TY  - JOUR
PY  - 2015//
TI  - Enabling a blue-hazard free general lighting based on candle light-style OLED
JO  - Optics express
A1  - Jou, Jwo-Huei
A1  - Kumar, Sudhir
A1  - An, Chih-Chia
A1  - Singh, Meenu
A1  - Yu, Huei-Huan
A1  - Hsieh, Chun-Yu
A1  - Lin, You-Xing
A1  - Sung, Chao-Feng
A1  - Wang, Ching-Wu
SP  - A576
EP  - 81
VL  - 23
IS  - 11
N2  - Increasing studies report blue light to possess a potential hazard to the retina of human eyes, secretion of melatonin and artworks. To devise a human- and artwork-friendly light source and to also trigger a "Lighting Renaissance", we demonstrate here how to enable a quality, blue-hazard free general lighting source on the basis of low color-temperature organic light emitting diodes. With the use of multiple candlelight complementary emitters, the sensationally warm candle light-style emission is proven to be also drivable by electricity. To be energy-saving, highly efficient candle-light emission is demanded. The device shows, at 100 cd m<sup>-2</sup> for example, an efficacy of 85.4 lm W<sup>-1</sup>, an external quantum efficiency of 27.4%, with a 79 spectrum resemblance index and 2,279 K color temperature. The high efficiency may be attributed to the candlelight emitting dyes with a high quantum yield, and the host molecules facilitating an effective host-to-guest energy transfer, as well as effective carrier injection balance.<p />  <p>Language: en</p>
LA  - en
SN  - 1094-4087
UR  - http://dx.doi.org/
ID  - ref1
ER  -