Self-Powered All-Inorganic Perovskite Microcrystal Photodetectors with High Detectivity.
Self-Powered All-Inorganic Perovskite Microcrystal Photodetectors with High Detectivity.
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DOI：
10.1021/acs.jpclett.8b00700
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发表时间：
2018-04
期刊：
影响因子：
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通讯作者：
Hai Zhou;Junpeng Zeng;Zhaoning Song;C. Grice;Cong Chen;Zehao Song;Dewei Zhao;Hao Wang;Yanfa Ya
中科院分区：
文献类型：
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作者：
Hai Zhou;Junpeng Zeng;Zhaoning Song;C. Grice;Cong Chen;Zehao Song;Dewei Zhao;Hao Wang;Yanfa Ya
有机-无机卤化铅钙钛矿微晶（MC）薄膜具有比多晶更低的陷阱态密度和更高的载流子迁移率，并且比单晶更适合于合成大横向面积的薄膜，是制备高性能大面积自供电光电探测器（PD）的理想材料。在这里，我们报告的自供电的所有无机CsPbBr 3钙钛矿MC PD的制造具有高探测率，使用改进的溶液合成方法。MC的尺寸可达约10 μm，MC层的厚度也约为11 μm。在473 nm激光（100 mW）照射下，CsPbBr 3 MC PD的响应率高达0.172 A W-1，探测率高达4.8 × 1012 Jones，开/关比高达1.3 × 105，线性动态范围高达113 dB。这些性能明显优于基于多晶钙钛矿薄膜的PD的性能，并且与基于钙钛矿单晶的PD的性能相当。
Organic-inorganic lead halide perovskite microcrystal (MC) films are attractive candidates for fabricating high-performance large-area self-powered photodetectors (PDs) because of their lower trap state density and higher carrier mobility than their polycrystalline counterparts and more suitability of synthesizing large lateral area films than their single-crystal counterparts. Here, we report on the fabrication of self-powered all-inorganic CsPbBr3 perovskite MC PDs with high detectivity, using a modified solution synthesis method. The MCs are up to about 10 μm in size, and the MC layer is also about 11 μm in thickness. Under 473 nm laser (100 mW) illumination, the CsPbBr3 MC PDs show responsivity values of up to 0.172 A W-1, detectivity values of up to 4.8 × 1012 Jones, on/off ratios of up to 1.3 × 105, and linear dynamic ranges of up to 113 dB. These performances are significantly better than those of PDs based on polycrystalline perovskite thin films and comparable with those of PDs based on perovskite single crystals.