Carbonized polymer dots enhanced stability and flexibility of quasi-2D perovskite photodetector

Mingrui Tan; Mingbian Li; Wanting Pan; Xiaopeng Feng; Yuhong He; Junjun Liu; Fengxia Dong; Haotong Wei; Bai Yang

doi:10.1038/s41377-022-01000-6

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Carbonized polymer dots enhanced stability and flexibility of quasi-2D perovskite photodetector

Original Articles

- Carbonized polymer dots enhanced stability and flexibility of quasi-2D perovskite photodetector
- Light: Science & Applications Vol. 11, Issue 11, Pages: 2716-2724(2022)
- Affiliations：
  
  1.State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 130012, Changchun, China
  2.Optical Functional Theranostics Joint Laboratory of Medicine and Chemistry, The First Hospital of Jilin University, 130012, Changchun, China
- Author bio：
  
  Haotong Wei (hweichem@jlu.edu.cn)
- Funds：
- DOI：10.1038/s41377-022-01000-6
  CLC：
- Published：30 November 2022，
  
  Published Online：18 October 2022，
  
  Received：16 June 2022，
  
  Revised：26 September 2022，
  
  Accepted：30 September 2022
- Accepted：
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Tan, M. R. et al. Carbonized polymer dots enhanced stability and flexibility of quasi-2D perovskite photodetector. Light: Science & Applications, 11, 2716-2724 (2022).
DOI：

Tan, M. R. et al. Carbonized polymer dots enhanced stability and flexibility of quasi-2D perovskite photodetector. Light: Science & Applications, 11, 2716-2724 (2022). DOI： 10.1038/s41377-022-01000-6.

摘要

Abstract

Quasi-2D perovskites have been demonstrated to be competitive materials in the photodetection fields due to the enhanced moisture stability by large organic cations. However

as the increasing demands of modern technology

it is still challenging to combine the flexibility with the capability of weak light detection in a low-cost way. Here

amides

carboxylic acids

and anhydrides groups-rich carbonized polymer dots (CPDs) were employed to fill in the perovskite grain boundaries

which can passivate the point defects of perovskite by coordinating with the unbonded Pb atoms

and reduce the leakage current. Weak light detection capability was demonstrated by directly resolving light with an intensity of 10.1 pW cm

−2

. More importantly

the stretchable polymer chains on CPDs strongly interact with perovskite ions through multiple supramolecular interactions

and extend the stretchable properties to the perovskite/CPDs composites

which can maintain the integral structure stability during the deformation of perovskite crystals and restricted any crack by releasing the film strain. Our fabricated devices show extraordinary flexible stability in the bending-dependent response tests. The viscoelasticity of CPDs improves the bending stability of the flexible quasi-2D perovskite photodetectors

and device performance shows no degradation after bending 10000 times

comparable or even outperforming the dominating flexible photodetectors.

关键词

Keywords

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