Abstract
The study deals with the sensitization of the porous SnO2 films deposited on fluorine-doped tin oxide with nanocrystalline Sb2Se3. The sensitization was achieved for three different sensitization times employing chemical solution deposition with antimony chloride and sodium selenosulphate as precursors for Sb3+ and Se2−, respectively. The unsensitized and sensitized photoelectrodes were characterized using X-ray diffractometry, scanning electron microscopy and diffused reflectance spectroscopy. The solar cells fabricated using three different photoelectrodes were characterized for their photovoltaic performance using the photocurrent density versus photovoltage curves. The study revealed that sensitization time significantly influences the photovoltaic parameters namely, short circuit current density (J sc), open circuit voltage (V oc) and fill factor (FF) and hence the photovoltaic efficiency (η).
Highlights
Metal chalcogenides such as CdS [1], CdSe [2], Ag2S [3], Sb2S3 [4], Bi2S3 [5] and Sb2Se3 [6] have recently attracted considerable attraction of researchers due to their potential applications in electrical and optical devices
Second one is based on electrodeposited Sb2Se3 thin films in TiO2/Sb2Se3/CuSCN planer heterojunction solar cells reported by Zaera et al [14]
We have demonstrated the photovoltaic performance of Sb2Se3 sensitized SnO2-based solar cells
Summary
Metal chalcogenides such as CdS [1], CdSe [2], Ag2S [3], Sb2S3 [4], Bi2S3 [5] and Sb2Se3 [6] have recently attracted considerable attraction of researchers due to their potential applications in electrical and optical devices Among these materials, antimony selenide (Sb2Se3) is a group V2–VI3 layered structured direct band gap semiconductor with orthorhombic crystal structure [7]. Theoretical calculations performed by Giustino et al [9, 10] demonstrated the improved performance of Sb2Se3-based devices compared to Sb2S3 based cells, and suggested Sb2Se3 as a promising candidate for achieving 20 % PCE In spite of these advantages, Sb2Se3-based solar cells have rarely been experimentally demonstrated.
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