All‐inorganic halide perovskites (IHPs) are ideal candidates for optoelectronic devices with outstanding emission color saturation, well‐tunable optical bandgap, near‐unity photoluminescence quantum yield (PL QY), and excellent solution processability. They appear to be promising materials for next‐generation high‐efficiency, wide‐color‐gamut, and flexible ultrahigh‐definition (UHD) displays through the backlighting in liquid‐crystal displays and electroluminescent devices. Here, the optical superiority of IHP materials for UHD displays is analyzed and summarized. In addition, recent progress regarding displays containing backlighting, and electroluminescent devices based on IHPs with different dimensions is introduced. Furthermore, a brief outlook is also provided, which identifies the current existing main problems, corresponding possible solutions, and a vision for the future.

中文翻译：

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用于超高清显示器的高效纯色无机卤化物钙钛矿发射体：背光显示器和电驱动设备的进展

全无机卤化物钙钛矿（IHP）是具有出色的发射色饱和度，可调节的光学带隙，近统一的光致发光量子产率（PL QY）和出色的溶液可加工性的光电器件的理想候选产品。通过液晶显示器和电致发光设备中的背光，它们似乎是用于下一代高效，宽色域和柔性超高清（UHD）显示器的有前途的材料。在此，分析和总结了用于超高清显示器的IHP材料的光学优势。另外，介绍了关于包含背光的显示器和基于具有不同尺寸的IHP的电致发光器件的最新进展。此外，还提供了简短的展望，指出了当前存在的主要问题，