Jump to main content
Jump to site search

Issue 6, 2018
Previous Article Next Article

Enhanced performance of perovskite/organic-semiconductor hybrid heterojunction photodetectors with the electron trapping effects

Author affiliations

Abstract

Hybrid photodetectors with extremely high responsivities and cost-effective fabrication processes are highly desirable for the development of a number of innovative technologies in our modern society. However, their wide applications are usually hindered by the slow photoresponse. In this work, we demonstrated that both responsivity and response speed of photodetectors based on perovskite/organic-semiconductor hybrid heterojunctions can be simultaneously improved upon coating of a layer of [6,6]-phenyl-C61-butyric acid methyl ester (PCBM). The resultant devices exhibited responsivity as high as 2.46 × 109 A W−1, representing a ∼44% increment, along with ∼5 times faster response speed over control photodetectors without PCBM. The improvement is attributed primarily to the significant electron trapping effect of PCBM, which not only facilitates efficient separation of photocarriers and suppresses their recombination, but also provides an extra built-in electric field to accelerate the drift of photocarriers. In addition, PCBM can passivate the perovskite to eliminate trap states on its surface and grain boundaries, which is also beneficial for device performance improvement. The results and analysis presented here are useful for not only performance optimization of hybrid photodetectors, but also better understanding their device physics.

Graphical abstract: Enhanced performance of perovskite/organic-semiconductor hybrid heterojunction photodetectors with the electron trapping effects

Back to tab navigation

Publication details

The article was received on 21 Nov 2017, accepted on 09 Jan 2018 and first published on 10 Jan 2018


Article type: Communication
DOI: 10.1039/C7TC05321E
Citation: J. Mater. Chem. C, 2018,6, 1338-1342
  •   Request permissions

    Enhanced performance of perovskite/organic-semiconductor hybrid heterojunction photodetectors with the electron trapping effects

    C. Xie and F. Yan, J. Mater. Chem. C, 2018, 6, 1338
    DOI: 10.1039/C7TC05321E

Search articles by author

Spotlight

Advertisements