In:
Small, Wiley, Vol. 19, No. 39 ( 2023-09)
Kurzfassung:
Despite the optoelectronic similarities between tin and lead halide perovskites, the performance of tin‐based perovskite solar cells remains far behind, with the highest reported efficiency to date being ≈14%. This is highly correlated to the instability of tin halide perovskite, as well as the rapid crystallization behavior in perovskite film formation. In this work, l ‐Asparagine as a zwitterion plays a dual role in controlling the nucleation/crystallization process and improving the morphology of perovskite film. Furthermore, tin perovskites with l ‐Asparagine show more favorable energy‐level matching, enhancing the charge extraction and minimizing the charge recombination, leading to an enhanced power conversion efficiency of 13.31% (from 10.54% without l ‐Asparagine) with remarkable stability. These results are also in good agreement with the density functional theory calculations. This work not only provides a facile and efficient approach to controlling the crystallization and morphology of perovskite film but also offers guidelines for further improved performance of tin‐based perovskite electronic devices.
Materialart:
Online-Ressource
ISSN:
1613-6810
,
1613-6829
DOI:
10.1002/smll.202302418
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2023
ZDB Id:
2168935-0