Open-shell donor–π–acceptor conjugated metal-free dyes for dye-sensitized solar cells

2020 ◽  
Vol 5 (9) ◽  
pp. 1477-1490 ◽  
Author(s):  
Md Abdus Sabuj ◽  
Neeraj Rai
Keyword(s):  
Solar Cells ◽  
Near Infrared ◽  
Dye Sensitized Solar Cells ◽  
Open Shell ◽  
Infrared Region ◽  
Metal Free ◽  
Dye Sensitized ◽  
Diradical Character ◽  
Near Infrared Region ◽  
Sensitized Solar Cells

Open-shell dyes with small diradical character (y < 0.10) lead to absorption in the near-infrared region.

scholarly journals A Visible-NIR Responsive Dye-Sensitized Solar Cell Based on Diatom Frustules and Cosensitization of Photopigments from Diatom and Purple Bacteria

2020 ◽  
Vol 2020 ◽  
pp. 1-10 ◽  
Author(s):  
Xixiang Xiao ◽  
Xiaobo Zhang ◽  
Haiyang Su ◽  
Shicheng Chen ◽  
Zhihui He ◽  
...  
Keyword(s):  
Solar Cells ◽  
Composite Film ◽  
Near Infrared ◽  
Dye Sensitized Solar Cells ◽  
Infrared Region ◽  
Diatom Frustule ◽  
Layer Film ◽  
Dye Sensitized ◽  
Near Infrared Region ◽  
Sensitized Solar Cells

Diatoms exhibit high solar energy harvesting efficiency due to their remarkably organized, hierarchical micro/nanoporous, light-trapping, and scattering frustules. At present, few studies focus on cosensitization of natural near-infrared dye to expand the spectral response of dye-sensitized solar cells. In this study, the diatom frustule-TiO2 (12 : 5) composite film was prepared and assembled it on the TiO2 electrode. Compared to the single TiO2 layer film, diatom frustule-TiO2 (12 : 5) composite film sensitized by diatom’s dye showed the conversion efficiency of 0.719%. To expand the light-harvesting response to near-infrared region spectra, the cosensitized dyes were used to fabricate the visible-near-infrared responsive dye-sensitized solar cells. The cosensitization diatom frustule-TiO2 (12 : 5) composite film exhibited two distinct absorption bands in the near-infrared region and reached a higher conversion efficiency of 1.321%, which was approximately 1.4 or 1.7 folds higher than that of cosensitization double-TiO2 film or single TiO2 layer film, respectively, and approximately 3.7 or 1.7 folds higher than that of the single TiO2 layer film sensitized by diatom dye or purple bacterial dye, respectively. The results showed that the combination between diatom frustule-TiO2 with cosensitization natural dyes could significantly improve the photoelectric performance of visible-near-infrared responsive dye-sensitized solar cells.

Efficient electron transport in tetrapod-like ZnO metal-free dye-sensitized solar cells

2009 ◽  
Vol 2 (6) ◽  
pp. 694 ◽  
Author(s):  
Wei-Hao Chiu ◽  
Chia-Hua Lee ◽  
Hsin-Ming Cheng ◽  
Hsiu-Fen Lin ◽  
Shih-Chieh Liao ◽  
...  
Keyword(s):  
Solar Cells ◽  
Electron Transport ◽  
Dye Sensitized Solar Cells ◽  
Metal Free ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Photovoltaic performance of natural metal free photo-sensitizer for TiO2 based dye-sensitized solar cells

Optik ◽  
2019 ◽  
Vol 181 ◽  
pp. 619-626 ◽  
Author(s):  
A. Arulraj ◽  
G. Senguttuvan ◽  
S. Veeramani ◽  
V. Sivakumar ◽  
B. Subramanian
Keyword(s):  
Solar Cells ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Metal Free ◽  
Dye Sensitized ◽  
Photo Sensitizer ◽  
Sensitized Solar Cells
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