TY - JOUR
T1 - Efficient and stable Ruddlesden-Popper layered tin-based perovskite solar cells enabled by ionic liquid-bulky spacers
AU - Qiu, Jian
AU - Lin, Yuexin
AU - Ran, Xueqin
AU - Wei, Qi
AU - Gao, Xingyu
AU - Xia, Yingdong
AU - Müller-Buschbaum, Peter
AU - Chen, Yonghua
N1 - Publisher Copyright:
© 2021, Science China Press and Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2021/9
Y1 - 2021/9
N2 - The crucial component, bulky spacers, in two-dimensional Ruddlesden-Popper (2DRP) layered tin (Sn) perovskites are highly limited by halide ammonium salts, leading to the insufficient control of complex crystallization process due to the limited interaction between bulky spacers and 2DRP perovskite frameworks. Here, we report an ionic liquid-bulky spacer, butylammounium acetate (BAAcO), for constructing efficient and stable 2DRP Sn-based perovskite solar cells (PSCs). In contrast to the traditional halide ammonium bulky spacer, butylammounium iodide (BAI), the AcO−-functional group in BAAcO has a strong interaction with formamidine ions (FA+) and Sn2+. The inter-component interaction allows the formation of controllable intermediates for the favorable growth of smooth, dense, and highly oriented perovskite films. A PSC with power conversion efficiency of 10.36% (7.16% for BAI) is achieved, which is the highest report, along with improved stability with ∼90% retained after ∼600 h storage in N2 atmosphere without any encapsulation. [Figure not available: see fulltext.]
AB - The crucial component, bulky spacers, in two-dimensional Ruddlesden-Popper (2DRP) layered tin (Sn) perovskites are highly limited by halide ammonium salts, leading to the insufficient control of complex crystallization process due to the limited interaction between bulky spacers and 2DRP perovskite frameworks. Here, we report an ionic liquid-bulky spacer, butylammounium acetate (BAAcO), for constructing efficient and stable 2DRP Sn-based perovskite solar cells (PSCs). In contrast to the traditional halide ammonium bulky spacer, butylammounium iodide (BAI), the AcO−-functional group in BAAcO has a strong interaction with formamidine ions (FA+) and Sn2+. The inter-component interaction allows the formation of controllable intermediates for the favorable growth of smooth, dense, and highly oriented perovskite films. A PSC with power conversion efficiency of 10.36% (7.16% for BAI) is achieved, which is the highest report, along with improved stability with ∼90% retained after ∼600 h storage in N2 atmosphere without any encapsulation. [Figure not available: see fulltext.]
KW - Ruddlesden-Popper phase
KW - Sn-based perovskite solar cells
KW - crystallization kinetic control
KW - ionic liquid-bulky spacer
KW - lead-free
UR - http://www.scopus.com/inward/record.url?scp=85111000570&partnerID=8YFLogxK
U2 - 10.1007/s11426-021-1075-7
DO - 10.1007/s11426-021-1075-7
M3 - 文章
AN - SCOPUS:85111000570
SN - 1674-7291
VL - 64
SP - 1577
EP - 1585
JO - Science China Chemistry
JF - Science China Chemistry
IS - 9
ER -