V Bhatt, M Kumar, HN Kim, D Yoo, JH Yun, MJ Choi, "Pyro-phototronic Effect in Colloidal Quantum Dots on Silicon Heterojunction for High-detectivity Infrared Photodetectors" Nano Energy, (2025) 133, 110465 Article Link.
TT Tran, V Bhatt, MJ Choi, HT Nguyen, A Sharma, M Kumar, JH Yun, "Thermal decomposition-assisted, aspect ratio controlled ZnO nanorods towards highly selective H2 gas detection" International Journal of Hydrogen Energy (2024) 84, 768-779 Article Link.
TT Tran, HT Nguyen, A Sharma, YB Cho, M Kumar, JH Yun, "Expanding the Spectral Responsivity of Photodetectors via the Integration of CdSe/ZnS Quantum Dots and MEH− PPV Polymer Composite" Polymers (2024) 16(16), 2371 Article Link.
HT Nguyen, TT Tran, M Kumar, J Song, SH Choi, HJ Jeong, YH Song, JH Yun "Enhancing thermal consistency and stability of quantum dots through encapsulation: A study on microscale-structured hybrid for WLEDs" Materials Today Nano (2024) 27, 100504 Article Link.
OC Emeka, TT Nguyen, C Choi, K Lee, SM Kim, JH Yun, J Kim "Metal-embedded metal oxide hybrid structure for the functional improvement of all-transparent photovoltaics" Solar Energy Materials and Solar Cells (2024) 269, 112793 Article Link.
YB Cho, BW Yoon, JH Yun "A Study on Environmental Effect Around the Site for the Establishment of a Marine Healing Center" Nanotechnology Perceptions (2024) 639–669 Article Link.
HT Nguyen, TT Nguyen, TT Tran, J Bang, M Kumar, J Kim, JH Yun "Colour-Passive radiative cooling in optoelectronics with Silver/Quantum dot decorated silica multifunctional hybrid structures" Chemical Engineering Journal (2024) 488, 150840 Article Link.
N Kumar, C Choi, J Lee, M Patel, WA Anderson, JH Yun, J Yi, J Kim "Mitigation of Exciton Quenching Sites in All‐Metal‐Oxide‐Based Transparent Photovoltaic" Solar RRL (2024) 8(7), 2301056 Article Link.
D. Kim, T.T. Tran, V. Bhatt, H. T. Nguyen, J. Kim, M. Kumar, J.H. Yun, "Unraveling the highly sensitive-selective NO2 sensing characteristics of perfect and agglomerated Zn2SnO4 octahedrons", Journal of Environmental Chemical Engineering (2023) 11(5) 110648 Article Link.
TT Nguyen, HT Nguyen, JH Yun, J Park, J Kim, "Two-dimensional silver film for all-inorganic transparent photovoltaics", Materials Letters (2023) 345 124486 Article Link.
V Bhatt, S Sahare, M Kumar, SL Lee, S Kumar, JH Yun, "Pyro‐phototronic effect in n‐Si/p‐MoO3‐x heterojunction: An approach to improve the photoresponse of the ultraviolet photodetector" physica status solidi (RRL)–Rapid Research Letters (2023) 17(9) 2200500 Article Link.
R Kumar, SK Mishra, A Kumar, I Kumar, M Kumar, JH Yun, S Kumar, A.K. Singh "Investigation of efficient photoconduction and enhanced luminescence characteristics of Ce‐doped ZnO nanophosphors for UV sensors" Luminescence (2023) 38(7) 1405-1415 Article Link.
Y Park, J Kim, JH Yun, S Jang, SM Kim, "Oil-gated isoporous membrane with micro-apertures for controllable pressure-induced passive flow regulator", RSC advances (2023) 13 (30), 20486-20494 Article Link.
V Bhatt, ST Kim, M Kumar, HJ Jeong, J Kim, JH Jang, JH Yun "Impact of Na diffusion on Cu (In, Ga) Se2 solar cells: unveiling the role of active defects using thermal admittance spectroscopy" Thin Solid Films (2023) 767(28) 139673 Article Link.
V Bhatt, M Kumar, EC Kim, HJ Chung, JH Yun "Wafer-Scale, Thickness-Controlled p-CuInSe2/n-Si Heterojunction for Self-Biased, Highly Sensitive, and Broadband Photodetectors" ACS Applied Electronic Materials (2022) 4 (12), 6284-6299 Article Link.
