期刊
ADVANCED MATERIALS INTERFACES
卷 9, 期 11, 页码 -出版社
WILEY
DOI: 10.1002/admi.202101595
关键词
carbon nanotubes; MoO3 doping; silicon solar cells; tandem solar cells; transparent perovskite solar cells
资金
- National Research Foundation of Korea - Ministry of Science and ICT (MSIT), Korea [NRF-2021R1C1C1009200, NRF-2020R1G1A1101578]
- JSPS KAKENHI [JP18H05329, JP20H00220]
- JST CREST, Japan [JPMJCR20B5]
- JSPS Fellowship [18J22263]
- Academy of Finland [316572]
- 2020 BK21 FOUR Program of Pusan National University
- Academy of Finland (AKA) [316572, 316572] Funding Source: Academy of Finland (AKA)
- Grants-in-Aid for Scientific Research [18J22263] Funding Source: KAKEN
MoO3 doping of carbon-nanotube top electrodes in perovskite solar cells improves hole transport and energy-level alignment. It also decreases the sheet resistance without damaging the perovskite film. Additionally, MoO3 deposition enhances hole collection when coated with spiro-MeOTAD.
MoO3 doping of carbon-nanotube top electrodes in perovskite solar cells is multi-functional and facilitates p-doping, favorable energy-level alignment, and enhanced hole transport. The optimal layer thickness of MoO3 (8 nm) is determined for decreasing the sheet resistance of carbon-nanotube electrodes without damaging the perovskite film. The sheet resistance decreases by approximately one-third from its original value, which is a substantially better result than that previously reported for acid doping of carbon-nanotube top electrodes. MoO3 deposition lowers the Fermi level of the carbon-nanotube electrode, improving its energy-level alignment and hole-transfer performance. When coated with 2,2',7,7'-tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene (spiro-MeOTAD), MoO3 crystallizes on the carbon nanotubes and further enhances hole collection. Semi-transparent perovskite solar cells with MoO3-doped carbon-nanotube electrodes have a power conversion efficiency of 17.3% with a transmittance of approximately 60% (at a wavelength of 1000 nm). Because of their favorable transparency in the infrared region, these perovskite solar cells are evaluated for use in a tandem structure with silicon solar cells via computational simulations. The predicted device efficiency (23.7%) exceeds that of conventional indium-tin-oxide-based tandem solar cells (23.0%).
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