Open AccessOptimization of nano-honeycomb structures for flexible w-LEDs
Author(s) -
HsiaoYi Lin,
Yung-Min Pai,
Jingxing Shi,
Xin-Yin Chen,
Chien-Chung Lin,
ChihMing Weng,
TzuYu Chen,
Chien-Chung Lin,
Martin D. B. Charlton,
YiPai Huang,
Chyong-Hua Chen,
HuangMing Philip Chen,
HaoChung Kuo
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.020466
Subject(s) - light emitting diode , materials science , phosphor , nano , optoelectronics , optics , luminous efficacy , fabrication , honeycomb , diode , led lamp , nanotechnology , layer (electronics) , composite material , medicine , physics , alternative medicine , pathology
This study presents the low cost fabrication of flexible white-light-emitting diodes (w-LEDs) with nano-honeycomb-structured phosphor films. Extending the dimensions of the nano-honeycomb structures improved the color uniformity of the flexible samples, and the 950-nm pattern sample demonstrated optimal color uniformity because this nano-pattern exhibited an excellent diffusion ability owing to its pitch size. In addition to color uniformity, the use of this nano-pattern improved the luminous efficiency. The 750-nm pattern exhibited the highest luminous efficiency (235.8 lm/W), which was approximately 7% higher than that exhibited by a non-patterned phosphor film sample. Thus, flexible w-LEDs with nano-honeycomb structure optimization have great potential to be used as next-generation lighting sources.