http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Baeksang Sung (검색결과 6 건)
- 무료
- 기관 내 무료
- 유료
-
Sung Baeksang,Joo Chul Woong,Yang Jun Chang,Gasonoo Akpeko,Woo Seung Wan,Lee Jae-Hyun,Park Steve,Lee Jonghee 한국정보디스플레이학회 2023 Journal of information display Vol.24 No.1
In this paper, we propose the application of an optical property-enhancement film that complements the angular dependence and total reflection of top-emitting organic light-emitting diodes (TEOLEDs). The optical property-enhancement film is composed of a porous pyramid arrangement applied on a thin-film encapsulation layer of TEOLEDs and is applied to distribute the transmitted light evenly. The results confirm that the change in the electroluminescence spectrum for each angle was effectively reduced because the TEOLEDs demonstrated uniform light distribution. In addition, reducing the total internal reflection in the film structure made it possible to improve the external quantum efficiency by approximately 35% and current efficiency by 38%.
-
Island 표면구조의 P(VDF-TrFE) 몰드를 임프린트한 Spike 형태의 고투과성 외부광추출 필름
성백상(Baeksang Sung),조재혁(Jae-Hyeok Cho),임영지(Young-Ji Lim),Akpeko Gasonoo,이현아(Hyunah Lee),이장원(Jangwon Lee),우승완(Seungwan Woo),김동수(Dongsoo Kim),이재현(Jae-Hyun Lee),김민회(Min-Hoi Kim),이종희(Jonghee Lee) 한국전기전자학회 2021 전기전자학회논문지 Vol.25 No.2
본 연구에서는 열처리 후 Island 표면 구조를 가지는 고분자 Poly(vinylidenefluoride-co-trifluoroethylene) [P(VDF-TrFE)]를 사용하여 유기 발광 다이오드의 광추출 효율을 향상시키기 위한 방법을 제시하였다. Island 구조의 P(VDF-TrFE) 표면위에 임프린트한 polydimethylsiloxane (PDMS)는 Spike 구조를 띄고 이를 통해 전류 및 외부양자 효율을 약 20%을 향상시켰다. 제작된 필름은 8.2의 낮은 Haze특성을 보이며, 93.4% 우수한 투과도 특성으로 인해 Pixel blur 없이 광효율을 향상시킬 수 있음을 확인하였다. In this study, a method for improving the light extraction efficiency of organic light emitting diodes was presented using the polymer Poly(vinylidenefluoride-co-trifluoroethylene) [P(VDF-TrFE)] having an island surface structure after annealing. Polydimethylsiloxane (PDMS) imprinted on the island-structured P(VDF-TrFE) surface has a spike structure, which improves the external light extraction efficiency aroud 20%. It was confirmed that the produced film showed a low haze characteristic of 8.2, and the Current and external quantum efficiency could be improved without pixel blur due to the excellent transmittance of 93.4%.
-
리튬이차전지와 태양전지를 이용한 융합 디바이스 개발에 관한 연구
윤백상(Baeksang Yoon),정준호(Jungo Jeong),김상길(Sang-Gil Kim),김재국(Jaekuk Kim),권남(Nam Kwon),서인석(Inseok Seo) 한국전지학회 2021 한국전지학회지 Vol.1 No.2
본 논문에서 리튬이차전지와 실리콘 태양전지를 결합한 융합 디바이스 제조 및 특성평가 결과를 논의한다. 리튬이차전지의 양극활물질로는 Li(Ni0.8Co0.15Al0.05)O₂(NCA), 음극활물질로 Li₄Ti5O1₂를 사용하였다. 실리콘 태양전지를 이용하여 충방전을 진행하였을 때 리튬이차전지 사이클러로 충방전을 진행하였을 때와 유사한 거동을 보였다. 실리콘 태양전지와 리튬이차전지 융합 소자의 에너지 변환 및 저장 효율은 11.02%로 확인되었다. 결과적으로 실리콘 태양전지와 리튬이차전지의 융합에 있어 사용 가능함을 확인하였다. In this paper, development and characterization of lithium-ion battery(LIB) interconnected device using silicon solar cell were discussed. Li(Ni0.8Co0.15Al0.05)O₂(NCA) was used as the cathode active material and Li₄Ti5O1₂(LTO) was used as the anode active material. The NCA-LTO full cell showed a reasonable capacity retention and coulombic efficiency of 88.62% and 99.20% at 100 cycles, respectively. The fill factor of Si solar cell showed 0.738. The interconnected device showed a power conversion efficiency of 11.02%. Both the LIBSi solar cell device and LIB cell without Si solar cell (battery cycler charging) showed similar charge-discharge voltage profiles. As a result, it is possible that NCA-LTO with Si solar cell could be used in the field of interconnected device.
