Significantly improved performance of dye-sensitized solar cells by optimizing organic dyes with pyrrole as the isolation spacer and utilizing alkyl chain engineering

2018 ◽  
Vol 6 (44) ◽  
pp. 22256-22265 ◽  
Author(s):  
Jinfeng Wang ◽  
Siwei Liu ◽  
Zhaofei Chai ◽  
Kai Chang ◽  
Manman Fang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Alkyl Chain ◽  
Organic Dyes ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Improved Performance ◽  
Conversion Efficiencies ◽  
Sensitized Solar Cells ◽  
Interfacial Charge

The conversion efficiencies of dye sensitized solar cells were largely enhanced by the optimization of intramolecular and interfacial charge transfer.

scholarly journals Sustainable Organic Dyes from Winemaking Lees for Photoelectrochemical Dye-Sensitized Solar Cells

2020 ◽  
Vol 10 (6) ◽  
pp. 2149
Author(s):  
Manuel Meneghetti ◽  
Aldo Talon ◽  
Elti Cattaruzza ◽  
Emilio Celotti ◽  
Elisabetta Bellantuono ◽  
...  
Keyword(s):  
Solar Cells ◽  
Organic Dyes ◽  
Low Cost ◽  
Dye Sensitized Solar Cells ◽  
Cost Effective ◽  
Simulated Solar Light ◽  
Dye Sensitized ◽  
Different Temperatures ◽  
Conversion Efficiencies ◽  
Sensitized Solar Cells

During the last two decades, Dye Sensitized Solar Cells (DSSCs) have received a great deal of attention as a promising, low-cost alternative to conventional silicon photovoltaic devices. Natural dye molecules can be used as a sensitizer for their low cost, good light absorbance, easy preparation process, and biodegradability. In this study, dyes were obtained from wine lees, the last by-product of winemaking process, supplied by a venetian winery (Italy). Polyphenols, like tannins and anthocyanins, which were extracted from winemaking lees, were adsorbed on a nanostructured ordered mesoporous titanium dioxide, previously treated at different temperatures (400–600 °C). Both dyes and titania semiconductor samples were studied with different techniques. The tests were carried out on prototypes to evaluate the cell power and the photocurrent generated under simulated solar light irradiation. The obtained solar energy conversion efficiencies are comparable to those that were reported in literature by using organic dyes extracted from vegetables, fruits, and plants. It is significant that these dyes are largely available and cost effective, since recovered from a waste otherwise to be disposed of, opening up a perspective of feasibility for inexpensive and environmentally friendly dye solar cells to generate green electricity and transforming agri-food waste into a resource.

Investigation of photovoltaic properties of dye-sensitized solar cells based on azo dyes contain various anchoring groups

2019 ◽  
Vol 48 (6) ◽  
pp. 481-486 ◽  
Author(s):  
Mozhgan Hosseinnezhad ◽  
Hanieh Shaki
Keyword(s):  
Solar Cells ◽  
Substituent Effect ◽  
Organic Dyes ◽  
Dye Sensitized Solar Cells ◽  
Photovoltaic Properties ◽  
Content Type ◽  
Dye Sensitized ◽  
Anchoring Groups ◽  
Conversion Efficiencies ◽  
Sensitized Solar Cells

Purpose The purpose of this paper is to study the substituent effect in dye-sensitized solar cells’ (DSSCs) performance. For this end, three new metal organic dyes with DPA structure were synthesized. For investigation of the substituent effect, two different anchoring groups, namely, 1,3-dioxo-1Hbenz[de]isoquinolin-2(3H)-yl)benzenesulfonamides and 1,8-naphthalimide, were used. Design/methodology/approach Three organic dyes based on azo were selected, which contain various electron donor groups. Absorption properties of purified dyes were studied in solution and on photoelectrode (TiO2 and ZnO) substrate. DSSCs were prepared to determine the photovoltaic performance of each photosensitizer. Findings The results showed that all organic dyes form J-aggregation on the photoanode substrate. Cyclic voltammetry results for all organic dyes ensured an energetically permissible and thermodynamically favorable charge transfer throughout the continuous cycle of photo-electric conversion. The results illustrate conversion efficiencies of cells based on solution Dyes 1, 2 and 3 and TiO2 as 3.44, 4.71 and 4.82 per cent, respectively. The conversion efficiencies of cells based on solution Dye 1, 2 and 3 and ZnO are 3.21, 4.09 and 4.14 per cent, respectively. Practical implications In this study, the development of effect of assembling materials, offering improved photovoltaic properties. Social implications Organic dye attracts more and more attention because of its low-cost, facile route synthesis and less-hazardous properties. Originality/value To the best of the authors’ knowledge, the effect of anchoring agent and nanostructure on DSSCs performance was investigated for the first time.

Interfacial Charge-Transfer Loss in Dye-Sensitized Solar Cells

2013 ◽  
Vol 117 (6) ◽  
pp. 2734-2739 ◽  
Author(s):  
Dong-Won Park ◽  
Yonkil Jeong ◽  
Jongjin Lee ◽  
Jaeyoung Lee ◽  
Seung-Hyeon Moon
Keyword(s):  
Solar Cells ◽  
Charge Transfer ◽  
Dye Sensitized Solar Cells ◽  
Interfacial Charge Transfer ◽  
Dye Sensitized ◽  
Sensitized Solar Cells ◽  
Interfacial Charge

Accurate estimation of the photoelectric conversion efficiency of a series of anthracene-based organic dyes for dye-sensitized solar cells

2020 ◽  
Vol 8 (7) ◽  
pp. 2388-2399 ◽  
Author(s):  
Panpan Heng ◽  
Lemin Mao ◽  
Xugeng Guo ◽  
Li Wang ◽  
Jinglai Zhang
Keyword(s):  
Solar Cells ◽  
Optical Absorption ◽  
Organic Dyes ◽  
Dye Sensitized Solar Cells ◽  
Accurate Estimation ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Conversion Efficiencies ◽  
Sensitized Solar Cells

Studies demonstrate that our designed dyes 3 and 4 exhibit broad optical absorption in the 550–650 nm region and high photoelectric conversion efficiencies of over 32%.

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