scholarly journals Dye-Sensitized Solar Cells with Electrospun Nanofiber Mat-Based Counter Electrodes

Materials ◽  
2018 ◽  
Vol 11 (9) ◽  
pp. 1604 ◽  
Author(s):  
Irén Juhász Junger ◽  
Daria Wehlage ◽  
Robin Böttjer ◽  
Timo Grothe ◽  
László Juhász ◽  
...  
Keyword(s):  
Solar Cells ◽  
Dye Sensitized Solar Cells ◽  
Conductive Polymer ◽  
Energy Conversion Efficiency ◽  
Electrospun Nanofiber ◽  
Counter Electrodes ◽  
Dye Sensitized ◽  
Nanofiber Mats ◽  
Sensitized Solar Cells ◽  
Textile Fabric

Textile-based dye-sensitized solar cells (DSSCs) can be created by building the necessary layers on a textile fabric or around fibers which are afterwards used to prepare a textile layer, typically by weaving. Another approach is using electrospun nanofiber mats as one or more layers. In this work, electrospun polyacrylonitrile (PAN) nanofiber mats coated by a conductive polymer poly(3,4-ethylenedioxythiopene) polystyrene sulfonate (PEDOT:PSS) were used to produce the counter electrodes for half-textile DSSCs. The obtained efficiencies were comparable with the efficiencies of pure glass-based DSSCs and significantly higher than the efficiencies of DSSCs with cotton based counter electrodes. The efficiency could be further increased by increasing the number of PEDOT:PSS layers on the counter electrode. Additionally, the effect of the post treatment of the conductive layers by HCl, acetic acid, or dimethyl sulfoxide (DMSO) on the DSSC efficiencies was investigated. Only the treatment by HCl resulted in a slight improvement of the energy-conversion efficiency.

Study on the Change in Photovoltage by Control of Cell Gap in Dye-Sensitized Solar Cells

2010 ◽  
Vol 132 (2) ◽  
Author(s):  
Chaehyeon Lee ◽  
Weekyung Kang ◽  
Min Jae Ko ◽  
Kyoungkon Kim ◽  
Nam-Gyu Park
Keyword(s):  
Solar Cells ◽  
Electrochemical Impedance ◽  
Dye Sensitized Solar Cells ◽  
Energy Conversion Efficiency ◽  
Open Circuit ◽  
Electrolyte System ◽  
Counter Electrodes ◽  
Dye Sensitized ◽  
Transient Photovoltage ◽  
Sensitized Solar Cells

Photo-electrochemical properties of dye-sensitized solar cells (DSSCs) were investigated by changing the gap between working and counter electrodes. The open-circuit voltage (VOC) of DSSCs was significantly increased from 616 mV to 776 mV by about 26% with 1-methyl-3-butyl imidazolium iodide (BMII) based electrolyte and from 428 mV to 513 mV by 20% with lithium iodide (LiI) based electrolyte as the cell gap increased from 16 μm to 224 μm. From the electrochemical impedance spectroscopy, it was found that the resistance of the electrolyte was increased as the cell gap widened. This resulted in the reduction in the dark current associated with the VOC enhancement. The transient photovoltage spectroscopic measurement confirmed that the time constant for charge recombination between TiO2 and electrolyte became slower as the cell gap of the DSSC with LiI electrolyte increased, which could be an additional reason for the VOC enhancement. The optimal cell gap was determined to be around 31.3 μm for the BMII electrolyte system, and around 75.5 μm for the LiI electrolyte system in terms of the energy-conversion efficiency.

Performance of FTO-free conductive graphene-based counter electrodes for dye-sensitized solar cells

RSC Advances ◽  
2016 ◽  
Vol 6 (47) ◽  
pp. 41287-41293 ◽  
Author(s):  
Beili Pang ◽  
Lifeng Dong ◽  
Shuai Ma ◽  
Hongzhou Dong ◽  
Liyan Yu
Keyword(s):  
Solar Cells ◽  
Network Structure ◽  
Counter Electrode ◽  
Dye Sensitized Solar Cells ◽  
Energy Conversion Efficiency ◽  
Counter Electrodes ◽  
Dye Sensitized ◽  
Free Graphene ◽  
Modified Graphene ◽  
Sensitized Solar Cells

Network structure graphene is used as an efficient counter electrode for DSSCs which is made from modified graphene after UV irradiation. The DSSCs with FTO-free graphene-based counter electrode exhibit an energy conversion efficiency of 9.33%.

Carbon nanotube-carbon black hybrid counter electrodes for dye-sensitized solar cells and the effect on charge transfer kinetics

2021 ◽  
Author(s):  
Christian Abel Cruz-Gutiérrez ◽  
Rosa María Félix-Navarro ◽  
Julio Cesar Calva-Yañez ◽  
Carolina Silva-Carrillo ◽  
Shu Wai Lin-Ho ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Carbon Nanotube ◽  
Carbon Black ◽  
Dye Sensitized Solar Cells ◽  
Counter Electrodes ◽  
Dye Sensitized ◽  
Sensitized Solar Cells
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