TY - JOUR
T1 - (111)-Dominated Perovskite Films by Antisolvent Engineering
AU - Sun, Xiangyu
AU - Li, Dongni
AU - Zhao, Lu
AU - Zhang, Yao
AU - Hu, Qin
AU - Russell, Thomas P.
AU - Liu, Fangze
AU - Wei, Jing
AU - Li, Hongbo
N1 - Publisher Copyright:
© 2023 Wiley-VCH GmbH.
PY - 2023/7/13
Y1 - 2023/7/13
N2 - Fabricating perovskite films with a dominant crystal orientation is an effective path to realizing quasi-single-crystal perovskite film, which can eliminate the fluctuation of the electrical properties in films arising from grain-to-grain variations, and improve the performance of perovskite solar cells (PSCs). Perovskite (FAPbI3) films based on one-step antisolvent methods usually suffer from chaotic orientations due to the inevitable intermediate phase conversion from intermediates of PbI2•DMSO, FA2Pb3I8•4DMSO, and δ-FAPbI3 to α-FAPbI3. Here, a high-quality perovskite film with (111) preferred orientation ((111)-α-FAPbI3) using a short-chain isomeric alcohol antisolvent, isopropanol (IPA) or isobutanol (IBA), is reported. The interaction between IPA and PbI2 leads to a corner-sharing structure instead of an edge-sharing PbI2 octahedron, sidestepping the formation of these intermediates. With the volatilization of IPA, FA+ can replace IPA in situ to form α-FAPbI3 along the (111) direction. Compared to randomly orientated perovskites, the dominantly (111) orientated perovskite ((111)-perovskite) exhibits improved carrier mobility, uniform surface potential, suppressed film defects and enhanced photostability. PSCs based on the (111)-perovskite films show 22% power conversion efficiency and excellent stability, which remains unchanged after 600 h continuous working at maximum power point, and 95% after 2000 h of storage in atmosphere environment.
AB - Fabricating perovskite films with a dominant crystal orientation is an effective path to realizing quasi-single-crystal perovskite film, which can eliminate the fluctuation of the electrical properties in films arising from grain-to-grain variations, and improve the performance of perovskite solar cells (PSCs). Perovskite (FAPbI3) films based on one-step antisolvent methods usually suffer from chaotic orientations due to the inevitable intermediate phase conversion from intermediates of PbI2•DMSO, FA2Pb3I8•4DMSO, and δ-FAPbI3 to α-FAPbI3. Here, a high-quality perovskite film with (111) preferred orientation ((111)-α-FAPbI3) using a short-chain isomeric alcohol antisolvent, isopropanol (IPA) or isobutanol (IBA), is reported. The interaction between IPA and PbI2 leads to a corner-sharing structure instead of an edge-sharing PbI2 octahedron, sidestepping the formation of these intermediates. With the volatilization of IPA, FA+ can replace IPA in situ to form α-FAPbI3 along the (111) direction. Compared to randomly orientated perovskites, the dominantly (111) orientated perovskite ((111)-perovskite) exhibits improved carrier mobility, uniform surface potential, suppressed film defects and enhanced photostability. PSCs based on the (111)-perovskite films show 22% power conversion efficiency and excellent stability, which remains unchanged after 600 h continuous working at maximum power point, and 95% after 2000 h of storage in atmosphere environment.
KW - antisolvents
KW - defects
KW - high-orientation perovskites
KW - microstructural control
KW - working stability
UR - http://www.scopus.com/inward/record.url?scp=85159905171&partnerID=8YFLogxK
U2 - 10.1002/adma.202301115
DO - 10.1002/adma.202301115
M3 - Article
C2 - 37026169
AN - SCOPUS:85159905171
SN - 0935-9648
VL - 35
JO - Advanced Materials
JF - Advanced Materials
IS - 28
M1 - 2301115
ER -