Ambipolar solution-processed hybrid perovskite phototransistors

作者：Li, Feng^*; Ma, Chun; Wang, Hong; Hu, Weijin; Yu, Weili; Sheikh, Arif D.; Wu, Tom

来源：Nature Communications, 2015, 6(1): 8238.

DOI：10.1038/ncomms9238

• FIELD-EFFECT TRANSISTORS
• SOLAR-CELLS
• HALIDE PEROVSKITES
• HIGH-GAIN
• PERFORMANCE
• PHOTODETECTORS
• TRANSPORT
• MOBILITIES
• ELECTRON
• PHOTOLUMINESCENCE

Organolead halide perovskites have attracted substantial attention because of 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) cm(2)V(-1)s(-1) for holes (electrons), which increase to 1.24 (1.01) cm(2)V(-1)s(-1) for mixed-halide perovskites. The photoresponsivity of our hybrid perovskite devices reaches 320 AW(-1), which is among the largest values reported for phototransistors. Importantly, the phototransistors exhibit an ultrafast photoresponse speed of less than 10 ms. The solution-based process and excellent device performance strongly underscore hybrid perovskites as promising material candidates for photoelectronic applications.

• 出版日期2015-9