T. -J. Ha, Solution-processed carbon nanotube thin-film transistors for flexible displays, KIEEME, Korea, Jun. 2014

43) *A. Dodabalapur, P. Sonar, and T. -J. Ha, High-performance transistors based on donor-acceptor polymers, 247th ACS National Meeting & Exposition, Dallas, USA, Mar. 2014

2013

42) *T. -J. Ha, J. Lee, L. Tao, I. Kholmanov, R. S Ruoff, P. J. Rossky, D. Akinwande, and A. Dodabalapur, Graphene/fluoropolymer hybrid materials with enhancement of all device properties for improved field-effect transistors, IEEE IEDM 2013, Washington DC, USA, Dec. 2013

41) *J. Lee, T. -J. Ha, H. Li, R. S Ruoff, D. Akinwande, and A. Dodabalapur, High-performance flexible nanoelectronics: 2D atomic channel materials for low-power digital and high-frequency analog devices, IEEE IEDM 2013, Washington DC, USA, Dec. 2013

40) *P. Sonar, T. -J. Ha, T. Foong, S. P. Singh, A. Dodabalapur, Innovative p-functional printable low band gap polymers for ambipolar organic field effect transistors, The 15th Asian Chemical congress, Singapore, Aug. 2013

39) *T. -J. Ha, J. Lee, D. Akinwande, P. J. Rossky, A. Dodabalapur, Transformation of the Electrical Characteristics of Graphene Field-Effect Transistors with Fluoropolymer, SPIE, San Diego, USA, Aug. 2013

38) *T. -J. Ha, and A. Dodabalapur, Photo Stability of Solution-Processed Low-Voltage High Mobility Zinc-Tin-Oxide/Zirconium-Oxide Thin-Film Transistors for Transparent Display Applications, Electronic materials conference (EMC), University of Notre Dame, South Bend, USA, Jun. 2013

37) *P. Sonar, T. -J. Ha, T. Foong, Z. -E. Ooi, E. L. Williams, A. Dodabalapur, New high performance organic semiconducting printable materials using old diketopyrrolopyrrole dye based conjugated building blocks, International conference on materials for advanced technologies (ICMAT), Suntec Singapore, Jun. 2013

36) *T. -J. Ha, J. Lee, B. Worley, D. Akinwande, P. Rossky, and A. Dodabalapur, The Restorative Effects of Fluoropolymer Coating on the Electrical Characteristics of Graphene Field-Effect Transistor, Nano Night, Austin, USA, May 2013

35) *A. Dodabalapur, T. -J. Ha, and P. Sonar, Charge carrier transport in advanced DPP based polymer thin-film transistors, The Electrochemical society (ECS), Toronto, Canada, May 2013

34) *P. Sonar, T. -J. Ha, T. Foong, A. Dodabalapur, Push-Pull Based Novel p-Functional Polymeric Semiconductors for Printed Flexible Electronics, ECS, Toronto, Canada, May 2013

33) *T. -J. Ha, P. Sonar, and A. Dodabalapur, Charge transport and device physics in high mobility donor-acceptor polymer based transistors, MRS spring, San Francisco, USA, Apr. 2013

32) *D. A. Duarte, T. -J. Ha, X. Su, B. A. Yin, S.V. Sreenivasan, A. Dodabalapur, Nanomanufacturing of thin-film electronic circuits, NASCENT 1st meeting, LA, USA, Mar. 2013

2012

31) *J. Lee, K. N. Parrish, Sk. Fahad Chowdhury, T. -J. Ha, Y. Hao, L. Tao, A. Dodabalapur, D. Akinwande, State-of-art Graphene Transistors on Hexagonal Boron Nitride, High-k, and Polymeric Films for GHz Flexible Analog Nanoelectronics, IEEE IEDM, San Francisco, USA, Dec. 2012

30) *T. -J. Ha, P. Sonar, and A. Dodabalapur, Electronic properties and charge carrier transport on advanced DPP polymer thin-film transistors, MRS fall, Boston, USA, Nov. 2012

