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Journal Articles

Solar-blind ultraviolet photodetectors with thermally reduced graphene oxide formed on high-Al-content AlGaN layers

Bhishma Pandit, Jaehee Cho
Journal: AIP Advances
AIP Advances 11, 115322 (2021)
https://doi.org/10.1063/5.0072093
Published: November 2021
View article titled, Solar-blind ultraviolet photodetectors with thermally reduced graphene oxide formed on high-Al-content AlGaN layers
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Journal Articles

Determination of Schottky barrier height of graphene electrode on AlGaN/GaN heterostructure

Bhishma Pandit, Jaeho Kim, Jaehee Cho
Journal: AIP Advances
AIP Advances 11, 045314 (2021)
https://doi.org/10.1063/5.0043981
Published: April 2021
View article titled, Determination of Schottky barrier height of graphene electrode on AlGaN/GaN heterostructure
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Journal Articles

Effects of electrochemical potentiostatic activation on carrier transport in AlGaN-based deep-ultraviolet light-emitting diodes

Dong Yeong Kim, Hyunwoong Kang, Koh Eun Lee, Rak Jun Choi, June Key Lee, Jaehee Cho
Journal: Journal of Vacuum Science & Technology A
J. Vac. Sci. Technol. A 39, 023410 (2021)
https://doi.org/10.1116/6.0000827
Published: February 2021
View article titled, Effects of electrochemical potentiostatic activation on carrier transport in AlGaN-based deep-ultraviolet light-emitting diodes
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Includes: Supplementary data
Journal Articles

Counter-intuitive junction temperature behavior in AlGaN-based deep-ultraviolet light-emitting diodes

Dong Yeong Kim, Jeonghyeon Park, Jaehee Cho, Jong Kyu Kim
Journal: AIP Advances
AIP Advances 10, 045135 (2020)
https://doi.org/10.1063/5.0005473
Published: April 2020
View article titled, Counter-intuitive junction temperature behavior in AlGaN-based deep-ultraviolet light-emitting diodes
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Includes: Supplementary data
Journal Articles

Transfer or delivery of micro light-emitting diodes for light-emitting diode displays

Jaehee Cho, Jong Kyu Kim
Journal: AIP Advances
AIP Advances 9, 100901 (2019)
https://doi.org/10.1063/1.5118992
Published: October 2019
View article titled, Transfer or delivery of micro light-emitting diodes for light-emitting diode displays
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Journal Articles

Effects of surface passivation dielectrics on carrier transport in AlGaN/GaN heterostructure field-effect transistors

Sejoon Oh, Han-Soo Jang, Chel-Jong Choi, Jaehee Cho
Journal: AIP Advances
AIP Advances 8, 045116 (2018)
https://doi.org/10.1063/1.5027634
Published: April 2018
View article titled, Effects of surface passivation dielectrics on carrier transport in AlGaN/GaN heterostructure field-effect transistors
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Journal Articles

Current transport mechanism in graphene/AlGaN/GaN heterostructures with various Al mole fractions

Bhishma Pandit, Tae Hoon Seo, Beo Deul Ryu, Jaehee Cho
Journal: AIP Advances
AIP Advances 6, 065007 (2016)
https://doi.org/10.1063/1.4953917
Published: June 2016
View article titled, Current transport mechanism in graphene/AlGaN/GaN heterostructures with various Al mole fractions
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Journal Articles

Energy bandgap variation in oblique angle-deposited indium tin oxide

Kyurin Kim, Jun Hyuk Park, Hyunsoo Kim, Jong Kyu Kim, E. Fred Schubert, Jaehee Cho
Journal: Applied Physics Letters
Appl. Phys. Lett. 108, 041910 (2016)
https://doi.org/10.1063/1.4940998
Published: January 2016
View article titled, Energy bandgap variation in oblique angle-deposited indium tin oxide
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Journal Articles

Variation of the external quantum efficiency with temperature and current density in red, blue, and deep ultraviolet light-emitting diodes

Jun Hyuk Park, Jong Won Lee, Dong Yeong Kim, Jaehee Cho, E. Fred Schubert, Jungsub Kim, Jinsub Lee, Yong-Il Kim, Youngsoo Park, Jong Kyu Kim
Journal: Journal of Applied Physics
J. Appl. Phys. 119, 023101 (2016)
https://doi.org/10.1063/1.4939504
Published: January 2016
View article titled, Variation of the external quantum efficiency with temperature and current density in red, blue, and deep ultraviolet light-emitting diodes
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Journal Articles

Fabrication of tapered graded-refractive-index micropillars using ion-implanted-photoresist as an etch mask

Ming Ma, E. Fred Schubert, Jaehee Cho, Morgan Evans, Gi Bum Kim, Cheolsoo Sone
Journal: Journal of Vacuum Science & Technology A
J. Vac. Sci. Technol. A 32, 021305 (2014)
https://doi.org/10.1116/1.4862547
Published: January 2014
View article titled, Fabrication of tapered graded-refractive-index micropillars using ion-implanted-photoresist as an etch mask
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Journal Articles

GaInN light-emitting diodes using separate epitaxial growth for the p-type region to attain polarization-inverted electron-blocking layer, reduced electron leakage, and improved hole injection

David S. Meyaard, Guan-Bo Lin, Ming Ma, Jaehee Cho, E. Fred Schubert, Sang-Heon Han, Min-Ho Kim, HyunWook Shim, Young Sun Kim
Journal: Applied Physics Letters
Appl. Phys. Lett. 103, 201112 (2013)
https://doi.org/10.1063/1.4829576
Published: November 2013
View article titled, GaInN light-emitting diodes using separate epitaxial growth for the p-type region to attain polarization-inverted electron-blocking layer, reduced electron leakage, and improved hole injection
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Journal Articles

