Kalanur, Shankara Sharanappa Chae, Sang Youn Joo, Oh Shim 2024-01-20T12:01:37Z 2024-01-20T12:01:37Z 2021-09-05 2013-07-30 0013-4686 https://pubs.kist.re.kr/handle/201004/127853 The use of metal sulfides as counter electrode (CE) improves the short circuit current, open circuit voltage, fill factor, and power conversion efficiency (eta) of quantum dot solar cells (QDSCs) compared to the conventional Pt electrode. Here we demonstrate a simple hydrothermal method for the preparation of copper sulfide thin film on FTO, containing Cu1.8S and CuS (Cu1.8S/CuS) which can serve as efficient CE for QDSCs. Hydrothermal deposition of Cu1.8S/CuS is carried out using thiourea as a source of sulfur and different copper salts as a source for copper. The product stoichiometry between Cu and S is observed to be dependent on the copper precursor. Under the illumination of one sun (100 mW cm(-2)), the CdS-TiO2 QDSCs incorporated with Cu1.8S/CuS CE exhibits eta values of 1.66%, which is much higher than the value 0.61% obtained with Pt CE. Electrochemical impedance spectroscopy reveals low charge transfer resistance between polysulfide electrolyte and Cu1.8S/CuS CE, indicating the high catalytic activity of Cu1.8S/CuS CE. The results of this work show the potential application of hydrothermal synthetic method in making Cu1.8S/CuS CE instead of Pt, for large-scale transparent QDSCs in the future. (C) 2013 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD HIGHLY EFFICIENT PBS SENSITIZATION CONVERSION Transparent Cu1.8S and CuS thin films on FTO as efficient counter electrode for quantum dot solar cells Article 10.1016/j.electacta.2013.04.041 1 ELECTROCHIMICA ACTA, v.103, pp.91 - 95 ELECTROCHIMICA ACTA 103 91 95 scie scopus 000321601100013 2-s2.0-84877656612 Electrochemistry Electrochemistry Article HIGHLY EFFICIENT PBS SENSITIZATION CONVERSION Quantum dot solar cell Counter electrode Copper sulfide Hydrothermal method Polysulfide redox couple Charge-transfer resistance