29) *P. Sonar, S. P. Singh, Y. Li, Z. -E. Ooi, T. -J. Ha, E. L. Williams and A. Dodabalapur, Diketopyrrolopyrrole -A Versatile Conjugated Building Block for Organic Electronics, International Conference on Ocean Energy (ICOE), Dublin, Ireland, Oct. 2012

28) *T. -J. Ha, J. Lee, Sk. Fahad Chowdhury, D. Akinwande, and A. Dodabalapur, Material properties and field-effect transistor characteristics of hybrid organic/graphene active layers, SPIE Optics+photonics, San Diego, USA, Aug. 2012

27) *A. Dodabalapur, P. Sonar, T. -J. Ha, Charge transport in donor acceptor polymer field-effect transistors, SPIE, San Diego, USA, Aug. 2012

26) *T. -J. Ha, P. Sonar, and A. Dodabalapur, Understanding dual-gate polymer field-effect transistors, DRC, Pennsylvania, USA, Jun. 2012

25) *T. -J. Ha, A. Lee, D. Akinwande, and A. Dodabalapur, Hybrid organic graphene field-effect transistors, EMC, Pennsylvania, USA, Jun. 2012

24) *L. Schulz, C. Lee, S. Jang, T. -J. Ha, B. Kim, and A. Dodabalapur, High mobility in FETs Based on Sol-Gel Processed Transparent Amorphous Semiconducting Oxides, MRS Spring, San Francisco, USA, Apr. 2012

2011

23) *T. -J. Ha, P. Sonar, and A. Dodabalapur, Charge Transport and Density of Trap States in Balanced High Mobility Ambipolar Organic Thin-Film Transistors, MRS Fall, Boston, USA, Dec. 2, 2011

22) *A. Dodabalapur, T. -J. Ha, C. Lee, P. Sonar, and S. P. Singh, Charge Transport in Polymer and Amorphous Oxide Transistors, International workshop on physics of semiconductor devices (IWPSD) Plenary, Kanpur, India, Dec. 2011

21) *P. Sonar, S. P. Singh, Y. Li, Z. -E. Ooi, T. -J. Ha, and A. Dodabalapur, Diketopyrrolopyrrole Based Donor-Acceptor Organic Semiconductors for High Performance Printed Electronics, Materials Science Metal & Manufacturing (M3), Singapore, Singapore, Dec. 2011

20) *T. -J. Ha, P. Sonar, and A. Dodabalapur, Charge carrier velocity distributions in polymer thin-film transistors, IMID, Seoul, Korea, Oct. 2011

19) *P. Sonar, S. P. Singh, Y. Li, Z. -E. Ooi, T. -J. Ha, Z. Chen, A. Dodabalapur, Diketopyrrolopyrrole based solution processable organic semiconductors for high performance organic electronics, SPIE Optics+photonics, San Diego, USA, Aug. 2011

18) *T. -J. Ha, P. Sonar and A. Dodabalapur, Charge Transport and Velocity Distribution in High Mobility Polymer Thin Film Transistors based on Diketopyrrolopyrrole-naphthalene Copolymer, MRS spring, San Francisco, USA, Apr. 2011

17) *T. -J. Ha, P. Sonar, S. P. Singh, A. Dodabalapur, Charge transport and velocity distribution in ambipolar organic thin film Transistors based on a diketopyrrolopyrrole-benzothiadiazole copolymer, American Physical Society (APS), Dallas, USA, Mar. 2011

2010

16) *A. Dodabalapur, C. Lee, T. -J. Ha, B. Cobb, P. Sonar, S. P. Singh, and L. Ferlauto, New approaches to study charge transport in organic and inorganic thin-film semiconductors, Symposium on Organic and Polymer Electronics, Singapore, Singapore, Dec. 2010

