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XUAN JI1, MAOLIN ZHANG1,* , PENG ZHONG1, DONGYAN ZHANG1, PENG SUN1, YUAN WANG1, ZHIMIN LI1
Counter electrode (CE) is used to catalyze the reduction of oxidized species in an electrolyte for quantum dot sensitized solar cells (QDSSCs). Carbon based materials were considered as excellent candidates for CEs. In this work, N and S co doped reduced graphene oxide (RGO) was prepared by simple one step hydrothermal synthesis to increase the number of active catalytic site. XPS was used to analyze surface chemistry state of doped RGO in depth. TiO 2 /CdS/CdSe based QDSSCs using as prepared CE sho wed enhanced photovoltaic performance with power conversion efficiency of 2.3%, far superior to that of a cell with undoped RGO. EIS and Tafel polarization measurements were used to investigate electrocatalytic activity of as prepared CEs. Improved photovo ltaic performance can be attributed to N and S co doping, making surrounding carbon atoms active. This is beneficial in providing more active sites for S n 2 --/S 2 redox couple..
QDSSCs Counter electrode N and S co doped RGO Electrocatalytic activity.
XUAN JI, MAOLIN ZHANG, PENG ZHONG, DONGYAN ZHANG, PENG SUN, YUAN WANG, ZHIMIN LI, N and S co doped RGO as effective counter electrode for quantum dot sensitized solar cells, Optoelectronics and Advanced Materials - Rapid Communications, 13, 5-6, May-June 2019, pp.348-353 (2019).
Submitted at: Sept. 11, 2018
Accepted at: June 14, 2019
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
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