Cited 40 time in webofscience Cited 38 time in scopus

Carbon Counter-Electrode-Based Quantum-Dot-Sensitized Solar Cells with Certified Efficiency Exceeding 11%

Title
Carbon Counter-Electrode-Based Quantum-Dot-Sensitized Solar Cells with Certified Efficiency Exceeding 11%
Authors
Du, ZL[Du, Zhonglin]Pan, ZX[Pan, Zhenxiao]Fabregat-Santiago, F[Fabregat-Santiago, Francisco]Zhao, K[Zhao, Ke]Long, DH[Long, Donghui]Zhang, H[Zhang, Hua]Zhao, YX[Zhao, Yixin]Zhong, XH[Zhong, Xinhua]Yu, JS[Yu, Jong-Sung]Bisquert, J[Bisquert, Juan]
DGIST Authors
Yu, JS[Yu, Jong-Sung]
Issue Date
2016-08-18
Citation
Journal of Physical Chemistry Letters, 7(16), 3103-3111
Type
Article
Article Type
Article
Keywords
Carbon Counter ElectrodesCarbon FilmsCatalyst ActivityConfined AreasCopperCounter ElectrodesEfficiencyElectrodesElectrolytesMesh GenerationMesoporous CarbonNanocrystalsPolyelectrolytesPolysulfidesQuantum Dot-Sensitized Solar CellsRedox PotentialsRedox ReactionsSemiconductor Quantum DotsSolar CellsSubmillimetersThree Dimensions
ISSN
1948-7185
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/cm2, 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. © 2016 American Chemical Society.
URI
http://hdl.handle.net/20.500.11750/2210
DOI
10.1021/acs.jpclett.6b01356
Publisher
American Chemical Society
Related Researcher
  • Author Yu, Jong Sung Light, Salts and Water Research Group
  • Research Interests Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
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Collection:
ETC1. Journal Articles


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