Yongjo Park : rechercher sur Z-Library

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1

Improved performance of AlGaN-based deep ultraviolet light-emitting diodes with nano-patterned AlN/sapphire substrates

Lee, Donghyun, Lee, Jong Won, Jang, Jeonghwan, Shin, In-Su, Jin, Lu, Park, Jun Hyuk, Kim, Jungsub, Lee, Jinsub, Noh, Hye-Seok, Kim, Yong-Il, Park, Youngsoo, Lee, Gun-Do, Park, Yongjo, Kim, Jong Kyu, Y

Journal:

Applied Physics Letters

Année:

2017

Langue:

english

Fichier:

PDF, 1.36 MB

english, 2017

2

660-nm GaInP-AlGaInP quantum-well laser diode structures with reduced vertical beam divergence angle

Soohaeng Cho, Yongjo Park, Youngmin Kim

Journal:

IEEE Photonics Technology Letters

Année:

2005

Langue:

english

Fichier:

PDF, 135 KB

english, 2005

3

High-power 660-nm GaInP-AlGaInP laser diodes with low vertical beam divergence angles

Byungjin Ma, Soohaeng Cho, Changyoun Lee, Youngmin Kim, Yongjo Park

Journal:

IEEE Photonics Technology Letters

Année:

2005

Langue:

english

Fichier:

PDF, 285 KB

english, 2005

4

Reduction in efficiency droop, forward voltage, ideality factor, and wavelength shift in polarization-matched GaInN/GaInN multi-quantum-well light-emitting diodes

Xu, Jiuru, Schubert, Martin F., Noemaun, Ahmed N., Zhu, Di, Kim, Jong Kyu, Schubert, E. Fred, Kim, Min Ho, Chung, Hun Jae, Yoon, Sukho, Sone, Cheolsoo, Park, Yongjo

Journal:

Applied Physics Letters

Année:

2009

Langue:

english

Fichier:

PDF, 754 KB

english, 2009

5

A Measurement of Modal Gain Profile and Its Effect on the Lasing Performance in Vertical-External-Cavity Surface-Emitting Lasers

Jun-Youn Kim, Soohaeng Cho, Junho Lee, Gi Bum Kim, Seong-Jin Lim, Jaeryung Yoo, Ki-Sung Kim, Sang-Moon Lee, Jongin Shim, Taek Kim, Yongjo Park

Journal:

IEEE Photonics Technology Letters

Année:

2006

Langue:

english

Fichier:

PDF, 202 KB

english, 2006

6

High-Reflectance and Thermally Stable AgCu Alloy p-Type Reflectors for GaN-Based Light-Emitting Diodes

Hyunsoo Kim, Kwang Hyeon Baik, Jaehee Cho, Jeong Wook Lee, Sukho Yoon, Hyungkun Kim, Sung-Nam Lee, Cheolsoo Sone, Yongjo Park, Tae-Yeon Seong

Journal:

IEEE Photonics Technology Letters

Année:

2007

Langue:

english

Fichier:

PDF, 314 KB

english, 2007

7

Compact and Efficient Green VECSEL Based on Novel Optical End-Pumping Scheme

Soohaeng Cho, Gi Bum Kim, Jun-Youn Kim, Ki-Sung Kim, Sang-Moon Lee, Jaeryung Yoo, Taek Kim, Yongjo Park

Journal:

IEEE Photonics Technology Letters

Année:

2007

Langue:

english

Fichier:

PDF, 189 KB

english, 2007

8

920-nm Vertical-External-Cavity Surface-Emitting Lasers With a Slope Efficiency of 58% at Room Temperature

Ki-Sung Kim, Jaeryung Yoo, Gibum Kim, Sangmoon Lee, Soohaeng Cho, Junyoun Kim, Taek Kim, Yongjo Park

Journal:

IEEE Photonics Technology Letters

Année:

2007

Langue:

english

Fichier:

PDF, 179 KB

english, 2007

9

Enhancement of Pumping Efficiency in a Vertical-External-Cavity Surface-Emitting Laser

Ki-Sung Kim, Jaeryung Yoo, Gibum Kim, Sangmoon Lee, Soohaeng Cho, Junyoun Kim, Taek Kim, Yongjo Park

Journal:

IEEE Photonics Technology Letters

Année:

2007

Langue:

english

Fichier:

PDF, 142 KB

english, 2007

10

Efficient Alternating Current Operated White Light-Emitting Diode Chip

Onushkin, G.A., Young-Jin Lee, Jung-Ja Yang, Hyung-Kun Kim, Joong-Kon Son, Gil-Han Park, YongJo Park

Journal:

IEEE Photonics Technology Letters

Année:

2009

Langue:

english

Fichier:

PDF, 340 KB

english, 2009

11

Improved Emission Efficiency in InGaN Light-Emitting Diodes Using Reverse Bias in Pulsed Voltage Operation

Jaehee Cho, Euijoon Yoon, Hyunsoo Kim, Yongjo Park, Joon Seop Kwak

Journal:

IEEE Photonics Technology Letters

Année:

2008

Langue:

english

Fichier:

PDF, 211 KB

english, 2008

12

Origin of efficiency droop in GaN-based light-emitting diodes

Kim, Min-Ho, Schubert, Martin F., Dai, Qi, Kim, Jong Kyu, Schubert, E. Fred, Piprek, Joachim, Park, Yongjo

Journal:

Applied Physics Letters

Année:

2007

Langue:

english

Fichier:

PDF, 645 KB

english, 2007

13

GaInN light-emitting diode with conductive omnidirectional reflector having a low-refractive-index indium-tin oxide layer

Kim, Jong Kyu, Gessmann, Thomas, Schubert, E. Fred, Xi, J.-Q., Luo, Hong, Cho, Jaehee, Sone, Cheolsoo, Park, Yongjo

Journal:

Applied Physics Letters

Année:

2006

Langue:

english

Fichier:

PDF, 756 KB

english, 2006

14

Analysis of high-power packages for phosphor-based white-light-emitting diodes

Luo, Hong, Kim, Jong Kyu, Schubert, E. Fred, Cho, Jaehee, Sone, Cheolsoo, Park, Yongjo

Journal:

Applied Physics Letters

Année:

2005

Langue:

english

Fichier:

PDF, 626 KB

english, 2005

15

Ge surface-energy-driven secondary grain growth via two-step annealing

Lee, Sangsoo, Son, Yong-Hoon, Park, Yongjo, Hwang, Kihyun, Shin, Yoo Gyun, Yoon, Euijoon

Journal:

Thin Solid Films

Année:

2014

Langue:

english

Fichier:

PDF, 2.23 MB

english, 2014

16

Enhanced light-extraction in GaInN near-ultraviolet light-emitting diode with Al-based omnidirectional reflector having NiZn∕Ag microcontacts

Kim, Jong Kyu, Xi, J.-Q., Luo, Hong, Fred Schubert, E., Cho, Jaehee, Sone, Cheolsoo, Park, Yongjo

Journal:

Applied Physics Letters

Année:

2006

Langue:

english

Fichier:

PDF, 536 KB

english, 2006

17

Measurements of current spreading length and design of GaN-based light emitting diodes

Kim, Hyunsoo, Cho, Jaehee, Lee, Jeong Wook, Yoon, Sukho, Kim, Hyungkun, Sone, Cheolsoo, Park, Yongjo, Seong, Tae-Yeon

Journal:

Applied Physics Letters

Année:

2007

Langue:

english

Fichier:

PDF, 576 KB

english, 2007

18

[IEEE 2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference - Long Beach, CA, USA (2006.05.21-2006.05.26)] 2006 Conference on Lasers and Electro-Optics and 2006 Quantum Electronics and Laser Science Conference - Enhancement of light extraction in GaInN light-emitting diodes by conductive omni-directional reflectors

Jong Kyu Kim,, Xi, J.-Q., Luo, Hong, Schubert, E. Fred, Jaehee Cho,, Cheolsoo Sone,, Park, Yongjo

Année:

2006

Langue:

english

Fichier:

PDF, 504 KB

english, 2006

19

[IEEE 2016 IEEE International Solid-State Circuits Conference (ISSCC) - San Francisco, CA, USA (2016.1.31-2016.2.4)] 2016 IEEE International Solid-State Circuits Conference (ISSCC) - 19.3 A 2.4GHz 1.5mW digital MDLL using pulse-width comparator and double injection technique in 28nm CMOS