V Bhatt, M Kumar, EC Kim, HJ Chung, JH Yun "Temperature-dependent phase formation of CuInSe2 for self-biased, broadband Si/CuInSe2 heterojunction photodetector", Journal of Alloys and Compounds (2022) 922, 166190 Article Link.
I Chauhan, M Kaur, K Singh, RK Sharma, M Kumar, JH Yun, A Kumar "WTe2/FeS2 nanocomposite thin films: Structural, compositional, temperature-dependent photodetection studies" Materials Science in Semiconductor Processing (2022) 151, 107039 Article Link.
E Song, HT Nguyen, J Park, TT Tran, M Kumar, V Bhatt, V A Dao, W Lee, JH Yun "Enhancement of photoconversion efficiency of CdSe quantum dots sensitized Al doped ZnO/Si heterojunction device decorated with Ag nanostructures" Materials Science in Semiconductor Processing (2022) 149, 106878 Article Link.
HT Nguyen, TT Tran, V Bhatt, M Kumar, JH Yun "Photoluminescence Properties of CdSe/ZnS Quantum Dot Donor–Acceptor via Plasmon Coupling of Metal Nanostructures and Application on Photovoltaic Devices" The Journal of Physical Chemistry Letters (2022) 13 (19), 4394-4401 Article Link.
ST Kim, V Bhatt, YC Kim, HJ Jeong, JH Yun, JH Jang "Formation of MoSe2 layer and Ga grading in flexible Cu (In, Ga) Se2 solar cell via Na diffusion" Journal of Alloys and Compounds (2022) 899, 163301 Article Link.
V Bhatt, M Kumar, JH Yun "Unraveling the photoconduction characteristics of single-step synthesized CuS and Cu9S5 micro-flowers" Journal of Alloys and Compounds (2022) 891, 161940 Article Link.
HT Nguyen, TT Tran, V Bhatt, M Kumar, J Song, JH Yun "Enhancement of Schottky Junction Silicon Solar Cell with CdSe/ZnS Quantum Dots Decorated Metal Nanostructures" Applied Sciences (2021) 12 (1), 83 Article Link.
S Sahare, M Kumar, P Ghoderao, R Aepuru, SL Lee, JH Yun "Chapter: Oxide Perovskites and Their Derivatives for Photovoltaics Applications" Advanced Ceramics for Energy and Environmental Applications 1st edition (2021) 216-230 CRC Press Article Link.
A Kumar, M Kumar, V Bhatt, S Mukherjee, S Kumar, H Sharma, MK Yadav, S Tomar, JH Yun, RK Choubey "Highly responsive and low-cost ultraviolet sensor based on ZnS/p-Si heterojunction grown by chemical bath deposition" Sensors and Actuators A: Physical (2021) 331, 112988 Article Link.
ST Kim, HJ Jeong, YC Kim, V Bhatt, M Kumar, JH Yun, JH Jang "Effect of Na-doped Mo layer as a controllable sodium reservoir and diffusion barrier for flexible Cu (In, Ga) Se2 solar cells" Energy Reports (2021) 7, 2255-2261 Article Link.
M Kumar, V Bhatt, J Kim, JH Yun "Solvent and catalyst-free synthesis of In2O3 octahedron using single-step thermal decomposition technique for NO2 detection" Journal of Alloys and Compounds (2021) 877, 160161 Article Link.
P Singh, M Kaur, K Singh, R Meena, M Kumar, JH Yun, A Thakur, F Nakagawa, M Suzuki, H Nakamura, A Kumar "Fluorescent boron carbide quantum dots synthesized with a low-temperature solvothermal approach for boron neutron capture therapy" Physica E: Low-dimensional Systems and Nanostructures (2021) 132, 114766 Article Link.
M Patel, JH Seo, S Kim, TT Nguyen, M Kumar, JH Yun, J Kim "Photovoltai-driven transparent heater of ZnO-coated silver nanowire networks for self-functional remote power system" Journal of Power Sources (2021) 491, 229578 Article Link.
A Kumar, M Kumar, V Bhatt, D Kim, S Mukherjee, JH Yun, RK Choubey "ZnS microspheres-based photoconductor for UV light-sensing applications" Chemical Physics Letters (2021) 763, 138162 Article Link.
