Effect of Amorphous Photonic Structure Surface Mounted on Luminous Performances of White LED
Fei Huang,
Yiyong Chen,
Jingxin Nie,
Chunsheng Shen,
Jiulong Yuan,
Yukun Guo,
Boyan Dong,
Lu Liu,
Weihua Chen,
Zhizhong Chen,
Bo Shen
Affiliations
Fei Huang
Jiangsu Nuanyang Semiconductor Technology Co., Ltd., Sheyang 224300, China
Yiyong Chen
State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Jingxin Nie
State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Chunsheng Shen
Jiangsu Nuanyang Semiconductor Technology Co., Ltd., Sheyang 224300, China
Jiulong Yuan
Jiangsu Nuanyang Semiconductor Technology Co., Ltd., Sheyang 224300, China
Yukun Guo
Jiangsu Nuanyang Semiconductor Technology Co., Ltd., Sheyang 224300, China
Boyan Dong
State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Lu Liu
State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electrical Engineering and Computer Science, Peking University, Beijing 100871, China
Weihua Chen
State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
Zhizhong Chen
Jiangsu Nuanyang Semiconductor Technology Co., Ltd., Sheyang 224300, China
Bo Shen
State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, School of Physics, Peking University, Beijing 100871, China
We fabricated amorphous photonic structures (APSs) with different periods and hole diameters. The GaN-based white light emitting diodes (LEDs) at nominal correlated color temperatures (CCTs) of 5000 and 6000 K were surface mounted by these APSs. The electroluminescence (EL) measurements showed less luminous efficiency (LE) and higher CCT than the ones of the virginal white LEDs. However, the LEs of many APS-mounted white LEDs increased compared to white the LEDs without APSs at the same CCTs. A finite-difference time-domain (FDTD) simulation was carried out on the ASPs surface-mounted white LEDs and bidirectional scattering distribution functions (BSDFs) of different emissions were transferred to a Monte Carlo ray tracing simulation. The simulated LEs and CCTs conformed well to the experimental ones. The effects of the blue emission transmission and phosphor concentration were simulated to predict the absolute LE enhancement methods for white LEDs. At last, the hopeful APSs for high Les’ general lighting were discussed.
