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학술지 Effect of a P-doped Hole Transport and Charge Generation Layer on Single and Two-tandem Blue Top-emitting Organic Light-emitting Diodes
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저자
박재영, 이재현, 이종희, 조현수
발행일
202106
출처
Journal of Information Display, v.22 no.2, pp.107-113
ISSN
1598-0316
출판사
한국정보디스플레이학회
DOI
https://dx.doi.org/10.1080/15980316.2020.1863273
협약과제
20PB2200, 수평분자 배열 극대화를 이용한 고효율/장수명 청색발광 소재‧소자 기술개발, 조현수
초록
The transmittance of the p-doped hole transporting layer (p-HTL) and the charge generation layer (p-CGL) corresponding to the photoluminescence (PL) of blue dopants in an emitting layer decreases as the ratio of the p-dopant increases due to the absorption of the p-dopant. However, there was little difference in the luminous efficiency of blue top-emitting organic light-emitting diodes using p-HTL or p-CGL at a maximum doping ratio of 20%. p-HTL for a single structure required a 5% doping ratio to ensure sufficient electrical characteristics, but p-CGL for the two-stack tandem structure required more than a 10% doping ratio. The optical simulation showed that the device was affected by the specific absorbance of the p-dopant depending on the doping ratio and thickness. Although there was no significant difference in efficiency depending on the doping ratio at a thickness of 10 nm, the reduction rate of the external quantum efficiency increased from over 20 nm due to the doping ratio.
키워드
absorption, blue, charge generation layer, hole transport layer, p-doped, TEOLEDs
KSP 제안 키워드
20 nm, Charge generation layer, Doping ratio, External Quantum Efficiency, Hole transporting layer, Luminous efficiency, Optical simulation, Organic light-emitting diodes(OLEDS), P-doped, Reduction rate, Tandem structure
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저작자 표시 - 비영리 (CC BY NC)