双极型溶液工艺混合型Peroxide光电晶体管
Ambipolar Solution-processed Hybrid Perovskite Phototransistors
摘要：
有机铅卤化物钙钛矿由于其优异的物理性能而引起了人们的广泛关注，这使得它们能够在新兴的混合固态太阳能电池中用作活性物质。在这里，我们研究了基于混合钙钛矿薄膜的光电晶体管，并提供了直接的证据，其优越的载流子输运性能与双极性特性。室温下三碘钙钛矿的场效应迁移率测量为空穴（电子）的0.18（0.17）cm 2 V-1 s-1，对于混合卤化物钙钛矿，其增加到1.24（1.01）cm 2 V-1 s-1。我们的混合钙钛矿器件的光响应度达到320 A W-1，这是光电晶体管报道的最大值之一。重要的是，光电晶体管表现出小于10 μs的超快光响应速度。基于溶液的工艺和优异的器件性能强烈强调了混合钙钛矿作为光电应用的有前途的候选材料。
英文摘要：
Organolead halide perovskites have attracted substantial attention due to their excellent physical properties, which enable them to serve as the active material in emerging hybrid solid-state solar cells. Here we investigate the phototransistors based on hybrid perovskite films, and provide direct evidence for their superior carrier transport property with ambipolar characteristics. The field-effect mobilities for triiodide perovskites at room temperature are measured as 0.18 (0.17) cm2 V-1 s-1 for holes (electrons), which increase to 1.24 (1.01) cm2 V-1 s-1 for mixed halide perovskites. The photoresponsivity of our hybrid perovskite devices reaches 320 A W-1, which is among the largest values reported for phototransistors. Importantly, the phototransistors exhibit an ultrafast photoresponse speed of less than 10 μs. The solution-based process and excellent device performance strongly underscore hybrid perovskites as promising material candidates for photoelectronic applications.
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