Filterless narrowband visible photodetectors
Filterless narrowband visible photodetectors
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DOI：
10.1038/nphoton.2015.175
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发表时间：
2015-10-01
期刊：
影响因子：
35
通讯作者：
Meredith, Paul
中科院分区：
文献类型：
--
作者：
Lin, Qianqian;Armin, Ardalan;Meredith, Paul
波长选择性光检测对于许多应用至关重要，包括成像和机器视觉。窄带光谱响应是颜色辨别所必需的，并且当前的系统使用宽带光电二极管与光学滤波器相结合。这种方法增加了架构的复杂性，并限制了颜色感测的质量。在这里，我们报告了一种调谐光谱响应的方法，使无滤波器，窄带红色，绿色和蓝色光电二极管。该器件具有简单的平面结结构，其中光活性层是有机卤化物钙钛矿或卤化铅半导体和有机（大）分子的溶液处理的混合物。有机（大）分子改变光电二极管的光学和电学性质，并促进电荷收集，使器件的外部量子效率变窄。这些红色、绿色和蓝色光电二极管都具有半峰全宽，
Wavelength-selective light detection is crucial for many applications, including imaging and machine vision. Narrowband spectral responses are required for colour discrimination, and current systems use broadband photodiodes combined with optical filters. This approach increases the architectural complexity and limits the quality of colour sensing. Here we report a method for tuning the spectral response to give filterless, narrowband red, green and blue photodiodes. The devices have simple planar junction architectures with the photoactive layer being a solution-processed mixture of either an organohalide perovskite or lead halide semiconductor and an organic (macro) molecule. The organic (macro) molecules modify the optical and electrical properties of the photodiode and facilitate charge collection narrowing of the device's external quantum efficiency. These red, green and blue photodiodes all possess full-width at half-maxima of