Recent Advances of Novel Designs of Dyes for Dye Sensitized Solar Cells

He, Junjie; Chen, Shuxin; Wang, Tingting; Zeng, Heping

doi:10.6023/cjoc1105142

Cited by 6 publications

(1 citation statement)

References 11 publications

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“…当光子入射到染料时, 染料受到激发后会向光阳极注入电子, 而失去电子的染料则通过氧化还原电对获得电子回到基态, 而氧化还原电对则通过对电极接受外电路的电子, 从而完成整个电流回路, 可以说氧化还原电对在染料敏化电池中起着"承上启下"的关键作用. 在目前的研究中, 碘系氧化还原电对(I -/I 3 -)表现出了高效的电荷转移效率, 也是目前染料敏化太阳能电池中应用最广泛的一类氧化还原电对 [9] . 虽然碘系氧化还原电对表现出了较高的光电转化效率, 但是其本身也有一定的缺陷, 限制了其进一步的发展 [10,11] .…”

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A Novel Organic Disulfide/Thiolate Redox Mediator for Iodine-free Dye-sensitized Solar Cells

Yingzhuang¹,

Zheng²,

Zhang³

et al. 2015

Acta Chim. Sinica

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Over the last 20 years, much attention has been paid to renewable energy technology. Photovoltaic is a promising alternative to conventional fossil fuels. Dye-sensitized solar cells (DSCs) attract notable interest, not only due to their high efficiency and environmentally friendly nature, but also their easy fabrication and relatively low manufacture costs. Despite the high efficiencies, iodine/triiodine electrolytes have some disadvantages, such as the corrosion of the metallic electrodes and the sealing materials. It also absorbs visible light around 430 nm. Therefore, it is important to exploit the iodine-free redox couple in DSCs. An organic disulfide material of 2,5-dimercapto-1,3,4-thiadiazole (DMcT) is proved here to reduce and oxidize independently via homopolymerization and depolymerization. DMcT has been applied as cathode active material for lithium rechargeable batteries. Meanwhile, the self-redox property could be used as redox mediator in lieu of iodine/triiodine electrolytes. DMcT can be oxidized by self-polymerizing into PDMcT, which can be reduced by depolymerizing back to DMcT. In contrast to the conventional redox couples consisted of two different materials, DMcT can independently act as the redox mediator, which is the main difference between DMcT and the redox couples reported previously. Dye-sensitized solar cells consist of mesoporous TiO 2 , N719 dye, and this novel electrolyte achieved power conversion efficiency of 1.6% under 100 mW•cm-2 simulated sunlight (AM 1.5G) and a higher efficiency of 2.6% at weak illumination (13 mW•cm-2), implying its promising application prospect. Although the conversion efficiency is relatively low to the iodine/triiodine-based DSCs, this novel single self-redox mediator provides a new promising way to the iodine-free dye-sensitized solar cells.

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A Novel Organic Disulfide/Thiolate Redox Mediator for Iodine-free Dye-sensitized Solar Cells

Yingzhuang¹,

Zheng²,

Zhang³

et al. 2015

Acta Chim. Sinica

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Novel Organic Dyes Based on Bulky Tri(triphenylamine)‐Substituted Styrene for Dye‐Sensitized Solar Cells

Zhang

Han

et al. 2012

Chin. J. Chem.

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Three novel donor‐π‐acceptor (D‐π‐A) metal‐free organic dyes (TB, TS and TF) based on tri(triphenylamine)‐substituted styrene as donor with various conjugated linkers (benzene, thiophene and furan) were synthesized, characterized and used for the application of dye‐sensitized solar cells (DSSCs). Under the same condition, The photo‐to‐electrical conversion efficiency of the DSSCs sensitized with TB, TS and TF reach 1.84%, 4.10% and 4.52%, respectively, which are lower than that sensitized with R1 (5.02%) with one triphenylamine unit. The results suggest that these bulky donor‐based sensitizers are unfavorable to DSSCs.

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Highly Efficient Dye‐sensitized Solar Cells by Co‐sensitization of Organic Dyes and Co‐adsorbent Chenodeoxycholic Acid

Wei

Chen

et al. 2014

Chin. J. Chem.

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Approach to highly efficient dye‐sensitized solar cells (DSSCs) by co‐sensitization of organic dyes, AZ6+AZ5 with co‐adsorbent chenodeoxycholic acid (CDCA) is presented. The power conversion efficiencies (PCEs) of 8.55% and 8.31% are obtained from DSSCs co‐sensitized by AZ6 (0.3 mmol/L)+AZ5 (0.1 mmol/L) with CDCA concentration of 5 and 20 mmol/L in one step cocktail, respectively. The latter shows high stability in a period of 653 h under ambient conditions.

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Recent Advances of Novel Designs of Dyes for Dye Sensitized Solar Cells

Cited by 6 publications

References 11 publications

A Novel Organic Disulfide/Thiolate Redox Mediator for Iodine-free Dye-sensitized Solar Cells

A Novel Organic Disulfide/Thiolate Redox Mediator for Iodine-free Dye-sensitized Solar Cells

Novel Organic Dyes Based on Bulky Tri(triphenylamine)‐Substituted Styrene for Dye‐Sensitized Solar Cells

Highly Efficient Dye‐sensitized Solar Cells by Co‐sensitization of Organic Dyes and Co‐adsorbent Chenodeoxycholic Acid

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