-
신규 용액공정 정공주입층 소재 Hexaazatrinaphthylene 유도체를 도입한 인광 유기전기발광소자
이장원(Jangwon Lee),성백상(Baeksang Sung),이승훈(Seung-Hoon Lee),유재민(Jae-Min Yoo),이재현(Jae-Hyun Lee),이종희(Jonghee Lee) 한국전기전자학회 2020 전기전자학회논문지 Vol.24 No.3
유기전기발광소자(Organic light diodes, OLEDs)의 전기발광특성을 향상시키기 위해, 본 논문에서는 용액 공정 정공주입층으로 신규 hexaazatrinaphthylene(HATNA) 유도체들을 도입한 고효율 녹색인광 OLED소자의 특성을 연구하였다. HATNA 유도체는 Indium Tin Oxide(ITO)의 일함수와 비슷한 낮은 the lowest unoccupied molecular orbital(LUMO) 에너지 준위를 가져 다른 개념의 정공주입 메커니즘을 보여주었다. HATNA 유도체를 hole injection layer(HIL)로 사용한 OLED소자들은 HTL로의 정공주입장벽을 효과적으로 감소시키고 발광층 내에 전자와 정공의 균형을 최적화 시켜 외부양자효율이 10.8%에서 15.6%로, 전류 효율은 34.3 cd/A에서 42.7 cd/A로 소자 효율이 크게 향상 되었다. To improve light-emitting performance of green phosphorescent organic light-emitting diodes (OLEDs), we introduced new hole injection materials-hexaazatrinaphthylene (HATNA) derivatives as a solution processed hole injection layer (HIL). The HATNA derivative has a low the lowest unoccupied molecular orbital (LUMO) energy level, similar to the work function of Indium Tin Oxide (ITO), showing a different concept of hole injection mechanism. It was confirmed that the device efficiency of OLEDs using HATNA-HIL showed the improved external quantum efficiency from 10.8% to 15.6% and current efficiency from 32.7 cd/A to 42.7 cd/A due to the balance of electrons and holes in the emissive layer.
-
Effect of the Hole Injection Layer Conductivity on the Performance of Polymer Light-Emitting Diodes
Gunel Huseynova,Jae-Min Yoo,Baeksang Sung,Seung-Hoon Lee,Jangwon Lee,Seung Wan Woo,Yong Hyun Kim,Jae-Hyun Lee,Jonghee Lee 대한금속·재료학회 2021 ELECTRONIC MATERIALS LETTERS Vol.17 No.4
In this study, a doped polymer hole injection layer (HIL) consisting of (3,4-ethylenedioxythiophene):poly(styrenesulfonate)PEDOT:PSS (AI4083), was employed to enhance the performance of organic light-emitting diodes (OLEDs) based on a solutionprocessedpolymer emissive layer. Highly conductive PEDOT:PSS (AI4083) was achieved using an organic small molecule,methyl red as a solution-processed dopant. The electrical conductivity of the polymer fi lms was enhanced by more than an orderof magnitude after doping compared to the pristine fi lms. The fabricated polymer OLEDs (PLEDs) with the doped PEDOT:PSS(AI4083) HILs displayed yellow emission at 550 nm with increased current and external quantum effi ciencies as well as twicethe luminance of the PLED with an undoped HIL. In addition, the turn-on voltage reduced from 3.8 to 3.5 V in the devices withthe doped HILs. This improved light-emitting characteristics originate from the increased conductivity of PEDOT:PSS (AI4083)that boosted its hole injection properties. Thus, our results show that the performance of PLEDs can be signifi cantly enhancedby simple modifi cation of the conductivity of polymer HILs using low-cost and solution-processed organic dopant molecules.
-
용액 공정 처리된 구리(I) 티오시아네이트(CuSCN) 필름의 정공 주입 특성 연구
장은정 ( Eun-jeong Jang ),성백상 ( Baeksang Sung ),권성민 ( Sungmin Kwon ),최윤석 ( Yoonseuk Choi ),이종희 ( Jonghee Lee ),이재현 ( Jae-hyun Lee ) 한국공업화학회 2024 공업화학 Vol.35 No.1
대면적 유기 발광 다이오드, 유기 태양 전지, 박막 트렌지스터의 정공 주입층으로써 CuSCN의 효과가 많이 입증되었다. 따라서 본 연구에서는 용액 공정 조건에 따라 CuSCN의 표면과 광학적, 전기적 분석을 하여 최적화된 필름의 조건을 제시하였다. 다양한 CuSCN 용액의 농도를 제작하여 필름 표면 특성을 확인하였고, 필름의 표면이 소자의 전기적 성능에 영향을 미치는지 확인하였다. CuSCN의 용액의 농도가 낮을 때는 CuSCN의 필름이 형성되지 않고 island 형태로 코팅되었고, 용액의 농도가 증가할수록 CuSCN의 필름이 균일하게 형성하였고 이는 소자의 전도도 향상에 기여하였다. 또한 hole only device를 제작하여 CuSCN의 정공 수송 층으로써의 역할을 입증하였다. The effectiveness of CuSCN as a hole injection layer in large-area organic light-emitting diodes, organic solar cells, and thin-film transistors has been well demonstrated. Therefore, in this study, the surface, optical, and electrical analyses of CuSCN were carried out according to the solution process conditions in order to propose optimized film conditions. Various CuSCN solution concentrations were prepared to determine the film surface characteristics and to determine whether the film surface affects the electrical performance of the device. When the CuSCN solution concentration was low, the CuSCN film was not formed and coated in the form of islands, and when the solution concentration was increased, the CuSCN film was formed uniformly, which contributed to improving the conductivity of the device. In addition, a hole-only device was fabricated to demonstrate the role of CuSCN as a hole transport layer.
ScienceON
DBpia연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
