期刊
ACS NANO
卷 12, 期 3, 页码 2403-2414出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b07754
关键词
CeOx nanoink; surface modification; electron transport layer; perovskite solar cells; long-term stability
类别
资金
- National Natural Science Foundation of China [51672094, 51661135023]
- National Key R&D Program of China [2016YFC0205002]
- Self-determined and Innovative Research Funds of HUST [2016JCTD111]
- Wuhan Youth Science and Technology Plan [2017050304010297]
- open research funds of Engineering Research Center of Nano-Geo Materials of Ministry of Education, China University of Geosciences [NGM2017KF013]
- Guangdong Natural Science Foundation [2017A030313342]
- Basic Research Project of Shenzhen Science and Technology Plan [JCYJ201005280434A]
- Grants-in-Aid for Scientific Research [16H07471] Funding Source: KAKEN
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/MAPbI(3)/[6,6]-phenyl-C-61-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 N-2 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/MAPbI(3)/CeOx has also achieved a promising efficiency of 16.7%, reflecting the potential to fabricate efficient PVSCs with extremely low cost.
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