DataVXJournal of Information DisplayPaper
journal article·2023-01-02Open access

Application of optical property-enhancement film to improve efficiency and suppress angle dependence of top-emitting organic light-emitting diodes

Baeksang Sung, Chul Woong Joo, Jun Chang Yang, Akpeko Gasonoo, Seung Wan Woo, Jae-Hyun Lee, Steve Park, Jonghee Lee

Journal of Information Display· Volume 24· Issue 1
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Source abstract

Abstract

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%.
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Research context

OpenAlex topics: Organic Light-Emitting Diodes Research · Organic Electronics and Photovoltaics · Conducting polymers and applications

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Affiliations

Department of Creative Convergence Engineering, Hanbat National University, Daejeon, Republic of Korea

Reality Display Research Section, Electronics and Telecommunications Research Institute (ETRI), Daejeon, Republic of Korea

SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon, Republic of Korea

Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, Republic of Korea

RIPE & 3D Printing, Hanbat National University, Daejeon, Republic of Korea

Funding

Basic Science Research Program · National Research Foundation of Korea · Ministry of Education · Electronics and Telecommunications Research Institute · Korean government

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