Highly Improved Sb2S3 Sensitized-Inorganic-Organic Heterojunction Solar Cells and Quantification of Traps by Deep-Level Transient Spectroscopy
- Authors
- Choi, Yong Chan; Lee, Dong Uk; Noh, Jun Hong; Kim, Eun Kyu; Seok, Sang Il
- Issue Date
- Jun-2014
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- Sb2S3 sensitized; solar cells; high efficiency; thioacetamide; deep-level transient spectroscopy
- Citation
- ADVANCED FUNCTIONAL MATERIALS, v.24, no.23, pp.3587 - 3592
- Indexed
- SCIE
SCOPUS
- Journal Title
- ADVANCED FUNCTIONAL MATERIALS
- Volume
- 24
- Number
- 23
- Start Page
- 3587
- End Page
- 3592
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/143366
- DOI
- 10.1002/adfm.201304238
- ISSN
- 1616-301X
- Abstract
- 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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