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학술지 Improvement of Light Out-Coupling Efficiency in Organic Light-Emitting Diodes with Variable Nanopatterns
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저자
김정호, Joong-Yeon Cho, 박재훈, 이봉국, 백규하, 이헌, 도이미
발행일
201401
출처
Electronic Materials Letters, v.10 no.1, pp.27-29
ISSN
1738-8090
출판사
Springer, 대한금속재료학회
DOI
https://dx.doi.org/10.1007/s13391-013-3059-5
협약과제
13VC5400, 150ºC이하 인쇄기반 플렉세블 디스플에이 백플레인용 산화물 반도체, 절연체 잉크소재 및 공정 기술 개발, 도이미
초록
We present a viable method to enhance the current efficiency of organic light-emitting diodes (OLEDs) by imprinting cylindrical nanopatterns (NPs) onto a glass substrate. Herein, OLEDs equipped with an optimum NP array having a diameter of 300 nm and a periodic distance of 500 nm show a 33.4% improvement in current efficiency compared with a device without NPs. The light extraction efficiency of OLEDs was enhanced using a nanopatterned glass substrate, without any electrical degradation owing to the formation of NPs on opposite sides of the organic layers. In addition, top-emitting OLEDs can be fabricated easily by patterning the encapsulation glass. © 2014 The Korean Institute of Metals and Materials and Springer Science+Business Media Dordrecht.
키워드
imprint, nanopattern, OLED, outcoupling
KSP 제안 키워드
Glass substrate, Light outcoupling, Organic layers, Organic light-emitting diodes(OLEDS), Top-emitting OLEDs, current efficiency, electrical degradation, light extraction efficiency, light-emitting diode(LED), out-coupling efficiency