4.7 Article

Reduction of intrinsic defects in hybrid perovskite films via precursor purification

Journal

CHEMICAL COMMUNICATIONS
Volume 53, Issue 76, Pages 10548-10551

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cc05590k

Keywords

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Funding

  1. National Key Research and Development Program of China [2016YFB0700700]
  2. National Natural Science Foundation of China [51672008, 51673025]
  3. Young Talent Thousand Program
  4. Enli Technology Co., Ltd.

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A simple chemical process was developed in a scalable manner, to reduce trap states in perovskite absorbers from the very beginning. The obvious decrease of I-2 in methylammonium iodide and the decrease of trap density in the resultant films were identified, which led to the power conversion efficiency (PCE) of perovskite solar cells (PSCs) increase from 16.5% to 18.5%.

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