Cr-doped TiO2 nanotubes with a double-layer model: An effective way to improve the efficiency of dye-sensitized solar cells

2018 ◽  
Vol 458 ◽  
pp. 523-528 ◽  
Author(s):  
Huy Hao Nguyen ◽  
Gobinda Gyawali ◽  
Jeong Sang Hoon ◽  
Tohru Sekino ◽  
Soo Wohn Lee
Keyword(s):  
Solar Cells ◽  
Double Layer ◽  
Tio2 Nanotubes ◽  
Dye Sensitized Solar Cells ◽  
Layer Model ◽  
Doped Tio2 ◽  
Dye Sensitized ◽  
Double Layer Model ◽  
Sensitized Solar Cells

scholarly journals Improved Performance of Dye-Sensitized Solar Cells with TiO2 Nanoparticles/Zn-Doped TiO2 Hollow Fiber Photoanodes

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2922 ◽  
Author(s):  
Zainal Arifin ◽  
Suyitno Suyitno ◽  
Syamsul Hadi ◽  
Bayu Sutanto
Keyword(s):  
Solar Cells ◽  
Tio2 Nanoparticles ◽  
Double Layer ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Photocurrent Density ◽  
Light Transmittance ◽  
Doped Tio2 ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In this study, dye-sensitized solar cells (DSSCs) were fabricated using double-layer photoanodes consisting of TiO2 nanoparticles (NPs) and Zn-doped TiO2 hollow fibers (HFs). The TiO2 HFs were prepared by co-axial electrospinning and used as the light-scattering layer in the DSSC. The thickness variations of the TiO2 NP and Zn-doped TiO2 HF photoanode layers affect the performance of the DSSC, especially the short-circuit photocurrent density. The thickness of the TiO2 NP layer significantly affected the absorbance of photons and N719 dye molecules in the double-layer photoanode, while that of the Zn-doped TiO2 HF layer affected the scattering of light, as indicated by the low light transmittance in the photoanode. Conventional DSSCs consist of single-layer photoanodes, and exhibit relatively low efficiency, i.e., 1.293% and 0.89% for TiO2 NP and Zn-doped TiO2 HF, respectively. However, herein, the highest efficiency of the DSSC (3.122%) was achieved with a 15 μm NP-5 μm HF photoanode, for which the short-circuit photocurrent density, open-circuit photovoltage, and fill factor were 15.81 mA/cm2, 0.566 V, and 34.91%, respectively.

Efficient dye-sensitized solar cells based on CNT-derived TiO2 nanotubes and Nb-doped TiO2 nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (103) ◽  
pp. 101737-101744 ◽  
Author(s):  
H. Mokarami Ghartavol ◽  
M. R. Mohammadi ◽  
A. Afshar ◽  
F. Chau-Nan Hong ◽  
Yeau-Ren Jeng
Keyword(s):  
Solar Cells ◽  
Tio2 Nanoparticles ◽  
Tio2 Nanotubes ◽  
Dye Sensitized Solar Cells ◽  
Doped Tio2 ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

We report the use of Nb-doped TiO2 photoelectrodes incorporating CNT-derived TiO2 nanotubes as a facile strategy to enhance the efficiency of DSSCs.

scholarly journals Electronic, Structural, and Optical Structure of Mono-Doped and Co-Doped (210) TiO2 Brookite Surfaces for Application in Dye-Sensitized Solar Cells—A First Principles Study

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3918
Author(s):  
Ratshilumela S. Dima ◽  
Lutendo Phuthu ◽  
Nnditshedzeni E. Maluta ◽  
Joseph K. Kirui ◽  
Rapela R. Maphanga
Keyword(s):  
Solar Cells ◽  
Band Gap ◽  
Dye Sensitized Solar Cells ◽  
Visible Region ◽  
Electromagnetic Spectrum ◽  
Doped Tio2 ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Co Doped ◽  
Optical Structure

Titanium dioxide (TiO2) polymorphs have recently gained a lot of attention in dye-sensitized solar cells (DSSCs). The brookite polymorph, among other TiO2 polymorphs, is now becoming the focus of research in DSSC applications, despite the difficulties in obtaining it as a pure phase experimentally. The current theoretical study used different nonmetals (C, S and N) and (C-S, C-N and S-N) as dopants and co-dopants, respectively, to investigate the effects of mono-doping and co-doping on the electronic, structural, and optical structure properties of (210) TiO2 brookite surfaces, which is the most exposed surface of brookite. The results show that due to the narrowing of the band gap and the presence of impurity levels in the band gap, all mono-doped and co-doped TiO2 brookite (210) surfaces exhibit some redshift. In particular, the C-doped, and C-N co-doped TiO2 brookite (210) surfaces exhibit better absorption in the visible region of the electromagnetic spectrum in comparison to the pure, S-doped, N-doped, C-S co-doped and N-S co-doped TiO2 brookite (210) surfaces.

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