Ambipolar solution-processed hybrid perovskite phototransistors

Feng Li, Chun Ma, Hong Wang, Weijin Hu, Weili Yu, Arif D. Sheikh, Tao Wu

Research output: Contribution to journalArticlepeer-review

548 Scopus citations


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) 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.
Original languageEnglish (US)
JournalNature Communications
Issue number1
StatePublished - Sep 8 2015

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KAUST Repository Item: Exported on 2020-10-01


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