TY - JOUR
T1 - [6,6]-phenyl-C61-butyric acid methyl ester/cerium oxide bilayer structure as efficient and stable electron transport layer for inverted perovskite solar cells
AU - Fang, Rui
AU - Wu, Shaohang
AU - Chen, Weitao
AU - Liu, Zonghao
AU - Zhang, Shasha
AU - Chen, Rui
AU - Yue, Youfeng
AU - Deng, Linlong
AU - Cheng, Yi Bing
AU - Han, Liyuan
AU - Chen, Wei
PY - 2018/3/27
Y1 - 2018/3/27
N2 - Stability issues and high material cost constitute the biggest obstacles of a perovskite solar cell (PVSC), hampering its sustainable development. Herein, we demonstrate that, after suitable surface modification, the low-cost cerium oxide (CeOx) nanocrystals can be well dispersed in both polar and nonpolar solvents and easily processed into high-quality electron transport layers (ETLs). The inverted PVSC with the configuration of "NiMgLiO/MAPbI3/[6,6]-phenyl-C61-butyric acid methyl ester (PCBM)/CeOx" has achieved a high efficiency up to 18.7%. Especially, the corresponding devices without encapsulation can almost keep their initial PCEs in 30% humidity-controlled air in the dark for 30 days and also show no sign of degradation after continuous light soaking and maximum power point tracking for 200 h in a N2 atmosphere. These results have been proved to be associated with the dual functions achieved by the PCBM/CeOx bilayer ETLs in both efficient electron extraction and good chemical shielding. Furthermore, an all inorganic interfacial layer based PVSC with the configuration of "NiMgLiO/MAPbI3/CeOx" has also achieved a promising efficiency of 16.7%, reflecting the potential to fabricate efficient PVSCs with extremely low cost.
AB - Stability issues and high material cost constitute the biggest obstacles of a perovskite solar cell (PVSC), hampering its sustainable development. Herein, we demonstrate that, after suitable surface modification, the low-cost cerium oxide (CeOx) nanocrystals can be well dispersed in both polar and nonpolar solvents and easily processed into high-quality electron transport layers (ETLs). The inverted PVSC with the configuration of "NiMgLiO/MAPbI3/[6,6]-phenyl-C61-butyric acid methyl ester (PCBM)/CeOx" has achieved a high efficiency up to 18.7%. Especially, the corresponding devices without encapsulation can almost keep their initial PCEs in 30% humidity-controlled air in the dark for 30 days and also show no sign of degradation after continuous light soaking and maximum power point tracking for 200 h in a N2 atmosphere. These results have been proved to be associated with the dual functions achieved by the PCBM/CeOx bilayer ETLs in both efficient electron extraction and good chemical shielding. Furthermore, an all inorganic interfacial layer based PVSC with the configuration of "NiMgLiO/MAPbI3/CeOx" has also achieved a promising efficiency of 16.7%, reflecting the potential to fabricate efficient PVSCs with extremely low cost.
KW - CeOnanoink
KW - Electron transport layer
KW - Long-term stability
KW - Perovskite solar cells
KW - Surface modification
UR - http://www.scopus.com/inward/record.url?scp=85044538904&partnerID=8YFLogxK
U2 - 10.1021/acsnano.7b07754
DO - 10.1021/acsnano.7b07754
M3 - Article
C2 - 29481056
AN - SCOPUS:85044538904
VL - 12
SP - 2403
EP - 2414
JO - ACS Nano
JF - ACS Nano
SN - 1936-0851
IS - 3
ER -