Enabling low amounts of YAG:Ce3+ to convert blue into white light with plasmonic Au nanoparticles

Talib Hussain; Liubiao Zhong; Mohammad Danesh; Huiqi Ye; Ziqiang Liang; Dong Xiao; Cheng-Wei Qiu; Chaogang Lou; Lifeng Chi; Lin Jiang

doi:10.1039/C5NR01038A

Enabling low amounts of YAG:Ce³⁺ to convert blue into white light with plasmonic Au nanoparticles†

Talib Hussain,^abe Liubiao Zhong,^b Mohammad Danesh,^c Huiqi Ye,^a Ziqiang Liang,^b Dong Xiao,^a Cheng-Wei Qiu,^c Chaogang Lou,^d Lifeng Chi*^b and Lin Jiang*^b

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^a National Astronomical Observatories/Nanjing Institute of Astronomical Optics & Technology, Key Laboratory of Astronomical Optics & Technology, Nanjing Institute of Astronomical Optics & Technology, Chinese Academy of Sciences, Nanjing, Jiangsu, P. R. China

^b Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices & Collaborative Innovation Center of Suzhou Nano Science & Technology, Soochow University, Suzhou, Jiangsu 215123, P. R. China
E-mail: ljiang@suda.edu.cn, chilf@suda.edu.cn

^c Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576, Singapore

^d School of Electronic Science & Engineering, Southeast University, Nanjing, P.R. China

^e University of Chinese Academy of Sciences, Beijing, P. R. China

Abstract

We report a new strategy to directly attach Au nanoparticles onto YAG:Ce³⁺ phosphor via a chemical preparation method, which yields efficient and quality conversion of blue to yellow light in the presence of a low amount of phosphor. Photoluminescent intensity and quantum yield of YAG:Ce³⁺ phosphor are significantly enhanced after Au nanoparticle modification, which can be attributed to the strongly enhanced local surface electromagnetic field of Au nanoparticles on the phosphor particle surface. The CIE color coordinates shifted from the blue light (0.23, 0.23) to the white light region (0.30, 0.33) with a CCT value of 6601 K and a good white light CRI value of 78, which indicates that Au nanoparticles greatly improve the conversion efficiency of low amounts of YAG:Ce³⁺ in WLEDs.

Nanoscale

Enabling low amounts of YAG:Ce³⁺ to convert blue into white light with plasmonic Au nanoparticles†

Abstract

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Enabling low amounts of YAG:Ce³⁺ to convert blue into white light with plasmonic Au nanoparticles

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