2D materials for conducting holes from grain boundaries in perovskite solar cells

Peng You; Guanqi Tang; Jiupeng Cao; Dong Shen; Tsz-Wai Ng; Zafer Hawash; Naixiang Wang; Chun-Ki Liu; Wei Lu; Qidong Tai; Yabing Qi; Chun-Sing Lee; Feng Yan

doi:10.1038/s41377-021-00515-8

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2D materials for conducting holes from grain boundaries in perovskite solar cells

Articles

- 2D materials for conducting holes from grain boundaries in perovskite solar cells
- Light: Science & Applications Vol. 10, Issue 4, Pages: 695-706(2021)
- Affiliations：
  
  1.Department of Applied Physics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
  2.College of New Materials and New Energies, Shenzhen Technology University, 518118, Shenzhen, China
  3.Center of Super-Diamond and Advanced Films (COSDAF), Department of Chemistry, City University of Hong Kong, Hong Kong, China
  4.Energy Materials and Surface Sciences Unit (EMSSU), Okinawa Institute of Science and Technology Graduate University (OIST), 1919-1 Tancha, Onna-son, Okinawa, 904-0495, Japan
  5.University Research Facility in Materials Characterization and Device Fabrication, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
- Author bio：
  
  Feng Yan (apafyan@polyu.edu.hk)
- Funds：
- DOI：10.1038/s41377-021-00515-8
  CLC：
- Published：30 April 2021，
  
  Published Online：31 March 2021，
  
  Received：10 October 2020，
  
  Revised：01 March 2021，
  
  Accepted：15 March 2021
- Accepted：
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You, P. et al. 2D materials for conducting holes from grain boundaries in perovskite solar cells. Light: Science & Applications, 10, 695-706 (2021).
DOI：

You, P. et al. 2D materials for conducting holes from grain boundaries in perovskite solar cells. Light: Science & Applications, 10, 695-706 (2021). DOI： 10.1038/s41377-021-00515-8.

摘要

Abstract

Grain boundaries in organic–inorganic halide perovskite solar cells (PSCs) have been found to be detrimental to the photovoltaic performance of devices. Here

we develop a unique approach to overcome this problem by modifying the edges of perovskite grain boundaries with flakes of high-mobility two-dimensional (2D) materials via a convenient solution process. A synergistic effect between the 2D flakes and perovskite grain boundaries is observed for the first time

which can significantly enhance the performance of PSCs. We find that the 2D flakes can conduct holes from the grain boundaries to the hole transport layers in PSCs

thereby making hole channels in the grain boundaries of the devices. Hence

2D flakes with high carrier mobilities and short distances to grain boundaries can induce a more pronounced performance enhancement of the devices. This work presents a cost-effective strategy for improving the performance of PSCs by using high-mobility 2D materials.

关键词

Keywords

references

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