標題: Bio-Inspired Flexible Fluoropolymer Film for All-Mode Light Extraction Enhancement
作者: Liang, Renli
Hu, Run
Long, Hanling
Huang, Xinyu
Dai, Jiangnan
Xu, Linlin
Ye, Lei
Zhai, Tianyou
Kuo, Hao-chung
Chen, Changqing
光電工程學系
光電工程研究所
Department of Photonics
Institute of EO Enginerring
關鍵字: deep ultraviolet light emitting diode;nanostructures;flexible fluoropolymer;light extraction efficiency;TE/TM mode
公開日期: 29-五月-2019
摘要: Enhancing the light extraction efficiency is a prevalent but vital challenge for most solid-state lighting technologies, especially for deep ultraviolet light-emitting diodes (DUV-LEDs). In this paper, inspired by the micro-structure of the butterfly's eye, we propose and fabricate a flexible fluoropolymer film (FFP film) to tackle this issue for all-mode, full-wavelength light extraction enhancement for most solid-state lighting technologies compatibly. The experimental results demonstrate that compared with one mounted with a smooth FFP film, the light output power of DUV-LED is enhanced up to 26.7% by mounting the FFP film with 325 nm radius nanocones at a driving current of 200 mA. Importantly, thanks to the super-flexible feature of the FFP film, it can both cover the top surface and sidewalls of the DUV-LED chip, leading to the improvement of transverse electric and transverse magnetic mode light extraction by 20.5 and 21.8%, respectively. Finite element analysis (FEA) simulations of the electric field distribution of DUV-LEDs with the FFP film reveal the underlying physics. The present strategy is proposed from the view of the packaging level, which is cost-effective, able to be manufactured at a large scale, and compatible with the solid-state lighting technologies.
URI: http://dx.doi.org/10.1021/acsami.9b02942
http://hdl.handle.net/11536/152410
ISSN: 1944-8244
DOI: 10.1021/acsami.9b02942
期刊: ACS APPLIED MATERIALS & INTERFACES
Volume: 11
Issue: 21
起始頁: 19623
結束頁: 19630
顯示於類別:期刊論文