A high-performance self-powered broadband photodetector based on a CH3NH3PbI3 perovskite/ZnO nanorod array heterostructure

Jichao Yu, Xu Chen, Yi Wang, Hai Zhou, Mengni Xue, Yang Xu, Zhaosong Li, Cong Ye, Jun Zhang, Peter A. Van Aken, Peter D. Lund, Hao Wang*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

121 Citations (Scopus)
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Here we report a self-powered photodetector based on a ZnO/CH3NH3PbI3 heterojunction and a MoO3 hole-transport layer. The organolead iodide perovskite photodetector is sensitive to broadband wavelengths from the ultraviolet light to the entire visible light region (250-800 nm), showing a high photo-responsivity of 24.3 A W-1 and a high detectivity value of 3.56 × 1014 cm Hz1/2 W-1 at 500 nm without external bias voltage. Meanwhile, we found that the photodetective performances are closely related to the thickness of the MoO3 layer, which acts as a hole-transport layer and an electron-blocking layer and can effectively decrease the recombination of holes and electrons. Additionally, the as-fabricated photodetector exhibits good stability and only 9.3% photoelectric response current decay after a 3-month illumination test. The high detectivity and responsivity of such a ZnO nanorod/perovskite heterojunction are clearly demonstrated and should be widely applicable to other photoelectric detection devices.

Original languageEnglish
Pages (from-to)7302-7308
Number of pages7
JournalJournal of Materials Chemistry C
Issue number30
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed


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