Kim, Hyunik, Kim, Yongjo, Kim, Taeik, Park, Hojin, Cho, SeongHwan

Année:

2016

Langue:

english

Fichier:

PDF, 1.50 MB

english, 2016

20

Epitaxial lateral overgrowth of GaN on nano-cavity patterned sapphire substrates

Lee, Donghyun, Lee, Seungmin, Kim, Giwoong, Kim, Jongmyeong, Jang, Jeonghwan, Oh, Jehong, Moon, Daeyoung, Park, Yongjo, Yoon, Euijoon

Journal:

Journal of Crystal Growth

Année:

2018

Langue:

english

Fichier:

PDF, 906 KB

english, 2018

21

74â2: Diffracted Image Retrieving with Deep Learning

Baek, Seungin, Koh, Eunkyung, Lee, Sang-Gu, Park, Byong-Ug, Yoo, Jewon, Kim, Daewook, Choi, Soojin, Son, Hyunjin, Cho, Hyunguk, Kim, Yongjo

Journal:

SID Symposium Digest of Technical Papers

Année:

2020

Fichier:

PDF, 1.12 MB

2020

22

MFM and Raman studies in PEMBE-grown (Ga,Mn)N thin films showing room-temperature ferromagnetism

Moon-Ho Ham, Sukho Yoon, Yongjo Park, Jae-Min Myoung

Journal:

Applied Surface Science

Année:

2006

Langue:

english

Fichier:

PDF, 137 KB

english, 2006

23

Correlations between photoluminescence and Hall mobility in GaN/sapphire grown by metalorganic chemical vapor deposition

In-Hwan Lee, Cheul-Ro Lee, Dong Chan Shin, Okhyun Nam, Yongjo Park

Journal:

Journal of Crystal Growth

Année:

2004

Langue:

english

Fichier:

PDF, 120 KB

english, 2004

24

Growth of In-rich InGaN/GaN quantum dots by metalorganic chemical vapor deposition

Hyun Jin Kim, Hyunseok Na, Soon-Yong Kwon, Hui-Chan Seo, Hee Jin Kim, Yoori Shin, Keon-Hun Lee, Dong Hyuk Kim, Hye Jeong Oh, Sukho Yoon, Cheolsoo Sone, Yongjo Park, Euijoon Yoon

Journal:

Journal of Crystal Growth

Année:

2004

Langue:

english

Fichier:

PDF, 344 KB

english, 2004

25

Observation of room-temperature ferromagnetism in (Al,Mn)N thin films

Moon-Ho Ham, Sukho Yoon, Yongjo Park, Jae-Min Myoung

Journal:

Journal of Crystal Growth

Année:

2004

Langue:

english

Fichier:

PDF, 199 KB

english, 2004

26

Investigation of optical and electrical properties of Mg-doped p-InxGa1−xN, p-GaN and p-AlyGa1−yN grown by MOCVD

Sung-Nam Lee, JoongKon Son, Tan Sakong, Wonseok Lee, Hosun Paek, Euijoon Yoon, Jiyoung Kim, Yong-Hoon Cho, Okhyun Nam, Yongjo Park

Journal:

Journal of Crystal Growth

Année:

2004

Langue:

english

Fichier:

PDF, 209 KB

english, 2004

27

Effect of thermal damage on optical and structural properties of In0.08Ga0.92N/In0.02Ga0.98N multi-quantum wells grown by MOCVD

Sung-Nam Lee, JoongKon Son, Hosun Paek, Tan Sakong, Wonseok Lee, Kihong Kim, Euijoon Yoon, Jiyoung Kim, Yong-Hoon Cho, YoonJae Lee, SangSoo Kim, DoYoung Noh, Okhyun Nam, Yongjo Park

Journal:

Journal of Crystal Growth

Année:

2005

Langue:

english

Fichier:

PDF, 400 KB

english, 2005

28

Efficient method and layer design for calibrating compositions and growth rates of AlGaInP layers in 660-nm laser diodes grown by MOCVD

Bumjoon Kim, Soohaeng Cho, Youngchul Shin, Donghoon Kang, Youngmin Kim, Yongjo Park

Journal:

Journal of Crystal Growth

Année:

2005

Langue:

english

Fichier:

PDF, 153 KB

english, 2005

29

Role of manganese in ferromagnetic (Al,Mn)N films

Moon-Ho Ham, Sukho Yoon, Yongjo Park, Jae-Min Myoung

Journal:

Solid State Communications

Année:

2006

Langue:

english

Fichier:

PDF, 123 KB

english, 2006

30

Growth of crack-free AlGaN film on high-temperature thin AlN interlayer

In-Hwan Lee, Tae Geun Kim, Yongjo Park

Journal:

Journal of Crystal Growth

Année:

2002

Langue:

english

Fichier:

PDF, 417 KB

english, 2002

31

Growth and optical properties of GaN on Si(1 1 1) substrates

In-Hwan Lee, S.J Lim, Yongjo Park

Journal:

Journal of Crystal Growth

Année:

2002

Langue:

english

Fichier:

PDF, 209 KB

english, 2002

32

Arsenic incorporation and growth mode of GaNAs grown by low-pressure metal-organic chemical vapor deposition

Hyunseok Na, Hyun Jin Kim, Euijoon Yoon, Cheolsoo Sone, Yongjo Park

Journal:

Journal of Crystal Growth

Année:

2003

Langue:

english

Fichier:

PDF, 246 KB

english, 2003

33

Characterization of optical and crystal qualities in InxGa1–xN/InyGa1–yN multi-quantum wells grown by MOCVD

Sung-Nam Lee, Tan Sakong, Wonseok Lee, Hosun Paek, Moonsuk Seon, In-Hwan Lee, Okhyun Nam, Yongjo Park

Journal:

Journal of Crystal Growth

Année:

2003

Langue:

english

Fichier:

PDF, 974 KB

english, 2003

34

Optical properties and recombination dynamics of InGaN/GaN multiple quantum wells with Si-doped barriers

Mee-Yi Ryu, Phil Won Yu, Eunsoon Oh, Chulsoo Sone, Okhyun Nam, Yongjo Park

Journal:

Solid State Communications

Année:

2001

Langue:

english

Fichier:

PDF, 409 KB

english, 2001

35

Optical properties of InGaN/GaN double quantum wells with varying well thickness

Mee-Yi Ryu, Gyu Gwang Shim, Phil Won Yu, Eunsoon Oh, Chulsoo Sone, Okhyun Nam, Yongjo Park

Journal:

Solid State Communications

Année:

2001

Langue:

english

Fichier:

PDF, 198 KB

english, 2001

36

Scanning tunneling microscopy characterization of metalorganic chemical vapor deposition grown GaN

Joachim Horna, Dimitris Pavlidis, Yongjo Park, Hans L. Hartnagel

Journal:

Materials Science and Engineering: B

Année:

1997

Langue:

english

Fichier:

PDF, 503 KB

english, 1997

37

Measuring the junction temperature of III-nitride light emitting diodes using electro-luminescence shift

Jaehee Cho, Cheolsoo Sone, Yongjo Park, Euijoon Yoon

Journal:

physica status solidi (a)

Année:

2005

Langue:

english

Fichier:

PDF, 93 KB

english, 2005

38

The growth of In-rich InGaN/GaN single quantum wells by metalorganic chemical vapor deposition

Hyun Jin Kim, Hyunseok Na, Soon-Yong Kwon, Hui-Chan Seo, Hee Jin Kim, Yoori Shin, Keon-Hun Lee, Young-Woon Kim, Sukho Yoon, Hye Jeong Oh, Cheolsoo Sone, Yongjo Park, Yong-Hoon Cho, Yuanping Sun, Euijo

Journal:

physica status solidi (c)

Année:

2003

Langue:

english

Fichier:

PDF, 188 KB

english, 2003

39

Effect of growth interruption on In-rich InGaN/GaN single quantum well structures

Soon-Yong Kwon, Hyun Jin Kim, Hyunseok Na, Hui–Chan Seo, Hee Jin Kim, Yoori Shin, Young-Woon Kim, Sukho Yoon, Hye Jeong Oh, Cheolsoo Sone, Yongjo Park, Yuanping Sun, Yong-Hoon Cho, Euijoon Yoon

Journal:

physica status solidi (c)

Année:

2003

Langue:

english

Fichier:

PDF, 214 KB

english, 2003

40

The formation of cubic GaNAs phase during the growth of thin GaNAs epilayers on GaN at low temperatures by metalorganic chemical vapor deposition