2009

15) *T. -J. Ha, S. Kim, J. Lee, S. Lee, H. Park and M. -K. Han, Hysteresis Phenomenon of oxide-based TFTs as transparent devices under the light illumination, IDW, Miyazaki, Japan, Dec. 9, 2009 (Best poster award)

14) *T. -J. Ha, S. Kim, S. Choi, S. Lee, H. Park and M. -K. Han, The Instability of Oxide-based Thin Film Transistors caused by the Negative Gate Bias Stress under the Light Illumination, AM-FPD, Nara, Japan, Jul. 2009 (Excellent oral presentation)

13) *T. -J. Ha, H. Park, S. Lee, S. Kim, and M. -K. Han, The Effect of Light on Amorphous Silicon Thin Film Transistors based on Photo-Sensor Applications, IMID, Kintex, Korea, Oct. 2009

12) *T. -J. Ha, S. Kim, S. Choi, J. Lee, H. Park and M. -K. Han, The Investigation on Hysteresis Phenomenon of hydrogenated amorphous Silicon TFTs based on AMOLED under the Dark and the illuminated Condition, Nordic Semiconductors meeting (NSM), Reykjavik, Iceland, Jun. 2009

2008

11) *T. -J. Ha, H. Park, S. Kuk, D. Kang and M. -K. Han, The Effect of Light under Electrical Bias Stresses on Amorphous Silicon Thin Film Transistors as Photo Sensor, IDW, Niigata, Japan, Dec. 2008

10) *T. -J. Ha, S. Park and M. -K. Han, Suppression of SPC-Si TFT leakage current effect on active matrix displays by employing an improved circular switch, The 15th KCS, Bogwang, Korea, Feb. 2008

9) *H. Park, T. -J. Ha, S. Ji, J. Lee, B. Lee, B. You, N. Kim and M. -K. Han, A New Touch Sensitive Active Matrix Display with Embedded Light Sensors, IDW, Niigata, Japan, Dec. 2008

8) W. Lee, T. -J. Ha, H. Park, J. Lee and M. -K. Han, Touch Screen Panel by using Liquid Crystal Capacitance Variation embedded in LTPS AMLCD, IMID, Kintex, Korea, Oct. 2008

7) S. Kim, S. Han, T. -J. Ha, S. Kuk, D. Kang and M. -K. Han, Nanocrystalline Silicon Thin Film Transistor Fabricated without any Substrate Heating for a Flexible Display, SID, LA, USA, May 2008

6) H. Park, T. -J. Ha, D. Woo, K. Shin, C. Kim and M. -K. Han, A New Monolithic Polysilicon Ambient Light Sensor System with Wide Dynamic Range for Active-Matrix Displays by Employing an Adaptive Sensitivity Control method, SID, LA, USA, May 2008

5) W. Lee, H. Park, T. -J. Ha, J. Lee and M. -K. Han, Touch Screen Panel embedded in AMLCD by using Liquid Crystal Capacitance Variation, AM-FPD, Tokyo, Japan, Jul. 2008

2007

4) H. Shin, W. Lee, S. Park, T. -J. Ha, M. -K. Han, New Fast Threshold Voltage Detecting Pixel Scheme for High Resolution and Large Area AMOLED Display, IDW, Sapporo, Japan, Dec. 2007

3) H. Park, S. Kuk, T. -J. Ha, H. Shin and M. -K. Han, A New Poly-Si TFT Pixel for Digital Driving AMOLED Displays Without Any Storage Capacitors,, IDW, Sapporo, Japan, Dec. 2007

2) S. Kim, S. Han, T. -J. Ha and M. -K. Han, Effect of plasma pre-treatment on nanocrystalline silicon film deposited without substrate heating, IDW, Sapporo, Japan, Dec. 2007

2008

1) S. Choi, S. Park, Won. Lee, T. -J. Ha, and M. -K. Han, Hysteresis Phenomenon in Sequential Lateral Solidification poly-Si Thin Film Transistor at 213K, MRS spring, San Francisco, USA, Mar. 2008