TY - JOUR
T1 - 2D Polymers with Lead Anchoring Groups Enable Perovskite Solar Cells with Over 24% Efficiency
AU - Lai, Hongtao
AU - Tang, Xingchen
AU - Bi, Leyu
AU - Tian, Binqiang
AU - Wang, Huanhuan
AU - Ji, Xiaofei
AU - Fu, Qiang
PY - 2024/2
Y1 - 2024/2
N2 - The hygroscopic dopants used in Spiro-OMeTAD hole-transport materials (HTMs) in n–i–p perovskite solar cells (PSCs) inevitably cause device degradation. Herein, two polymer interface materials based on lead anchoring groups are developed. It is found that 2D polymers 2DP-BT and 2DP-Por can form dense films and exhibit excellent hydrophobicity. Importantly, 2DP-Por can passivate the surface defects through noncovalent interactions, reducing nonradiative recombination loss. After introducing these polymer interface materials between the perovskite layer and the HTM layer, the optimized devices using 2DP-Por and 2DP-BT achieve champion power conversion efficiency of 24.12% and 23.29%, respectively, and the stability is significantly improved. These results indicate that developing polymer interface materials containing lead anchoring groups can improve PSC efficiency and stability and elucidate critical molecular design rules for interface materials. © 2023 Wiley-VCH GmbH.
AB - The hygroscopic dopants used in Spiro-OMeTAD hole-transport materials (HTMs) in n–i–p perovskite solar cells (PSCs) inevitably cause device degradation. Herein, two polymer interface materials based on lead anchoring groups are developed. It is found that 2D polymers 2DP-BT and 2DP-Por can form dense films and exhibit excellent hydrophobicity. Importantly, 2DP-Por can passivate the surface defects through noncovalent interactions, reducing nonradiative recombination loss. After introducing these polymer interface materials between the perovskite layer and the HTM layer, the optimized devices using 2DP-Por and 2DP-BT achieve champion power conversion efficiency of 24.12% and 23.29%, respectively, and the stability is significantly improved. These results indicate that developing polymer interface materials containing lead anchoring groups can improve PSC efficiency and stability and elucidate critical molecular design rules for interface materials. © 2023 Wiley-VCH GmbH.
KW - 2D polymers
KW - defect passivation
KW - lead anchoring
KW - perovskite solar cells
UR - http://www.scopus.com/inward/record.url?scp=85181223311&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85181223311&origin=recordpage
U2 - 10.1002/solr.202300961
DO - 10.1002/solr.202300961
M3 - RGC 21 - Publication in refereed journal
SN - 2367-198X
VL - 8
JO - Solar RRL
JF - Solar RRL
IS - 4
M1 - 2300961
ER -