M Kumar, V Bhatt, J Kim, AC Abhyankar, HJ Chung, K Singh, YB Cho, YJ Yun, KS Lim, JH Yun "Holey engineered 2D ZnO-nanosheets architecture for supersensitive ppm level H2 gas detection at room temperature" Sensors and Actuators B: Chemical (2021) 326, 128839 Article Link.
AK Rana, M Patel, TT Nguyen, JH Yun, J Kim "Transparent Co3O4/ZnO photovoltaic broadband photodetector" Materials Science in Semiconductor Processing (2020) 117, 105192 Article Link.
HJ Jeong, YC Kim, ST Kim, MH Choi, YH Song, JH Yun, MS Park, JH Jang "Cu(In,Ga)Se2 Solar Cells Integrated with Subwavelength Structured Cover Glass Fabricated by One-Step Self-Masked Etching" Micromachines (2020) 11 (9), 877 Article Link.
C Tong, M Kumar, JH Yun, J Kim, SJ Kim "High-Quality ITO/Al-ZnO/n-Si Heterostructures with Junction Engineering for Improved Photovoltaic Performance" Applied Sciences (2020) 10 (15), 5285 Article Link.
M Kumar, V Bhatt, JH Yun "Hierarchical 3D micro flower-like Co3O4 structures for NO2 detection at room temperature" Physics Letters A (2020) 384 (19), 126477 Article Link.
M Kumar, V Bhatt, AC Abhyankar, JH Yun, HJ Jeong "Multifunctional dumbbell-shaped ZnO based temperature-dependent UV photodetection and selective H2 gas detection" International Journal of Hydrogen Energy (2020) 45 (29), 15011-15025 Article Link.
HH Park, Y Koh, CY Cho, M Kumar, JH Yun, KH Park "Improved Hydrogen Sensing Performance of AlGaN/GaN Based Gas Sensors with Controlled Surface Nanostructures of Platinum Nanoparticulate Films" Journal of Nanoscience and Nanotechnology (2020) 20 (4), 2503-2507 Article Link.
YC Kim, HJ Jeong, ST Kim, YH Song, BY Kim, JP Kim, BK Kang, JH Yun, JH Jang "Luminescent down-shifting CsPbBr 3 perovskite nanocrystals for flexible Cu (In, Ga) Se 2 solar cells" Nanoscale (2020) 12 (2), 558-562 Article Link.
AK Rana, DK Ban, M Patel, JH Yun, J Kim "A transparent photovoltaic device based on Cu2O/ZnO/AZO for see-through applications" Materials Letters (2019) 255, 126517 Article Link.
K Singh, M Kumar, P Singh, G Kaur, B Singh, A Thakur, JH Yun, A Kumar "NiO nanostructures: Effect of iron doping on structural, defect chemistry and spectroscopic properties" AIP Conference Proceedings (2019) 2115 (1), 030121 Article Link.
HJ Jeong, YC Kim, SK Lee, JH Yun, JH Jang "Enhanced spectral response of CIGS solar cells with anti-reflective subwavelength structures and quantum dots" Solar Energy Materials and Solar Cells (2019) 194, 177-183 Article Link.
V Bhatt, M Kumar, J Kim, HJ Chung, JH Yun "Persistent photoconductivity in Al-doped ZnO photoconductors under air, nitrogen and oxygen ambiance: Role of oxygen vacancies induced DX centers" Ceramics International (2019) 45 (7), 8561-8570 Article Link.
M Kumar, V Bhatt, A Kumar, JH Yun "Nano lily-buds garden like ZnO nanostructures based gas sensor for H2 detection" Materials Letters (2019) 240, 13-16 Article Link.
S Abbas, M Kumar, DK Ban, JH Yun, J Kim "Transparent and Flexible In2O3 Thin Film for Multilevel Nonvolatile Photomemory Programmed by Light" ACS Applied Electronic Materials (2019) 1 (3), 437-443 Article Link.
