10.1021/acsami.7b18526.s001 Chandu V. V. Muralee Gopi Chandu V. V. Muralee Gopi Saurabh Singh Saurabh Singh Araveeti Eswar Reddy Araveeti Eswar Reddy Hee-Je Kim Hee-Je Kim CNT@rGO@MoCuSe Composite as an Efficient Counter Electrode for Quantum Dot-Sensitized Solar Cells American Chemical Society 2018 surface area counter electrode paper reports electron transport rate Quantum Dot-Sensitized Solar Cells MoCuSe CE hydrothermal approach Ni foam substrate molybdenum copper selenide power conversion efficiency carbon nanotube graphene oxide MoCuSe particles Efficient Counter Electrode quantum dot-sensitized energy-related fields QDSSC CNT 100 h 2018-03-13 11:37:26 Journal contribution https://acs.figshare.com/articles/journal_contribution/CNT_rGO_MoCuSe_Composite_as_an_Efficient_Counter_Electrode_for_Quantum_Dot-Sensitized_Solar_Cells/5977132 This paper reports an efficient and simple strategy for the synthesis of molybdenum copper selenide (MoCuSe) nanoparticles decorated with a combination of a carbon nanotube (CNT) network and reduced graphene oxide (rGO) nanosheets to form an integrated hybrid architecture (CNT@rGO@MoCuSe) using a two-step hydrothermal approach. The synthesized hybrid CNT@rGO@MoCuSe material onto the Ni foam substrate is applied successfully as an effective counter electrode (CE) in quantum dot-sensitized solar cells (QDSSCs). A highly conductive CNT@rGO network grown on electrochemically active MoCuSe particles provides a large surface area and exhibits a rapid electron transport rate at the interface of CE/electrolyte. As a result, the QDSSC with the designed CNT@rGO@MoCuSe CE shows a higher power conversion efficiency of 8.28% under 1 sun (100 mW cm<sup>–2</sup>) irradiation, which is almost double the efficiency of 4.04% for the QDSSC with the MoCuSe CE. Furthermore, the QDSSC based on the CNT@rGO@MoCuSe CE delivers superior stability at a working state for over 100 h. Therefore, CNT@rGO@MoCuSe is very promising as a stable and efficient CE for QDSSCs and offers new opportunities for the development of hybrid, effective, and robust materials for energy-related fields.