Facile preparation and optical properties of Te/Pb-free Y3Al5O12:Ce3+ phosphor-in-glass via a screen-printing route for high-power WLEDs
| Autor: | Tongxiang Liang, Xueli Yang, Ruixiang Wang, Deng Yuan, Yuanying Yue, Weixiong You, Yijun Zhuang, Libin Xia, Chengyue Li |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Photoluminescence Materials science business.industry Phosphor 02 engineering and technology Color temperature 021001 nanoscience & nanotechnology 01 natural sciences Color rendering index 0103 physical sciences Screen printing Materials Chemistry Ceramics and Composites Optoelectronics Thermal stability Quantum efficiency 0210 nano-technology business Luminous efficacy |
| Zdroj: | Journal of the European Ceramic Society. 39:3848-3855 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2019.05.031 |
| Popis: | The applications in high-power fields of white light-emitting diodes (WLEDs) are restricted due to their poor thermal stability. Transparent Y3Al5O12:Ce3+ phosphor-in-glass (YAG-PiG) provides an efficient way to resolve this problem. In this work, novel transparent Te/Pb-free YAG-PiGs are successfully prepared via a facile screen-printing route. It is revealed that 5 mol% Eu2O3 optimizes the concentration in substrate glass. Slight erosion of YAG particles occurs in the as-prepared samples. With increasing YAG concentration and film thickness, the intensities of photoluminescence spectra of YAG-PiGs increase. The energy transfer from Eu3+ to Ce3+ is greatly suppressed. Superior thermal stability and high quantum efficiency are obtained. The optimal optical performance values in terms of a luminous efficiency of 117.2 lm/W, a correlated color temperature of 5859 K and a color rendering index of 77.2 are achieved in YAG-PiGs. All of the results reveal that the as-prepared YAG-PiGs are promising candidates for high-power WLEDs. |
| Databáze: | OpenAIRE |
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