논문 해외 국제전문학술지(SCI급) Enhancement of out-coupling efficiency of flexible organic light-emitting diodes fabricated on an MLA-patterned parylene substrate
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2019-08
- 저자명 이재현,이종희,HUSEYNOVA GUNEL,김아름
- 학술지명 ORGANIC ELECTRONICS
- 발행처명 ELSEVIER SCIENCE BV
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 4
홈페이지논문 초록 (Abstract)
Flexible organic light-emitting diodes (OLEDs) have attracted a great attention in the lighting market because of their exciting advantage to be fabricated as a freely shaped illumination source with no design restrictions. However, flexible OLEDs are difficult to commercialize due to their low power efficiency compared to fluorescent or inorganic light-emitting diodes. Accordingly, effective optical extraction techniques are needed to address this issue. In this study, we report development of a flexible OLED device fabricated on a poly-paraxylylene (parylene) substrate patterned with a micro-lens array (MLA). Ultra-thin parylene films were successfully applied as flexible polymer substrates for foldable OLEDs with enhanced out-coupling efficiency. It was confirmed that MLA-patterned parylene substrates do not have any negative impacts on the electrical properties of the OLEDs. On the contrary, the flexible OLEDs fabricated on these substrates for light extraction exhibited the current efficiency enhanced by a factor of 1.23 compared to the reference OLED. Thus, we present a simple and low-cost OLED fabrication method to enhance the light extraction out of flexible OLEDs.