Abstract In order to overcome the shortcomings of insufficient red light component and poor thermal stability of commercial white light emitting diode (WLED), YAG:Ce, R (R: Gd3+, Pr3+, Gd3+ and Pr3+) fluorescent thin films were prepared by pulse laser deposition (PLD). The composition and microstructure, photoluminescence properties, and red-enhanced mechanism of co-doped YAG fluorescent thin films, as well as the electroluminescence behavior of the corresponding WLEDs were investigated. Results showed that the doping of Pr3+ caused the emission spectrum energy of Ce3+ to migrate, and an emission peak appeared at 606 nm in the red region. The doping of Gd3+ caused the emission spectrum of Ce3+ to shift to the red region, and the main peak position of the Ce3+ emission spectrum is red-shifted from 523 nm to 548 nm. The YAG:Ce,Pr,Gd fluorescent film not only realized the improvement of red light components and red-shift, but also increased the energy transmission efficiency from 33.3% to 51.9%. Moreover, results of the color coordinate analysis also showed that the co-doping of Gd3+ and Pr3+ made the luminescence closer to the red region, reducing the color temperatures and hues changed to warm. Thus, tri-doped transparent fluorescent thin film were prospective for WLED application.

中文翻译：

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脉冲激光沉积制备的YAG：Ce、R（R：Gd3+、Pr3+、Gd3+和Pr3+）透明荧光薄膜的光谱光致发光特性

摘要 为克服商用白光发光二极管（WLED）红光成分不足、热稳定性差的缺点，采用脉冲激光制备了YAG:Ce、R（R：Gd3+、Pr3+、Gd3+和Pr3+）荧光薄膜。沉积（PLD）。研究了共掺杂 YAG 荧光薄膜的组成和微观结构、光致发光特性和红光增强机制，以及相应 WLED 的电致发光行为。结果表明，Pr3+的掺杂使Ce3+的发射光谱能量发生迁移，在红色区域606nm处出现发射峰。Gd3+的掺杂导致Ce3+的发射光谱向红区移动，Ce3+发射光谱的主峰位置从523nm红移到548nm。YAG:Ce,Pr, Gd荧光膜不仅实现了红光成分的改善和红移，而且将能量传输效率从33.3%提高到51.9%。此外，色坐标分析的结果还表明，Gd3+和Pr3+的共掺杂使发光更接近红色区域，降低了色温，色调变为暖色。因此，三掺杂透明荧光薄膜有望用于 WLED 应用。