In:
Advanced Materials, Wiley, Vol. 35, No. 21 ( 2023-05)
Abstract:
Further enhancing the operational lifetime of inverted‐structure perovskite solar cells (PSCs) is crucial for their commercialization, and the design of hole‐selective contacts at the illumination side plays a key role in operational stability. In this work, the self‐anchoring benzo[ rst ]pentaphene (SA‐BPP) is developed as a new type of hole‐selective contact toward long‐term operationally stable inverted PSCs. The SA‐BPP molecule with a graphene‐like conjugated structure shows a higher photostability and mobility than that of the frequently‐used triphenylamine and carbazole‐based hole‐selective molecules. Besides, the anchoring groups of SA‐BPP promote the formation of a large‐scale uniform hole contact on ITO substrate and efficiently passivate the perovskite absorbers. Benefiting from these merits, the champion efficiencies of 22.03% for the small‐sized cells and 17.08% for 5 × 5 cm 2 solar modules on an aperture area of 22.4 cm 2 are achieved based on this SA‐BPP contact. Also, the SA‐BPP‐based device exhibits promising operational stability, with an efficiency retention of 87.4% after 2000 h continuous operation at the maximum power point under simulated 1‐sun illumination, which indicates an estimated T 80 lifetime of 3175 h. This novel design concept of hole‐selective contacts provides a promising strategy for further improving the PSC stability.
Type of Medium:
Online Resource
ISSN:
0935-9648
,
1521-4095
DOI:
10.1002/adma.202300169
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
1474949-X
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