Interconnected molybdenum disulfide@tin disulfide heterojunctions with different morphologies: a type of enhanced counter electrode for dye-sensitized solar cells

CrystEngComm ◽  
2018 ◽  
Vol 20 (9) ◽  
pp. 1252-1263 ◽  
Author(s):  
Kang Zhang ◽  
Jixin Yao ◽  
Xueqin Zuo ◽  
Qun Yang ◽  
Huaibao Tang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solar Cells ◽  
Molybdenum Disulfide ◽  
Counter Electrode ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Tin Disulfide ◽  
Sensitized Solar Cells

The MoS2@SnS2 heterojunctions have been synthesized and displayed the enhanced performance due to the specific crystal structure.

Investigation of Hexagonal Boron Nitride for Application as Counter Electrode in Dye-Sensitized Solar Cells

2012 ◽  
Vol 512-515 ◽  
pp. 242-245 ◽  
Author(s):  
Shun Jian Xu ◽  
Yu Feng Luo ◽  
Wei Zhong ◽  
Zong Hu Xiao ◽  
Xiao Yun Liu
Keyword(s):  
Crystal Structure ◽  
Solar Cells ◽  
Boron Nitride ◽  
Counter Electrode ◽  
Hexagonal Boron Nitride ◽  
Dye Sensitized Solar Cells ◽  
Transfer Resistance ◽  
Dye Sensitized ◽  
Catalytic Material ◽  
Sensitized Solar Cells

Hexagonal boron nitride (HBN), which has the same crystal structure as graphite, has been used as catalytic material for a counter electrode in dye-sensitized solar cells (DSCs) to investigate its potential application. X-ray diffraction (XRD) has been used to confirm the crystal structure of HBN, scanning electron microscopy (SEM) has been used to characterize the morphology of HBN film on counter electrode, and electrochemical workstation has been employed to obtain the electrochemical impedance spectroscopy (EIS) and corresponding impedance parameters. Results show that the HBN film has rough surface and porous structure with pore size of less than 1 μm. When employed the HBN counter electrode to DSCs, the conversion efficiency (η) is only about a tenth of that of graphite based DSCs. Low efficiency of HBN based DSCs is induced by high charge transfer resistance (Rct) of HBN counter electrode, which means that HBN can hardly provide catalytic activity for the reduction of the triiodide ion. Therefore, the crystal structure is not a crucial factor to select the catalytic material for a counter electrode in DSCs. Moreover, the short circuit photocurrent density (Jsc) and the open circuit voltage (Voc) of device also evidently depend on the characteristics of catalytic material.

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