Analysis of the temperature dependence of the forward voltage characteristics of GaInN light-emitting diodes

David S. Meyaard, Jaehee Cho, E. Fred Schubert, Sang-Heon Han, Min-Ho Kim, Cheolsoo Sone
Journal: Applied Physics Letters
Appl. Phys. Lett. 103, 121103 (2013)
https://doi.org/10.1063/1.4821538
Published: September 2013
View article titled, Analysis of the temperature dependence of the forward voltage characteristics of GaInN light-emitting diodes
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Journal Articles

Enhanced overall efficiency of GaInN-based light-emitting diodes with reduced efficiency droop by Al-composition-graded AlGaN/GaN superlattice electron blocking layer

Jun Hyuk Park, Dong Yeong Kim, Sunyong Hwang, David Meyaard, E. Fred Schubert, Yu Dae Han, Joo Won Choi, Jaehee Cho, Jong Kyu Kim
Journal: Applied Physics Letters
Appl. Phys. Lett. 103, 061104 (2013)
https://doi.org/10.1063/1.4817800
Published: August 2013
View article titled, Enhanced overall efficiency of GaInN-based light-emitting diodes with reduced efficiency droop by Al-composition-graded AlGaN/GaN superlattice electron blocking layer
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Journal Articles

Identifying the cause of the efficiency droop in GaInN light-emitting diodes by correlating the onset of high injection with the onset of the efficiency droop

David S. Meyaard, Guan-Bo Lin, Jaehee Cho, E. Fred Schubert, Hyunwook Shim, Sang-Heon Han, Min-Ho Kim, Cheolsoo Sone, Young Sun Kim
Journal: Applied Physics Letters
Appl. Phys. Lett. 102, 251114 (2013)
https://doi.org/10.1063/1.4811558
Published: June 2013
View article titled, Identifying the cause of the efficiency droop in GaInN light-emitting diodes by correlating the onset of high injection with the onset of the efficiency droop
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Journal Articles

Method for determining the radiative efficiency of GaInN quantum wells based on the width of efficiency-versus-carrier-concentration curve

Guan-Bo Lin, Qifeng Shan, Andrew J. Birkel, Jaehee Cho, E. Fred Schubert, Mary H. Crawford, Karl R. Westlake, Daniel D. Koleske
Journal: Applied Physics Letters
Appl. Phys. Lett. 101, 241104 (2012)
https://doi.org/10.1063/1.4770317
Published: December 2012
View article titled, Method for determining the radiative efficiency of GaInN quantum wells based on the width of efficiency-versus-carrier-concentration curve
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Journal Articles

Analysis of parasitic cyan luminescence occurring in GaInN blue light-emitting diodes

Qifeng Shan, Yong Suk Cho, Guan-Bo Lin, David S. Meyaard, Jaehee Cho, E. Fred Schubert, Joong Kon Son, Cheolsoo Sone
Journal: Journal of Applied Physics
J. Appl. Phys. 112, 074512 (2012)
https://doi.org/10.1063/1.4754829
Published: October 2012
View article titled, Analysis of parasitic cyan luminescence occurring in GaInN blue light-emitting diodes
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Journal Articles

Strong light-extraction enhancement in GaInN light-emitting diodes patterned with TiO2 micro-pillars with tapered sidewalls

Ming Ma, Jaehee Cho, E. Fred Schubert, Yongjo Park, Gi Bum Kim, Cheolsoo Sone
Journal: Applied Physics Letters
Appl. Phys. Lett. 101, 141105 (2012)
https://doi.org/10.1063/1.4756797
Published: October 2012
View article titled, Strong light-extraction enhancement in GaInN light-emitting diodes patterned with TiO<sub>2</sub> micro-pillars with tapered sidewalls
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Journal Articles

Polarized light emission from GaInN light-emitting diodes embedded with subwavelength aluminum wire-grid polarizers

Ming Ma, David S. Meyaard, Qifeng Shan, Jaehee Cho, E. Fred Schubert, Gi Bum Kim, Min-Ho Kim, Cheolsoo Sone
Journal: Applied Physics Letters
Appl. Phys. Lett. 101, 061103 (2012)
https://doi.org/10.1063/1.4744422
Published: August 2012
View article titled, Polarized light emission from GaInN light-emitting diodes embedded with subwavelength aluminum wire-grid polarizers
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Journal Articles

Analytic model for the efficiency droop in semiconductors with asymmetric carrier-transport properties based on drift-induced reduction of injection efficiency

Guan-Bo Lin, David Meyaard, Jaehee Cho, E. Fred Schubert, Hyunwook Shim, Cheolsoo Sone
Journal: Applied Physics Letters
Appl. Phys. Lett. 100, 161106 (2012)
https://doi.org/10.1063/1.4704366
Published: April 2012
View article titled, Analytic model for the efficiency droop in semiconductors with asymmetric carrier-transport properties based on drift-induced reduction of injection efficiency
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Journal Articles

Efficiency droop in AlGaInP and GaInN light-emitting diodes

Jong-In Shim, Dong-Pyo Han, Hyunsung Kim, Dong-Soo Shin, Guan-Bo Lin, David S. Meyaard, Qifeng Shan, Jaehee Cho, E. Fred Schubert, Hyunwook Shim, Cheolsoo Sone
Journal: Applied Physics Letters
Appl. Phys. Lett. 100, 111106 (2012)
https://doi.org/10.1063/1.3694044
Published: March 2012
View article titled, Efficiency droop in AlGaInP and GaInN light-emitting diodes
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