Effect of TiO2 surface treatment on electron transfer in dye-sensitized solar cells

2022 ◽  
Author(s):  
Suping Jia ◽  
Tong Cheng ◽  
Huinian Zhang ◽  
Hao Wang ◽  
Caihong Hao
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
High Efficiency ◽  
Surface Defects ◽  
Dye Sensitized Solar Cells ◽  
Charge Recombination ◽  
Defect States ◽  
Transport Pathway ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Defect states in the TiO2 nanoparticles can cause severe charge recombination and poor electron-transport efficiency when used as a photoanode in dye-sensitized solar cells (DSSCs). Herein, we report a simple and practical way to passivate the surface defects of TiO2 through hydrothermal treating with acetic acid and H2SO4, introducing a high percentage of 101 facets and sulfonic acid functional groups on the TiO2 surface. A high efficiency of 8.12% has been achieved, which is 14% higher than that of untreated TiO2 under the same condition. EIS results prove that the multiacid-treated TiO2 can promote electron transport and reduce charge recombination at the interface of the TiO2 and electrolyte. This work provides an efficient approach to engineer the electron-transport pathway in DSSCs.

Vanadium oxide as new charge recombination blocking layer for high efficiency dye-sensitized solar cells

Nano Energy ◽  
2015 ◽  
Vol 13 ◽  
pp. 368-375 ◽  
Author(s):  
Hytham Elbohy ◽  
Amit Thapa ◽  
Prashant Poudel ◽  
Nirmal Adhikary ◽  
Swaminathan Venkatesan ◽  
...  
Keyword(s):  
Solar Cells ◽  
Vanadium Oxide ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Charge Recombination ◽  
Blocking Layer ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Porous activated graphene nanoplatelets incorporated in TiO2 photoanodes for high-efficiency dye-sensitized solar cells

2015 ◽  
Vol 3 (16) ◽  
pp. 8890-8895 ◽  
Author(s):  
Huanmei Ma ◽  
Jianhua Tian ◽  
Lan Cui ◽  
Yuanyuan Liu ◽  
Shuming Bai ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Solar Cells ◽  
Porous Structure ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Graphene Nanoplatelets ◽  
Facile Synthesis ◽  
Transport Pathway ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

We report the facile synthesis of activated graphene nanoplatelets with a porous structure as a transport pathway for ions in the electrolyte and electron transfer medium in DSSCs.

Ultralong TiO2 (B) Nanowires/TiO2 Nanoparticles Composites for Rapid Electron Transport in Dye-Sensitized Solar Cells

2018 ◽  
Vol 18 (12) ◽  
pp. 8337-8344 ◽  
Author(s):  
Min Guo ◽  
Lu Yang ◽  
Jia Chen ◽  
Jun Zhang ◽  
Haijun Su ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Composite Structure ◽  
Dye Sensitized Solar Cells ◽  
Charge Collection ◽  
Transport Pathway ◽  
Electron Diffusion ◽  
Charge Collection Efficiency ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

The relatively small electron diffusion coefficient and high charge recombination rate of TiO2 nanoparticle (NP) film limit charge collection in TiO2 NP based dye-sensitized solar cells (DSSCs). Herein, ultralong bending TiO2 (B) nanowires (NWs) were introduced to TiO2 NP photoanode and expected to modify electron transport of DSSCs. The TiO2 (B) NWs/TiO2 NP composite structure was prepared by a facial process combining the stirring hydrothermal method with mechanical mixing method. When the composite structure was applied to DSSCs, the rapid electron transport pathway was formed in photoanode, which was clarified by the small electron transport resistance and long electron diffusion length, improving the charge collection efficiency. Moreover, the scattering effect of TiO2 (B) NWs could enhance the light harvesting, and thus improve the power conversion efficiency (PCE) of DSSCs. The excellent electronic and optical characteristics of TiO2 (B) NWs yield the maximum enhancement of PCE (36.4%) when 50% (wt.%) TiO2 (B) NWs was integrated into TiO2 NP based DSSC. The work provides new insights into the design and tailoring nanowires to enhance the PCE of DSSCs for practical applications.

Continuous electron transport pathways constructed in TiO2 sub-microsphere films for high-performance dye-sensitized solar cells

RSC Advances ◽  
2015 ◽  
Vol 5 (23) ◽  
pp. 17493-17500 ◽  
Author(s):  
Yong Ding ◽  
Yanmei Ma ◽  
Li Tao ◽  
Linhua Hu ◽  
Guang Li ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
High Performance ◽  
Dye Sensitized Solar Cells ◽  
Transport Pathway ◽  
Transport Pathways ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Electron Transport Pathway

Different concentrations of TiO2 nanocrystallines are introduced into the sub-microspheres of photoanodes to construct a continuous electron transport pathway for high-performance DSSCs.

Plasmonic, interior-decorated, one-dimensional hierarchical nanotubes for high-efficiency, solid-state, dye-sensitized solar cells

2015 ◽  
Vol 3 (19) ◽  
pp. 10439-10447 ◽  
Author(s):  
Sung Hoon Ahn ◽  
Dong Jun Kim ◽  
Won Seok Chi ◽  
Jong Hak Kim
Keyword(s):  
Solar Cells ◽  
Light Scattering ◽  
Solid State ◽  
Electron Transport ◽  
Surface Area ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
One Dimensional ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

1D, hierarchical, hetero-nanotube photoanodes (Au@SnO2@TNSs), were prepared with a large surface area, excellent electron transport, and improved light scattering. The resulting solid-state DSSCs had enhanced efficiency up to 8.4% at 100 mW cm−2.

scholarly journals High efficiency dye-sensitized solar cells with VOC–JSC trade off eradication by interfacial engineering of the photoanode|electrolyte interface

RSC Advances ◽  
2019 ◽  
Vol 9 (69) ◽  
pp. 40292-40300
Author(s):  
Anantharaj Gopalraman ◽  
Subbian Karuppuchamy ◽  
Saranyan Vijayaraghavan
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Surface States ◽  
Trade Off ◽  
Interfacial Engineering ◽  
Dye Sensitized ◽  
Electrolyte Interface ◽  
Sensitized Solar Cells

VOC–JSC trade off is eliminated. Newly created surface states by OA in TiO2 facilitated the charge transfer kinetics.

scholarly journals Ruthenium Sensitizers and Their Applications in Dye-Sensitized Solar Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-21 ◽  
Author(s):  
Yuancheng Qin ◽  
Qiang Peng
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Low Cost ◽  
Dye Sensitized Solar Cells ◽  
Ruthenium Complexes ◽  
Practical Applications ◽  
Photovoltaic Energy ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Excellent Stability

Dye-sensitized solar cells (DSSCs) have attracted considerable attention in recent years due to the possibility of low-cost conversion of photovoltaic energy. The DSSCs-based ruthenium complexes as sensitizers show high efficiency and excellent stability, implying potential practical applications. This review focuses on recent advances in design and preparation of efficient ruthenium sensitizers and their applications in DSSCs, including thiocyanate ruthenium sensitizers and thiocyanate-free ruthenium sensitizers.

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