期刊
APPLIED SURFACE SCIENCE
卷 476, 期 -, 页码 897-904出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2019.01.130
关键词
Solar cells; Mesoporous TiO2; Sb2S3; Interface engineering; Ni-4 mercaptophenol; Atomic layer deposition
类别
资金
- Creative Materials Discovery Program [2015M3D1A1068061, 2017R1A2A1A17069769]
- Ministry of Science, ICT, and Future Planning of South Korea
In this work, we introduced a novel Ni-4 mercaptophenol (Ni4MP) as an interfacial layer in Sb2S3 -sensitized mesoporous TiO2 solar cells. Ni4MP thin films with controllable thickness were prepared by an integrated approach via atomic/molecular layer deposition techniques and were systematically characterized. Introduction of the Ni4MP interlayer significantly enhanced the photovoltaic performance and the interfacial charge transfer kinetics of Sb2S3-sensitized solar cells. The augmentation of open circuit voltage and short circuit density due to the insertion of a Ni4MP interlayer enhanced the power conversion efficiency of the solar cells from 2.07% to 2.79%, corresponding to a 35% increase in efficiency. This improvement in device performance was discussed based on the energy band diagram. We found that the Ni4MP interlayer can effectively extract the photo-generated holes from the Sb2S3 sensitizer due to the excellent band matching and hole scavenging characteristics, thus enhancing the charge transport and suppressing the recombination.
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