M Kumar, JH Yun, V Bhatt, B Singh, J Kim, JS Kim, BS Kim, CY Lee "Role of Ce3+ valence state and surface oxygen vacancies on enhanced electrochemical performance of single step solvothermally synthesized CeO2 nanoparticles" Electrochimica Acta (2018) 284, 709-720
C Tong, ES Kozarsky, J Kim, J Yun, WA Anderson "Metal-induced growth of crystal Si for low-cost Al: ZnO/Si heterojunction thin film photodetectors" Materials Science in Semiconductor Processing (2018)82, 92-96
M Kumar, V Bhatt, AC Abhyankar, J Kim, A Kumar, SH Patil, JH Yun "New insights towards strikingly improved room temperature ethanol sensing properties of p-type Ce-doped SnO2 sensors" Scientific Reports (2018) 8 (1), 8079
HJ Jeong, DS Kim, SB Kim, CK Park, JH Yun, JH Jang "Enhanced Light Absorption in Concentrated GaInP/GaAs/Ge Solar Cells Using a Secondary Optical Element with Subwavelength Structures" Nanoscience and Nanotechnology Letters (2018) 10 (3), 413-416
V Bhatt, M Kumar, P Yadav, M Kumar, JH Yun, "Low cost and solution processible sandwiched CH3NH3PbI3-xClx based photodetector" Materials Research Bulletin (2018) 99, 79-85
M Kumar, V Bhatt, AC Abhyankar, J Kim, A Kumar, JH Yun, "Modulation of Structural Properties of Sn doped ZnO for UV Photoconductors" Sensors and Actuators A: Physical (2018) 270, 118-126
M Patel, HS Kim, J Kim, JH Yun, SJ Kim, EH Choi, HH Park, "Excitonic metal oxide heterojunction (NiO/ZnO) solar cells for all-transparent module integration" Solar Energy Materials and Solar Cells (2017) 170, 246-253
HJ Jeong, YC Kim, SK Lee, Y Jeong, JW Song, JH Yun, JH Jang "Ultrawide Spectral Response of CIGS Solar Cells Integrated with Luminescent Down-Shifting Quantum Dots" ACS applied materials & interfaces (2017) 9 (30), 25404-25411
DB Patel, KR Chauhan, WH Park, HS Kim, J Kim, JH Yun, "Tunable TiO 2 films for high-performing transparent Schottky photodetector", Materials Science in Semiconductor Processing (2017) 61, 45-49
M Kumar, B Singh, P Yadav, V Bhatt, M Kumar, K Singh, AC Abhyankar, A Kumar, JH Yun "Effect of structural defects, surface roughness on sensing properties of Al doped ZnO thin films deposited by chemical spray pyrolysis technique" Ceramics International (2017) 43(4), 3562-3568
YH Paik, HS Kojori, JH Yun, SJ Kim, "Improved efficiency of ferroelectric Pb(Zr,Ti)O3(PZT) based photovoltaic device with colloidal quantum dots" (2016) Materials Letters 185, 247-251
M Kumar, HS Kojori, SJ Kim, HH Park, J Kim, JH Yun, "Plasmonic effect–enhanced Ag nanodisk incorporated ZnO/Si metal–semiconductor–metal photodetectors" (2016) Journal of Photonics for Energy 6(4), 042508-042508
HS Kojori, S Cho, R Han, JH Yun, J Kim, SJ Kim, "Efficient hot electron collection, detection, and amplification in plasmon field-effect transistor" (2016) Journal of Photonics for Energy 6 (4), 042509-042509
JH Yun, MD Kumar, M Patel, YC Park, BS Kim, J Kim, "Transparent conductor-embedding high-sensitive germanium NIR photodetector" (2016) Materials Science in Semiconductor Processing 48, 95-100
C Tong, JH Yun, YJ Chen, D Ji, Q Gan, W Anderson, "Thermally Diffused Al: ZnO Thin Films for Broadband Transparent Conductor" ACS applied materials & interfaces (2016)
HS Kojori, JH Yun, Y Paik, J Kim, W Anderson, Sung Jin Kim, "Plasmon Field Effect Transistor for Plasmon to Electric Conversion and Amplification" Nano letters (2016) 16(1), pp.250–254
JH Yun, HS Kim, MD Kumar, HH Park, J Kim, "Si photodetectors imprinted with ITO nanodomes for enhanced photodetection at NIR wavelengths" Materials Science in Semiconductor Processing (2015) 40 pp.397-401
JH Yun, MD Kumar, YC Park, HS Kim, J Kim, "High performing ITO/Ge heterojunction photodetector for broad wavelength detection" Journal of Materials Science: Materials in Electronics (2015) 26(8), pp.6099-6106