Hyunseok Na, Hyun Jin Kim, Soon-Yong Kwon, Cheolsoo Sone, Yongjo Park, Euijoon Yoon

Journal:

physica status solidi (c)

Année:

2004

Langue:

english

Fichier:

PDF, 616 KB

english, 2004

41

Simulation and fabrication of highly efficient InGaN-based LEDs with corrugated interface substrate

Jaehee Cho, Hyunsoo Kim, Hyungkun Kim, Jeong Wook Lee, Sukho Yoon, Cheolsoo Sone, Yongjo Park, Euijoon Yoon

Journal:

physica status solidi (c)

Année:

2005

Langue:

english

Fichier:

PDF, 133 KB

english, 2005

42

Effect of tensile strained InyGa1 − yAs spacer/barrier on the optical quality of compressive strained InxGa1 − xAs quantum well grown by metalorganic vapor-phase epitaxy

Oleg Laboutine, Ahngoo Choo, Seongheon Kim, Namhyun Kim, Hyeongsoo Park, Yongjo Park, Taeil Kim

Journal:

Journal of Crystal Growth

Année:

1997

Langue:

english

Fichier:

PDF, 553 KB

english, 1997

43

Characteristics of blue and ultraviolet light-emitting diodes with current density and temperature

Jaehee Cho, Euijoon Yoon, Yongjo Park, Woo Jin Ha, Jong Kyu Kim

Journal:

Electronic Materials Letters

Année:

2010

Langue:

english

Fichier:

PDF, 233 KB

english, 2010

44

Temperature-dependent contact resistivity of the nonalloyed ohmic contacts to p-GaN

Kwak, Joon Seop, Nam, Ok-Hyun, Park, Yongjo

Journal:

Journal of Applied Physics

Année:

2004

Langue:

english

Fichier:

PDF, 303 KB

english, 2004

45

Study of UV excited white light-emitting diodes for optimization of luminous efficiency and color rendering index

Jaehee Cho, Hyungkun Kim, Cheolsoo Sone, Yongjo Park, Young Sic Kim, Shunichi Kubota, Euijoon Yoon

Journal:

physica status solidi (RRL) - Rapid Research Letters

Année:

2009

Langue:

english

Fichier:

PDF, 278 KB

english, 2009

46

Partial Polarization Matching in GaInN-Based Multiple Quantum Well Blue LEDs Using Ternary GaInN Barriers for a Reduced Efficiency Droop

Min-Ho Kim, Wonseok Lee, Di Zhu, Schubert, M.F., Jong Kyu Kim, Schubert, E.F., Yongjo Park

Journal:

IEEE Journal of Selected Topics in Quantum Electronics

Année:

2009

Langue:

english

Fichier:

PDF, 563 KB

english, 2009

47

Consideration of the Actual Current-Spreading Length of GaN-Based Light-Emitting Diodes for High-Efficiency Design

Hyunsoo Kim, Jaehee Cho, Jeong Wook Lee, Sukho Yoon, Hyungkun Kim, Cheolsoo Sone, Yongjo Park, Tae-Yeon Seong

Journal:

IEEE Journal of Quantum Electronics

Année:

2007

Langue:

english

Fichier:

PDF, 1.44 MB

english, 2007

48

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

Ma, Ming, Cho, Jaehee, Fred Schubert, E., Park, Yongjo, Bum Kim, Gi, Sone, Cheolsoo

Journal:

Applied Physics Letters

Année:

2012

Langue:

english

Fichier:

PDF, 1001 KB

english, 2012

49

Leakage current origins and passivation effect of GaN-based light emitting diodes fabricated with Ag p-contacts

Kim, Hyunsoo, Cho, Jaehee, Park, Yongjo, Seong, Tae-Yeon

Journal:

Applied Physics Letters

Année:

2008

Langue:

english

Fichier:

PDF, 591 KB

english, 2008

50

Electrical characteristics of contacts to thin film N-polar n-type GaN

Kim, Hyunsoo, Ryou, Jae-Hyun, Dupuis, Russell D., Lee, Sung-Nam, Park, Yongjo, Jeon, Joon-Woo, Seong, Tae-Yeon

Journal:

Applied Physics Letters

Année:

2008

Langue:

english

Fichier:

PDF, 420 KB

english, 2008