Herein we demonstrate that solution-grown single crystals of semiconducting methylammonium lead halide perovskites (MAPbX₃, where MA=CH₃NH₃⁺, X=Cl⁻, Br⁻ and Br/I⁻) can be used as semiconductor absorbers for full-colour imaging. A one-pixel photodetector prototype was constructed by stacking three layers of blue-, green- and red-sensitive MAPbCl₃, MAPbBr₃ and MAPb(Br/I)₃ crystals, respectively. The prototype detector was demonstrated to recognize and faithfully reproduce coloured images by recombination of the signals from each individual colour channel. This layered structure concept, besides imparting a two- to three-fold reduction in the number of required pixels, also offers several other advantages over conventional technologies: three times more efficient light utilization (and thus higher sensitivity) than common Bayer scheme devices based on dissipative optical filters, colour moiré suppression and no need for de-mosaic image processing. In addition, the direct band gap structure of perovskites results in optical absorption that is several orders of magnitude greater than silicon. This opens a promising avenue towards the reduction of pixel-size in next-generation devices as compared with conventional silicon-based technologies.

本文我们证明半导体甲基铵卤化铅钙钛矿的该溶液生长的单晶（MAPbX ₃，其中MA = CH ₃ NH ₃ ⁺，X =氯^- ，溴^-和Br / I ^- ）可以被用作半导体吸收剂为全彩色成像。通过堆叠三层对蓝，绿和红敏感的MAPbCl ₃，MAPbBr ₃和MAPb（Br / I）₃构造一个单像素光电探测器原型晶体。原型检测器被证明可以通过重组来自每个单独色彩通道的信号来识别并忠实地再现彩色图像。这种分层结构的概念除了使所需像素的数量减少了2到3倍之外，还提供了比常规技术更多的其他优势：比基于以下技术的常见拜耳方案设备的光利用率高3倍（因此灵敏度也更高）。耗散的滤光片，抑制色纹，并且不需要去马赛克图像处理。另外，钙钛矿的直接带隙结构导致的光吸收比硅大几个数量级。