Electronic structure evolution of fullerene on CH3NH3PbI3
Abstract
The thickness dependence of fullerene on CH3NH3PbI3 perovskitefilm surface has been investigated by using ultraviolet photoemission spectroscopy (UPS), X-ray photoemission spectroscopy(XPS), and inverse photoemission spectroscopy (IPES). The lowest unoccupied molecular orbital and highest occupied molecular orbital (HOMO) can be observed directly with IPES and UPS. It is observed that the HOMO level in fullerene shifts to lower binding energy. The XPS results show a strong initial shift of core levels to lower binding energy in the perovskite, which indicates that electrons transfer from the perovskitefilm to fullerene molecules. Further deposition of fullerene forms C60 solid, accompanied by the reduction of the electron transfer. As a result, the strongest electron transfer happened at 1/4 monolayer of fullerene.
- Authors:
-
- Univ. of Rochester, Rochester, NY (United States)
- Central South Univ., Changsha (People's Republic of China)
- Univ. of Nebraska, Lincoln, NE (United States)
- Publication Date:
- Research Org.:
- Univ. of Nebraska, Lincoln, NE (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1238030
- Alternate Identifier(s):
- OSTI ID: 1226724
- Grant/Contract Number:
- EE0006709
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 106; Journal Issue: 11; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; dielectric oxides; fullerenes; solar cells; electron transfer; thin films
Citation Formats
Wang, Chenggong, Wang, Congcong, Liu, Xiaoliang, Kauppi, John, Shao, Yuchuan, Xiao, Zhengguo, Bi, Cheng, Huang, Jinsong, and Gao, Yongli. Electronic structure evolution of fullerene on CH3NH3PbI3. United States: N. p., 2015.
Web. doi:10.1063/1.4916079.
Wang, Chenggong, Wang, Congcong, Liu, Xiaoliang, Kauppi, John, Shao, Yuchuan, Xiao, Zhengguo, Bi, Cheng, Huang, Jinsong, & Gao, Yongli. Electronic structure evolution of fullerene on CH3NH3PbI3. United States. https://doi.org/10.1063/1.4916079
Wang, Chenggong, Wang, Congcong, Liu, Xiaoliang, Kauppi, John, Shao, Yuchuan, Xiao, Zhengguo, Bi, Cheng, Huang, Jinsong, and Gao, Yongli. Thu .
"Electronic structure evolution of fullerene on CH3NH3PbI3". United States. https://doi.org/10.1063/1.4916079. https://www.osti.gov/servlets/purl/1238030.
@article{osti_1238030,
title = {Electronic structure evolution of fullerene on CH3NH3PbI3},
author = {Wang, Chenggong and Wang, Congcong and Liu, Xiaoliang and Kauppi, John and Shao, Yuchuan and Xiao, Zhengguo and Bi, Cheng and Huang, Jinsong and Gao, Yongli},
abstractNote = {The thickness dependence of fullerene on CH3NH3PbI3 perovskitefilm surface has been investigated by using ultraviolet photoemission spectroscopy (UPS), X-ray photoemission spectroscopy(XPS), and inverse photoemission spectroscopy (IPES). The lowest unoccupied molecular orbital and highest occupied molecular orbital (HOMO) can be observed directly with IPES and UPS. It is observed that the HOMO level in fullerene shifts to lower binding energy. The XPS results show a strong initial shift of core levels to lower binding energy in the perovskite, which indicates that electrons transfer from the perovskitefilm to fullerene molecules. Further deposition of fullerene forms C60 solid, accompanied by the reduction of the electron transfer. As a result, the strongest electron transfer happened at 1/4 monolayer of fullerene.},
doi = {10.1063/1.4916079},
journal = {Applied Physics Letters},
number = 11,
volume = 106,
place = {United States},
year = {Thu Mar 19 00:00:00 EDT 2015},
month = {Thu Mar 19 00:00:00 EDT 2015}
}
Web of Science
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