Highly effective nickel sulfide counter electrode catalyst prepared by optimal hydrothermal treatment for quantum dot-sensitized solar cells
作者： Chandu V.V.M. Gopi , S. Srinivasa Rao , Soo-Kyoung Kim , Dinah Punnoose , Hee-Je Kim
DOI: 10.1016/J.JPOWSOUR.2014.11.038
关键词:
摘要: Abstract Nickel sulfide (NiS) thin film has been deposited on a fluorine-doped tin oxide substrate by hydrothermal method using 3-mercaptopropionic acid and used as an efficient counter electrode (CE) for polysulfide redox reactions in quantum dot-sensitized solar cells (QDSSCs). NiS low toxicity environmental compatibility. In the present study, size of nanoparticle increases with deposition time. The performance QDSSCs is examined detail electrolyte CE. A TiO2/CdS/CdSe/ZnS-based QDSSC CE shows enhanced photovoltaic power conversion efficiency (PCE) 3.03%, which superior to that cell Pt (PCE 2.20%) under one sun illumination (AM 1.5, 100 mW cm−2). improved NiS-based may be attributed charge transfer resistance (5.08 Ω) reduction CE, indicating greater electrocatalytic activity NiS. Electrochemical impedance spectroscopy, cyclic voltammetry, Tafel-polarization measurements were investigate CEs.
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