Nano Express

Nanoscale Research Letters

, Volume 5, Issue 6, pp 986-990

Open Access This content is freely available online to anyone, anywhere at any time.

Low-Cost Flexible Nano-Sulfide/Carbon Composite Counter Electrode for Quantum-Dot-Sensitized Solar Cell

  • Minghui DengAffiliated withBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
  • , Quanxin ZhangAffiliated withBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
  • , Shuqing HuangAffiliated withBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
  • , Dongmei LiAffiliated withBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
  • , Yanhong LuoAffiliated withBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
  • , Qing ShenAffiliated withDepartment of Applied Physics and Chemistry, The University of Electro-CommunicationsPRESTO, Japan Science and Technology Agency
  • , Taro ToyodaAffiliated withDepartment of Applied Physics and Chemistry, The University of Electro-Communications
  • , Qingbo MengAffiliated withBeijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences Email author 

Abstract

Cu2S nanocrystal particles were in situ deposited on graphite paper to prepare nano-sulfide/carbon composite counter electrode for CdS/CdSe quantum-dot-sensitized solar cell (QDSC). By optimization of deposition time, photovoltaic conversion efficiency up to 3.08% was obtained. In the meantime, this composite counter electrode was superior to the commonly used Pt, Au and carbon counter electrodes. Electrochemical impedance spectra further confirmed that low charge transfer resistance at counter electrode/electrolyte interface was responsible for this, implied the potential application of this composite counter electrode in high-efficiency QDSC.

Keywords

Quantum dot Sensitized solar cell Composite Flexible Carbon electrode Cu2S CdS/CdSe