HS Kim, JH Yun, HH Park, MD Kumar, Joondong Kim, "Three-dimensional nanodome-printed transparent conductors for high-performing Si photodetectors" Materials Letters (2015) 148, pp.174-177
J Kim, MD Kumar, JH Yun, HH Park, E Lee, DW Kim, H Kim, M Kim, J Yi, H Kim and C Jeong "Transparent conductor-embedding nanolens for Si solar cells" Appl. Phys. Lett. (2015) 106, 151904
D Navaneethan, JH Yun, J Kim "Effect of surficial length on transparent conductor-coated Si pillar arrays" Materials Express (2015) 5(3) 261-267
HS Kim, JH Yun, HH Park, MD Kumar, J Kim, "Three-dimensional nanodome-printed transparent conductors for High-performing Si photodetectors" Materials Letters (2015) 148, 174-177
J Kim, JH Yun, H Kim, Y Cho, HH Park, MD Kumar, J Yi, WA Anderson, DW Kim, "Transparent conductor-embedding nanocones for selective emitters: Optical and electrical improvements of Si solar cells" Scientific reports (2015) 5(9256)
JH Yun, MD Kumar, YC Park, J Kim, "Transparent conductors with an ultrathin nickel layer for high-performance photoelectric device applications" Materials Science in Semiconductor Processing (2015) 31, 334-339
JH Yun, N Duraisamy, MD Kumar, J Kim, "Optical and electrical properties of AZO/Ni/ITO transparent conductor" Materials Letters (2015) 143, 215-218
MD Kumar, JH Yun, J Kim, "Periodically structured Si pillars for high-performing heterojunction photodetectors" Infrared Physics & Technology (2015) 69, 174–178
JH Yun , E Lee , HH Park , DW Kim , W A. Anderson , J Kim N M. Litchinitser , J Zeng , J Yi , M. D Kumar , J Sun, "Incident light adjustable solar cell by periodic nanolens architecture" Scientific reports (2014) 4(6879), pp.1-8
YJ Chen, C Tong, JH Yun, W A. Anderson "Current Transport in Al-Diffused ZnO/Si Heterostructures"Journal of Electronic Materials, (2014) 44(1), 96-102
MD Kumar, JH Yun, J Kim "Metal/Semiconductor and Transparent Conductor/Semiconductor Heterojunctions in High Efficient Photoelectric Devices: Progress and Features" International Journal of Photoenergy, (2014) 160379
JH Yun, J Kim, YC Park "Transparent conductor-Si pillars heterojunction photodetector" Journal of Applied Physics, (2014) 116 (6), 064904
C Tong, JH Yun, H Song, Q Gan, W A Anderson, "Plasmonic-enhanced Si Schottky Barrier Solar Cells" Sol. Energy Mater. Sol. Cells (2014) 120, pp.591-595
C Tong, JH Yun, H Song, Q Gan, and W A. Anderson, "Plasmonic-enhanced Si Schottky Solar Cells", Sol. Energy Mater. Sol. Cells (2013) 120, pp.591-595
JH Yun, J Kim, YC Park, SJ Moon, and W A. Anderson, “Dual transparent conducting layers for Si photovoltaics” Thin Solid Films (2013) 547, pp. 17-21
SH Hong, JH Yun, HH Park, and J Kim, "Nanodome-patterned transparent conductor for highly responsive photoelectric device" Appl. Phys. Lett. (2013) 103, pp.153504
H Kim, J Kim, E Lee, DW Kim, JH Yun, and J Yi, "Effect of the short collection length in silicon microscale wire solar cells", Appl. Phys. Lett. (2013) 102, pp.193904
C Tong, JH Yun, E Kozarsky and W A. Anderson, “Nanoplasmonic Enhanced ZnO/Si Heterojunction Metal-Semiconductor-Metal Photodetectors”, Journal of Electronic Materials (2013), 42(5), pp.889-893
JH Yun, J Kim, H S Kojori, SJ Kim, C Tong, and W A. Anderson, "Current Enhancement of Aluminum Doped ZnO/n-Si Isotype Heterojunction Solar Cells by Embedding Silver Nanoparticles" J. Nanosci. Nanotechnol. (2013) 13(8), pp.5547-5551
J Kim, M Kim, H Kim, K Song, E Lee, DW Kim, JH Yun, BI Choi, S Lee, C Jeong, and J Yi, "Effective light management of three-dimensionally patterned transparent conductive oxide layers", Appl. Phys. Lett. (2012) 101, pp.143904
JH Yun, YC Park, J Yi, CS Woo, J Kim, "Doping-Free Fabrication of Silicon Thin films for Schottky Solar Cell", J. Nanosci. Nanotechnol. (2012) 12(2), pp.1371-1374
J Kim, JH Yun, YC Park, W A. Anderson, "Transparent and crystalline Al-doped ZnO film-embedded heterojunction Si solar cell", Materials Letters (2012) 75 pp.99-101.
