期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 28, 页码 18284-18291出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b04895
关键词
perovskite solar cells; electron transport layer; fullerenol; fullerene derivatives; charge extraction efficiency; interfacial resistance
资金
- National Natural Science Foundation of China [51303118, 51302178, 91333204]
- Natural Science Foundation of Jiangsu Province [BK20130289, BK20130295]
- Ph.D. Programs Foundation of Ministry of Education of China [20133201120008]
- Scientific Research Foundation for Returned Scholars, Ministry of Education of China
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Beijing National Laboratory for Molecular Sciences [20140112]
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
TiO2 is widely used in perovskite solar cells (Pero-SCs), but its low electrical conductivity remains a drawback for application in electron transport layer (ETL). To overcome this problem, an easily accessible hydroxylated fullerene, fullerenol, was employed herein as ETL modified on ITO in n-i-p type (ITO as cathode) Pero-SCs for the first time. The results showed that the insertion of a single layer of fullerenol between perovskite and TiO2 dramatically facilitates the charge transportation and decreases the interfacial resistance. As a consequence, the device performance was greatly improved, and a higher power conversion efficiency of 14.69% was achieved, which is similar to 17.5% enhancement compared with that (12.50%) of the control device without the fullerenol interlayer. This work provides a new candidate of interfacial engineering for facilitating the electron transportation in Pero-SCs.
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