In:
Small, Wiley, Vol. 19, No. 9 ( 2023-03)
Abstract:
About 10% efficient antimony selenosulfide (Sb 2 (S,Se) 3 ) solar cell is realized by using selenourea as a hydrothermal raw material to prepare absorber layers. However, tailoring the bandgap of hydrothermal‐based Sb 2 (S,Se) 3 film to the ideal bandgap (1.3–1.4 eV) using the selenourea for optimal efficiency is still a challenge. Moreover, the expensive selenourea dramatically increases the fabricating cost. Here, a straightforward one‐step hydrothermal method is developed to prepare high‐quality Sb 2 (S,Se) 3 films using a novel precursor sodium selenosulfate as the selenium source. By tuning the Se/(Se+S) ratio in the hydrothermal precursor solution, a series of high‐quality Sb 2 (S,Se) 3 films with reduced density of deep defect states and tunable bandgap from 1.31 to 1.71 eV is successfully prepared. Consequently, the best efficiency of 10.05% with a high current density of 26.01 mA cm −2 is achieved in 1.35 eV Sb 2 (S,Se) 3 solar cells. Compared with the traditional method using selenourea, the production cost for the Sb 2 (S,Se) 3 devices is reduced by over 80%. In addition, the device exhibits outstanding stability, maintaining more than 93% of the initial power conversion efficiency after 30 days of exposure in the atmosphere without encapsulation. The present work definitely paves a facile and effective way to develop low‐cost and high‐efficiency chalcogenide‐based photovoltaic devices.
Type of Medium:
Online Resource
ISSN:
1613-6810
,
1613-6829
DOI:
10.1002/smll.202206175
Language:
English
Publisher:
Wiley
Publication Date:
2023
detail.hit.zdb_id:
2168935-0
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