Combining a single-component white-light phosphor with ultraviolet light emitting diode chips emerges as a promising method to produce white-light-emitting diodes (WLEDs). Nevertheless, it is still a challenge for synthesizing single-component white-light phosphors with a high color rendering index (CRI). Herein, Bi3+/Te4+ co-doped Cs2ZrCl6 perovskite white-light phosphor is presented with a high CRI of 91.7 and good stability against oxygen, water, and heat. The Cs2ZrCl6 microcrystals were prepared using an ultrasound-assisted hydrochloric acid method with controllable Bi3+ and Te4+ dopant contents. By manipulating the excitation wavelength, the emission light can be altered between cold and warm white. The Bi3+/Te4+ co-doped Cs2ZrCl6 phosphor can also emit the warm-white light, showing a high photoluminescence quantum yield of 82.9%. The presented Bi3+/Te4+ co-doped Cs2ZrCl6 perovskite phosphors with a high CRI and great environmental stability offer a new approach for the synthesis of single-phase white-light phosphors and have high potentiality for the application of WLEDs.

中文翻译：

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Bi3+/Te4+ 共掺杂 Cs2ZrCl6 钙钛矿荧光粉的可调谐冷/暖白光发射

将单组分白光荧光粉与紫外发光二极管芯片相结合成为生产白光发光二极管 (WLED) 的一种有前途的方法。尽管如此，合成具有高显色指数（CRI）的单组分白光荧光粉仍然是一个挑战。其中，Bi3+/Te4+共掺杂Cs2ZrCl6钙钛矿白光荧光粉具有91.7的高显色指数以及对氧、水和热的良好稳定性。采用超声辅助盐酸法制备了可控 Bi3+ 和 Te4+ 掺杂剂含量的 Cs2ZrCl6 微晶。通过操纵激发波长，发射光可以在冷白光和暖白光之间改变。 Bi3+/Te4+共掺杂Cs2ZrCl6荧光粉也能发出暖白光，表现出高达82.9%的光致发光量子产率。所提出的Bi3+/Te4+共掺杂Cs2ZrCl6钙钛矿荧光粉具有高显色指数和良好的环境稳定性，为单相白光荧光粉的合成提供了新的途径，并且在WLEDs中具有很大的应用潜力。