scholarly journals A Push–Pull Porphyrin Dimer with Multiple Electron-donating Groups for Dye-sensitized Solar Cells: Excellent Light-harvesting in Near-infrared Region

2016 ◽  
Vol 45 (9) ◽  
pp. 1126-1128 ◽  
Author(s):  
Tomohiro Higashino ◽  
Kenichi Sugiura ◽  
Yukihiro Tsuji ◽  
Shimpei Nimura ◽  
Seigo Ito ◽  
...  
Keyword(s):  
Solar Cells ◽  
Near Infrared ◽  
Light Harvesting ◽  
Dye Sensitized Solar Cells ◽  
Infrared Region ◽  
Dye Sensitized ◽  
Near Infrared Region ◽  
Electron Donating Groups ◽  
Sensitized Solar Cells ◽  
Porphyrin Dimer

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.

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.

Porphyrins as Potential Sensitizers for Dye-Sensitized Solar Cells

2010 ◽  
Vol 451 ◽  
pp. 29-40 ◽  
Author(s):  
Hiroshi Imahori
Keyword(s):  
Solar Cells ◽  
Near Infrared ◽  
Light Harvesting ◽  
Dye Sensitized Solar Cells ◽  
Soret Band ◽  
Cell Performance ◽  
Absorption Bands ◽  
Dye Sensitized ◽  
Highly Efficient ◽  
Sensitized Solar Cells

Recently, dye-sensitized solar cells have attracted much attention relevant to global environmental issues. So far ruthenium(II) bipyridyl complexes have proven to be the most efficient TiO2 sensitizers in dye-sensitized solar cells. However, the highest power conversion efficiency has been stagnated in recent years. More importantly, considering that ruthenium is rare and expensive, novel dyes without metal or using inexpensive metal are desirable for highly efficient dye-sensitized solar cells. To fulfill the requirement, it is crucial to develop inexpensive novel dyes that exhibit high efficiencies in terms of light-harvesting, charge separation, and charge collection. Porphyrins are important classes of potential sensitizers for highly efficient dye-sensitized solar cells owing to their photostability and potentially high light-harvesting capabilities that would allow applications in thinner, low-cost dye-sensitized solar cells. However, typical porphyrins possess an intense Soret band at 400 nm and moderate Q bands at 600 nm, which does not match solar energy distribution on the earth. Therefore, the unmatched light-harvesting property relative to the ruthenium complexes has limited the cell performance of porphyrin-sensitized TiO2 cells. Elongation of the -conjugation and loss of symmetry in porphyrins cause broadening and red-shift of the absorption bands together with an increasing intensity of the Q bands relative to that of the Soret band. On the basis of the strategy, the cell performance of porphyrin-sensitized solar cells has been improved remarkably by the enhanced light absorption. The efficiency of porphyrin-sensitized solar cells could be improved significantly if the dyes with larger red and near-infrared absorption could be developed.

scholarly journals A dual-functional NaLuF4:Yb3+/Er3+ material for enhancing photon harvesting in dye-sensitized solar cells

RSC Advances ◽  
2017 ◽  
Vol 7 (61) ◽  
pp. 38506-38511 ◽  
Author(s):  
Haiyong Guo ◽  
Zhen Hu ◽  
Li Zhao ◽  
Li Wan ◽  
Yadan Wu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Light Scattering ◽  
Near Infrared ◽  
Light Harvesting ◽  
Dye Sensitized Solar Cells ◽  
Infrared Light ◽  
Dye Sensitized ◽  
Dual Functional ◽  
New Strategy ◽  
Sensitized Solar Cells

A new strategy to improve the efficiency of dye-sensitized solar cells by using the external near-infrared light harvesting and light-scattering dual-functional upconversion (UC) material NaLuF4:Yb3+/Er3+ is proposed.

Co-sensitization promoted light harvesting for plastic dye-sensitized solar cells

2011 ◽  
Vol 196 (4) ◽  
pp. 2416-2421 ◽  
Author(s):  
Kun-Mu Lee ◽  
Ying-Chan Hsu ◽  
Masashi Ikegami ◽  
Tsutomu Miyasaka ◽  
K.R. Justin Thomas ◽  
...  
Keyword(s):  
Solar Cells ◽  
Light Harvesting ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells
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