Zobrazeno 1 - 10
of 28
pro vyhledávání: '"Sun Kyung Kim"'
Publikováno v:
Optics express. 27(26)
We studied a high-accuracy hybrid optics modeling for macroscopic lighting devices containing highly diffractive elements. For a two-dimensional (2D) grating, we achieved forward and backward diffraction distributions at omnidirectional incidence by
Publikováno v:
Photonics and Nanostructures - Fundamentals and Applications. 27:42-48
We propose a systematic strategy that enables analysis of the outcoupling efficiency through each extraction route for two-dimensional (2D) patterned thin-film optical emitters with transparent substrates. Full-vectorial simulations combined with the
Autor:
Jin Young Na, Daesung Kang, Jae Seong Park, Dae Hyun Kim, Jae Ho Kim, Tae Yeon Seong, Sun Kyung Kim
Publikováno v:
Journal of Alloys and Compounds. 703:198-203
We developed hybrid Ag nanodots (NDs)/Ag nanowires (NWs) electrodes for enhancing the light output power of near ultraviolet (NUV) AlGaN-based light-emitting diodes (LEDs). At 385 nm, 10-nm-thick ITO-only films deposited on p-GaN/sapphire gave a tran
Publikováno v:
Microelectronic Engineering. 169:29-33
In this study, we introduced mesh-patterned Ag grid (width: 1520m) to enhance the light output power of near ultraviolet (385nm) AlGaN-based light emitting diode (LEDs). The Ag grid was intentionally agglomerated by annealing at 500C for 1min in air.
Autor:
Euijoon Yoon, Sun Kyung Kim
Publikováno v:
Light-Emitting Devices, Materials, and Applications.
Publikováno v:
Photonics and Nanostructures - Fundamentals and Applications. 43:100902
This study presents a hexagonal array of submicron hollow veins covered with a high-refractive-index (n) ceramic layer for extracting and steering light trapped in organic light-emitting diodes (LEDs). The hollow veins sustained by an ultrathin (35 n
Autor:
Sun Kyung Kim, Myunghoon Jung, Ki-Young Song, Daesung Kang, June O. Song, Hwan-Hee Jeong, Tae Yeon Seong, Da Som Kim, Eunsil Choi
Publikováno v:
ECS Journal of Solid State Science and Technology. 5:Q1-Q6
We investigated the effects of in situ GaN and sputtered AlN nucleation layers on the output power of GaN-based blue (445 nm) LEDs on patterned sapphire substrate (PSS) and planar sapphire substrates. Both the PSS LEDs and planar LEDs showed the same
Publikováno v:
Journal of the Korean Physical Society. 66:924-928
We studied morphological designs for enhanced light extraction from deep-ultraviolet AlGaN flip-chip light-emitting diodes with an absorptive p-type GaN layer. Ray tracing simulations were performed to investigate the dependence of the extraction eff
Autor:
Hong Gyu Park, Sun Kyung Kim
Publikováno v:
Journal of the Korean Physical Society. 64:471-475
We studied external and internal patterns for boosting light extraction from GaN light-emitting diodes (LEDs). With a transparent conductive layer (TCL) inserted between an external pattern and an upper GaN plane, light extraction increased in a thin
Autor:
Jae Ho Kim, Dae Hyun Kim, Jae Seong Park, Daesung Kang, Tae Yeon Seong, Sun Kyung Kim, Jun Yong Kim, Jin Young Na
Publikováno v:
Nanotechnology. 28(4)
Indium tin oxide (ITO) nanodots (NDs) were combined with Ag nanowires (Ag NWs) as a p-type electrode in near ultraviolet AlGaN-based light-emitting diodes (LEDs) to increase light output power. The Ag NWs were 30 ± 5 nm in diameter and 25 ± 5 μm i