Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 20, Pages 11242-11246Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202101868
Keywords
crystal growth; crystal orientation; drop-casting; humidity; perovskite solar cells
Categories
Funding
- National Key Research and Development Program of China [2017YFA0206600]
- National Natural Science Foundation of China [51773045, 21772030, 51922032, 21961160720]
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Drop-casting was used to prepare MAPbI(3) films for solar cells, with crystal growth orientation being temperature-dependent. The method shows better tolerance to humidity compared to spin-coating, and the resulting MAPbI(3) solar cells achieved a high PCE under high humidity conditions without antisolvent assistance.
Drop-casting was used to make MAPbI(3) films for solar cells. The crystal growth in drop-cast MAPbI(3) films was regulated by adjusting temperature. A mechanism for the formation of different morphology was proposed by combining in situ crystal-growth study with XRD measurements. The crystals in the films made at low temperature (60 degrees C) and high temperature (>= 120 degrees C) are (110) and (200) oriented, respectively. The different crystal growth mode leads to quite different film morphology. Compared with spin-coating, drop-casting shows much better tolerance to humidity. MAPbI(3) solar cells made under 88 % humidity delivered a PCE of 18.17 %, which is the highest PCE for perovskite solar cells made under >70 % humidity without antisolvent assistance.
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