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Organic wavelength‐converting‐film‐based hybrid planar white light‐emitting diodes
Author(s) -
Kim Sung Wook,
Yoo Hyoung Sun,
Kwon ByoungHwa,
Kang Dong Seok,
Suh Minwon,
Jeon Duk Young
Publication year - 2010
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/jsid18.12.1104
Subject(s) - planar , materials science , optoelectronics , wavelength , coating , diode , light emitting diode , optics , nanotechnology , computer science , computer graphics (images) , physics
— In this study, organic wavelength‐converting films (WCFs) applied to InGaN blue LED‐based hybrid planar WLED has been fabricated. The organic dye layer in the WCF was formed between the upper and bottom polymer sheets by using a simple roll‐laminating technique. Subsequently, the hybrid planar WLEDs have been fabricated based upon these films. The luminous efficiency of green WCF‐based hybrid planar WLEDs with a single blue LED chip was 34.6 lm/W and that of red‐WCF‐assisted green WCF‐based hybrid planar WLEDs was 27.3 lm/W under 20 mA. The use of WCF to fabricate hybrid planar WLEDs showed better stability than that of directly coating organic color‐convergence materials (CCMs) on the LED chips. It only decreased to about 10% of the initial wavelength‐converting intensity after 1 hour of continual operation at 20 mA.