JH Yun, J Kim, "Double Transparent Conducting Oxide Films for Photoelectric Devices", Materials Letters (2012) 70(1) pp.4-6.
W Seo, JH Yun, YC Park, CS Han, J Lee, S Jeong, "Synthesis and characterization of lead selenide nanocrystal quantum dots and wires.", J. Nanosci. Nanotechnol. (2011) 11(5) pp.4347-50.
J Kim, JH Yun, SW Jee, YC Park, M Ju, S Han, Y Kim, JH Kim, W A Anderson, JH Lee, "Rapid thermal annealed Al-doped ZnO film for a UV detector", Materials Letters (2011) 65(4) pp.786-789.
T Yen, JH Yun, SJ Kim, A Cartwright, W A. Anderson, "Photocurrent Enhancement in Nanocrystalline-ZnO/Si Heterojunction Metal-Semiconductor-Metal Photodetectors", Electrochem. Solid-State Lett. (2011) 14 pp.H415-H418.
JH Yun, YC Park, J Kim, HJ Lee, W A Anderson, Jeunghee Park,"Solution-processed germanium nanowire-positioned Schottky solar cells.", Nanoscale Research Letters (2011) 6(1) pp.287
F Catalfamo, T Yen, JH Yun, W A. Anderson, "Effects of High-Energy Electron Irradiation on ZnO/Si MSM Photodetectors", Journal of Electronic Materials (2011) 40(4) pp.433-439
J Kim, JH Yun, MS Hyun, YH Shin, YC Park, J Lee, S Jeong, CS Han,"Functional microscopy tip fabrication by an electric conductive nanowire", J. Nanosci. Nanotechnol. (2010) 10(5) pp.3207-3210.
J Kim, JH Yun, CH Kim, YC Park, JY Woo, J Park, JH Lee, J Yi, CS Han,"ZnO nanowire-embedded Schottky diode for effective UV detection by the barrier reduction effect.", Nanotechnology (2010) 21(11) pp.115205.
JH Yun, J Kim, YC Park, JW Song, DH Shin, CS Han, "Highly sensitive carbon nanotube-embedding gas sensors operating at atmospheric pressure.", Nanotechnology (2009) 20(5) pp.55503.
J Kim, JH Yun, JW Song, CS Han, "The spontaneous metal-sitting structure on carbon nanotube arrays positioned by inkjet printing for wafer-scale production of high sensitive gas sensor units", Sensors and Actuators B: Chemical (2009) 135(2) pp.587-591.
J Kim, JH Yun, CS Han, "Nanomaterial-embedded gas sensor fabrication", Current Applied Physics (2009) 9(2) pp.e38-e41.
J Kim, JH Yun, CS Han, YJ Cho, J Park, YC Park, "Multiple silicon nanowires-embedded Schottky solar cell", Appl. Phys. Lett. (2009) 95 pp.143112
DH Shin, JE Kim, HC Shim, JW Song, JH Yun, J Kim, S Jeong, J Kang, S Baik, CS Han, "Continuous extraction of highly pure metallic single-walled carbon nanotubes in a microfluidic channel.", Nano Letters (2008) 8(12) pp.4380-4385.
J Kim, YH Shin, JH Yun, CS Han, MS Hyun, W A Anderson, "A nickel silicide nanowire microscopy tip obtains nanoscale information", Nanotechnology (2008) 19(48) pp.485713.
SW. Cho, J H. Yun, D H. Jun, J I. Song, I Adesida, N Pan, and J H Jang, "High performance InP/InAlAs/GaAsSb/InP double heterojunction bipolar transistors", Solid-State Electronics (2006) 50, 902-907