A non-platinum counter electrode, MnNx/C, for dye-sensitized solar cell applications

作者:Kushwaha Suman; Karthikayini M P; Wang Guanxiong; Mandal Sudip; Bhobe Preeti A; Ramani Vijay K; Priolkar K R; Ramanujam Kothandaraman*
来源:Applied Surface Science, 2017, 418: 179-185.
DOI:10.1016/j.apsusc.2016.12.140

摘要

non-platinum metal catalyst, MnNx/C was synthesized via the high-pressure pyrolysis route. The combination of X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) studies indicated the presence of Mn in +2 oxidation state surrounded by four N atoms. The peak-to-peak separation (Delta E-p) of the more negative peak pair observed for I-3(-)/I- redox couple over MnNx/C catalyst was 20 mV lower than that of the Pt catalyst, indicating high reversibility of the redox couple over MnNx/C catalyst. The charge transfer resistance of the MnNx/C electrode, as measured by the impedance spectroscopy, is similar to 2 Omega higher than that of Pt, which resulted slightly lower short circuit current (Jsc) value for MnNx/C over Pt, however the fill factor (FF) and power conversion efficiency (PCE) values of MnNx/C was slightly higher and comparable to that of Pt respectively. Hence; replacing Pt with MnNx/C would decrease the cost of DSSCs.

  • 出版日期2017-10-1