期刊
OPTICS EXPRESS
卷 25, 期 8, 页码 A432-A443出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.25.00A432
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资金
- National Natural Science Foundation of China (NSFC) [U1401249, 51405161]
- Science and Technology Program of Guangdong Province [2014B010121002]
- Fundamental Research Funds for the Central Universities
- Natural Science Foundation of Guangdong Province [2014A30312017]
White light produced by blue LEDs with yellow phosphor is the most widely used methods, but it results in poor quality in angular CCT uniformity. In this work, a novel technique was introduced to solve this problem by integrating different ZnO nanostructures into white light-emitting diodes. The experiment of ZnO doped films and the simulation of Finite-Difference Time-Domain (FDTD) were carried out. The result indicated scattering effect of ZnO nanoparticles could improve uniformity of scattering energy effectively. Moreover, the effect of ZnO nanostructures on white light-emitting diodes (wLEDs) devices was also investigated. The CCT deviation of wLEDs devices would decrease from 3455.49 K to 96.30 K, 40.03 K and 60.09 K when the node-like (N-ZnO), sheet-like (S-ZnO) and rod-like ZnO (R-ZnO) respectively applied. The higher CCT uniformity and little luminous flux dropping were achieved when the optimal concentrations of N-ZnO, S-ZnO, and R-ZnO nanostructures were 0.25%, 0.75%, and 0.25%. This low-cost and green manufacturing method has a great impact on development of white light-emitting diodes. (C) 2017 Optical Society of America
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