In:
physica status solidi (a), Wiley, Vol. 220, No. 14 ( 2023-07)
Abstract:
Chemical bath deposition (CBD) is a widely used approach to deposit the tin oxide (SnO 2 ) electron transport layer (ETL) in the perovskite solar cell (PSC). However, the defect states in the CBD‐resulted SnO 2 ETLs limit the electron extraction/transport from the perovskite to the ETL and lead to poor PSC performance. Herein, ethylenediaminetetraacetic acid dipotassium (EDTA‐2K) is used as an additive in the CBD precursor of the SnO 2 ETL, which results in the chelation of Sn 2+ and EDTA during the hydrolysis process. This strategy decreases the concentration of free Sn 2+ in the precursor for hydrolysis and slows down the CBD process, thus attributes to the decreased surface defect states as well as the enhanced conductivity of the ETL. As a result, the EDTA‐2K additive makes the CBD SnO 2 ETL with efficient electron extraction and transporting capability. The champion device achieves a power conversion efficiency (PCE) of 21.87%, which is significantly higher than that of the pristine CBD SnO 2 ‐based device (20.25%). In addition, the device with an active area of 1.21 cm 2 achieves a high PCE of 19.23%. This strategy makes the CBD SnO 2 an excellent ETL candidate for the development of low‐cost and large‐scale PSCs.
Type of Medium:
Online Resource
ISSN:
1862-6300
,
1862-6319
DOI:
10.1002/pssa.v220.14
DOI:
10.1002/pssa.202200897
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
1481091-8
detail.hit.zdb_id:
208850-2
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