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Ultrasensitive broadband phototransistors based on perovskite/organic-semiconductor vertical heterojunctions.


ABSTRACT: Organolead halide perovskites have emerged as the most promising materials for various optoelectronic devices, especially solar cells, because of their excellent optoelectronic properties. Here, we present the first report of low-voltage high-gain phototransistors based on perovskite/organic-semiconductor vertical heterojunctions, which show ultrahigh responsivities of ~109A W-1 and specific detectivities of ~1014 Jones in a broadband region from the ultraviolet to the near infrared. The high sensitivity of the devices is attributed to a pronounced photogating effect that is mainly due to the long carrier lifetimes and strong light absorption in the perovskite material. In addition, flexible perovskite photodetectors have been successfully prepared via a solution process and show high sensitivity as well as excellent flexibility and bending durability. The high performance and facile solution-based fabrication of the perovskite/organic-semiconductor phototransistors indicate their promise for potential application for ultrasensitive broadband photodetection.

SUBMITTER: Xie C 

PROVIDER: S-EPMC6062319 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature

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Ultrasensitive broadband phototransistors based on perovskite/organic-semiconductor vertical heterojunctions.

Xie Chao C   You Peng P   Liu Zhike Z   Li Li L   Yan Feng F  

Light, science & applications 20170811 8


Organolead halide perovskites have emerged as the most promising materials for various optoelectronic devices, especially solar cells, because of their excellent optoelectronic properties. Here, we present the first report of low-voltage high-gain phototransistors based on perovskite/organic-semiconductor vertical heterojunctions, which show ultrahigh responsivities of ~10<sup>9</sup>A W<sup>-1</sup> and specific detectivities of ~10<sup>14</sup> Jones in a broadband region from the ultraviolet  ...[more]

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