Energy-distinguishable bipolar UV photoelectron injection from LiCl-promoted FAPbCl3 perovskite nanorods

Jue Gong, Xun Li, Peijun Guo, Ian Zhang, Wei Huang, Ke Lu, Yingwen Cheng, Richard D. Schaller, Tobin J. Marks, Tao Xu

Research output: Contribution to journalArticle

Abstract

High-performance optoelectronic devices, such as solar cells and light-emitting diodes, have been fabricated with lead halide perovskites owing to their superior carrier properties. However, charge transport in such optoelectronics is intrinsically directional due to the existence of p-n junctions, which thus lacks the potential to elucidate any perturbations in light or electricity during energy conversion. Here, with the presence of a LiCl additive in a formamidinium chloride (FACl) solution, the as-grown LiCl:FAPbCl3 nanorods demonstrate greatly enhanced crystallinity and UV photoresponse as compared to pristine FAPbCl3 nanostructures without the LiCl additive. Most importantly, the LiCl:FAPbCl3 nanorod film exhibits unprecedented distinguishability to UV photons with different energies and oscillating intensities, in the form of bipolar and periodically oscillatory photocurrents. This work could advance the fundamental understanding of photoinduced carrier processes in halide perovskites and facilitate the development of novel UV-based optical communications.

Original languageEnglish
Pages (from-to)13043-13049
Number of pages7
JournalJournal of Materials Chemistry A
Volume7
Issue number21
DOIs
Publication statusPublished - Jan 1 2019

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ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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