Flexible Ultrathin Single-Crystalline Perovskite Photodetector

Hao Jing, Ruwen Peng*, Ren Min Ma, Jie He, Yi Zhou, Zhenqian Yang, Cheng Yao Li, Yu Liu, Xiaojiao Guo, Yingying Zhu, Di Wang, Jing Su, Cheng Sun, Wenzhong Bao, Mu Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Flexible optoelectronic devices attract considerable attention due to their prominent role in creating novel wearable apparatus for bionics, robotics, health care, and so forth. Although bulk single-crystalline perovskite-based materials are well-recognized for the high photoelectric conversion efficiency than the polycrystalline ones, their stiff and brittle nature unfortunately prohibits their application for flexible devices. Here, we introduce ultrathin single-crystalline perovskite film as the active layer and demonstrate a high-performance flexible photodetector with prevailing bending reliability. With a much-reduced thickness of 20 nm, the photodetector made of this ultrathin film can achieve a significantly increased responsivity as 5600A/W, 2 orders of magnitude higher than that of recently reported flexible perovskite photodetectors. The demonstrated 0.2 MHz 3 dB bandwidth further paves the way for high-speed photodetection. Notably, all its optoelectronic characteristics resume after being bent over thousands of times. These results manifest the great potential of single-crystalline perovskite ultrathin films for developing wearable and flexible optoelectronic devices.

Original languageEnglish (US)
Pages (from-to)7144-7151
Number of pages8
JournalNano letters
Volume20
Issue number10
DOIs
StatePublished - Oct 14 2020

Keywords

  • Flexible photodetector
  • hybrid organic-inorganic perovskite
  • single-crystalline perovskite
  • ultrathin film

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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