title: Carbon Counter-Electrode-Based Quantum-Dot-Sensitized Solar Cells with Certified Efficiency Exceeding 11.
abstract: The mean power conversion efficiency (PCE) of quantum-dot-sensitized solar cells (QDSCs) is mainly limited by the low photovoltage and fill factor (FF), which are derived from the high redox potential of polysulfide electrolyte and the poor catalytic activity of the counter electrode (CE), respectively. Herein, we report that this problem is overcome by adopting Ti mesh supported mesoporous carbon (MC/Ti) CE. The confined area in Ti mesh substrate not only offers robust carbon film with submillimeter thickness to ensure high catalytic capacity, but also provides an efficient three-dimension electrical tunnel with better conductivity than state-of-art Cu2S/FTO CE. More importantly, the MC/Ti CE can down shift the redox potential of polysulfide electrolyte to promote high photovoltage. In all, MC/Ti CEs boost PCE of CdSe0.65Te0.35 QDSCs to a certified record of 11.16% (Jsc = 20.68 mA/cm(2), Voc = 0.798 V, FF = 0.677), an improvement of 24% related to previous record. This work thus paves a way for further improvement of performance of QDSCs.
authors.affiliation: Key Laboratory for Advanced Materials, Institute of Applied Chemistry, East China University of Science and Technology , 200237 Shanghai, China.
authors.forename: Zhonglin
authors.initials: Z
authors.lastname: Du
authors.affiliation: Key Laboratory for Advanced Materials, Institute of Applied Chemistry, East China University of Science and Technology , 200237 Shanghai, China.
authors.forename: Zhenxiao
authors.initials: Z
authors.lastname: Pan
authors.affiliation: Institute of Advanced Materials (INAM), Universitat Jaume I , 12006 Castelló, Spain.
authors.forename: Francisco
authors.initials: F
authors.lastname: Fabregat-Santiago
authors.affiliation: Key Laboratory for Advanced Materials, Institute of Applied Chemistry, East China University of Science and Technology , 200237 Shanghai, China.
authors.forename: Ke
authors.initials: K
authors.lastname: Zhao
authors.affiliation: School of Chemical Engineering, East China University of Science and Technology , 200237 Shanghai, China.
authors.forename: Donghui
authors.initials: D
authors.lastname: Long
authors.affiliation: Key Laboratory for Advanced Materials, Institute of Applied Chemistry, East China University of Science and Technology , 200237 Shanghai, China.
authors.forename: Hua
authors.initials: H
authors.lastname: Zhang
authors.affiliation: School of Environmental Engineering, Shanghai Jiaotong University , 200240 Shanghai, China.
authors.forename: Yixin
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Key Laboratory for Advanced Materials, Institute of Applied Chemistry, East China University of Science and Technology , 200237 Shanghai, China.
authors.forename: Xinhua
authors.initials: X
authors.lastname: Zhong
authors.affiliation: Department of Energy Systems Engineering, DGIST , 42988 Daegu, Republic of Korea.
authors.forename: Jong-Sung
authors.initials: JS
authors.lastname: Yu
authors.affiliation: Institute of Advanced Materials (INAM), Universitat Jaume I , 12006 Castelló, Spain.|Department of Chemistry, King Abdulaziz University , Jeddah, Saudi Arabia.
authors.forename: Juan
authors.initials: J
authors.lastname: Bisquert