Cs4PbBr6 crystals have been synthesized by an ultrasonication-assisted trace amount polar solvent method. The prepared green Cs4PbBr6 material was found to have high photoluminescence (PL) brightness and 10 ns PL lifetime. The prepared green light emitting device can achieve the maximum brightness of 3.8 × 109 cd/m2, which is nearly 100 times higher than a wick. The white light emitting device based on Cs4PbBr6 crystals has better performance than commercial products, which can cover 32.3% of the color gamut and achieves 107.3% coverage for International Commission on Illumination (CIE)1931 and 84.8% coverage for CIE1976.

中文翻译：

---

超声辅助微量溶剂合成超亮绿光Cs4PbBr6晶体

Cs4PbBr6 晶体已通过超声辅助痕量极性溶剂法合成。发现制备的绿色 Cs4PbBr6 材料具有高光致发光 (PL) 亮度和 10 ns PL 寿命。制备的绿光发光器件最高亮度可达3.8×109 cd/m2，比灯芯高近100倍。基于Cs4PbBr6晶体的白光发光器件性能优于市售产品，可覆盖32.3%的色域，达到国际照明委员会（CIE）1931的107.3%和CIE1976的84.8%的覆盖率。