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首页> 外文期刊>Chemistry: A European journal >Thieno[3,4-b]thiophene-based organic dyes for dye-sensitized solar cells
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Thieno[3,4-b]thiophene-based organic dyes for dye-sensitized solar cells

机译：噻吩[3,4-b]噻吩基有机染料用于染料敏化太阳能电池

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摘要

New dipolar sensitizers containing an ethyl thieno[3,4-b]thiophene-2- carboxylate (ETTC) entity in the conjugated spacer have been synthesized in two isomeric forms. These compounds were used as the sensitizers of n-type dye-sensitized solar cells (DSSCs). The best conversion efficiency (5.31 %) reaches approximately 70 % of the N719-based (7.41 %) DSSC fabricated and measured under similar conditions. The ETTC-containing compounds exhibit a bathochromic shift of the absorption compared to their thiophene congeners due to the quinoid effect, however, charge-trapping at the ester group of ETTC was found to jeopardize the electron injection and lower the cell efficiency. Charge trapping is alleviated as the ester group of ETTC is replaced with a hydrogen atom, as evidenced from the theoretical computation.
机译：已经合成了两种同分异构形式的在共轭间隔基中包含噻吩并[3,4-b]噻吩-2-羧酸乙酯（ETTC）实体的新型偶极敏化剂。这些化合物被用作n型染料敏化太阳能电池（DSSC）的敏化剂。最佳转换效率（5.31％）达到在相似条件下制造和测量的基于N719的DSSC（7.41％）的大约70％。含ETTC的化合物由于其醌类效应，与其噻吩同类物相比，显示出吸收的红移，但是，发现ETTC的酯基处的电荷俘获会危害电子注入并降低电池效率。理论计算证明，由于ETTC的酯基被氢原子取代，因此电荷捕获得以缓解。

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