Combining blue micro‐light‐emitting diodes (LEDs) with color conversion layers (CCLs) is a promising approach to develop efficient full‐color displays. However, no such practical display is reported so far potentially because of two major challenges, i.e., rarely available color conversion materials and severe crosstalk effect among adjacent pixels due to the thick sapphire substrates of LED chips. Here, a full‐color micro‐LED display prototype by combining rationally designed blue micro‐LEDs backlight with CsPbBr₃ perovskite and CdSe QDs as green and red CCLs, respectively, is presented. The color gamut of the fabricated display can reach as high as 129% of the National Television Standards Committee (NTSC). Notably, the color gamut can still reach 126% NTSC even when only green light is converted through perovskite CCL while the other two colors are achieved from conventional micro‐LEDs. This is the first demonstration on employing perovskite materials as CCL in full‐color micro‐LEDs display.

中文翻译：

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具有CsPbBr3钙钛矿和CdSe量子点作为颜色转换层的全彩色Micro-LED显示器

将蓝色微发光二极管（LED）与颜色转换层（CCL）结合使用是开发有效的全色显示器的一种有前途的方法。然而，由于两个主要挑战，即，由于LED芯片的蓝宝石衬底厚，因此很少有可用的颜色转换材料和相邻像素之间的严重串扰效应，到目前为止，尚未报道这种实用的显示器。在这里，将合理设计的蓝色micro-LED背光与CsPbBr ₃结合起来，形成全彩色micro-LED显示器原型钙钛矿和CdSe QD分别为绿色和红色CCL。制成的显示器的色域可以达到美国国家电视标准委员会（NTSC）的129％。值得注意的是，即使仅通过钙钛矿CCL转换绿光，而其他两种颜色是通过常规微型LED实现的，色域仍然可以达到126％NTSC。这是在全彩微型LED显示屏中采用钙钛矿材料作为CCL的首次演示。