期刊
ADVANCED FUNCTIONAL MATERIALS
卷 24, 期 23, 页码 3587-3592出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201304238
关键词
Sb2S3 sensitized; solar cells; high efficiency; thioacetamide; deep-level transient spectroscopy
类别
资金
- Global Research Laboratory (GRL) Program
- Global Frontier R&D Program on Center for Multiscale Energy System - National Research Foundation under the Ministry of Science, ICT Future, Korea
- KRICT Program for Future Technology of the Korea Research Institute of Chemical Technology (KRICT), Republic of Korea
- National Research Foundation of Korea [2007-00091, 2011-0031565] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The light-harvesting Sb2S3 surface on mesoporous-TiO2 in inorganic-organic heterojunction solar cells is sulfurized with thioacetamide (TA). The photovoltaic performances are compared before and after TA treatment, and the state of the Sb2S3 is investigated by X-ray diffraction, X-ray photoelectron spectroscopy, and deep-level transient spectroscopy (DLTS). Although there are no differences in crystallinity and composition, the TA-treated solar cells exhibit significantly enhanced performance compared to pristine Sb2S3-sensitized solar cells. From DLTS analysis, the performance enhancement is mainly attributed to the extinction of trap sites, which are present at a density of (2-5) x 10(14) cm(-3) in Sb2S3, by TA treatment. Through such a simple treatment, the cell records an overall power conversion efficiency (PCE) of 7.5% through a metal mask under simulated illumination (AM 1.5G, 100 mW cm(-2)) with a very high open circuit voltage of 711.0 mV. This PCE is, thus far, the highest reported for fully solid-state chalcogenide-sensitized solar cells.
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