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Enhancing the temporal stability of DSSCs with novel vinylpyrimidine anchoring and accepting group
Dyes and Pigments ( IF 4.1 ) Pub Date : 2022-04-14 , DOI: 10.1016/j.dyepig.2022.110310
Isolda Duerto 1 , Santiago Sarasa 1 , Daniel Barrios 2 , Jesús Orduna 1 , Belén Villacampa 2 , María-Jesús Blesa 1
Affiliation  

Three compounds based on aniline, thiophene and vinylpyrimidine as anchoring group have been prepared and studied as light harvesting units for dye-sensitized solar cells (DSSCs). They comprise thiophenyl π-spacer systems with one or two thiophenes (AT-Pyri, ATT-Pyri) and aniline as donor which is functionalized, in one case, with an hydroxyl group (HO-AT-Pyri). The bithiophene based dye (ATT-Pyri) shows higher extinction coefficients and smaller transition energy, as well as broader absorption spectrum. Thus, despite lower dye uptake, devices based on one thiophene and with the hydroxyl group (HO-AT-Pyri) have slightly higher power conversion efficiencies (η) as compared with the analogous dye without this group (AT-Pyri). However, the best performing device is based on the dye with bithiophene bridge (ATT-Pyri) when a co-adsorbent is added to avoid the aggregation of the dye. The photovoltaic parameters of cells based on these vinylpyrimidine dyes are enhanced over 1000 h, especially for ATT-Pyri devices, which reach a η = 6,4%.



中文翻译:

用新型乙烯基嘧啶锚定和接受基团增强 DSSC 的时间稳定性

已经制备并研究了三种基于苯胺、噻吩和乙烯基嘧啶作为锚定基团的化合物作为染料敏化太阳能电池 (DSSC) 的光收集单元。它们包含具有一个或两个噻吩( AT-Pyri、ATT-Pyri)和苯胺作为供体的苯硫基 π-间隔系统,在一种情况下,用羟基(HO-AT-Pyri)官能化。基于二噻吩的染料 ( ATT-Pyri ) 具有更高的消光系数和更小的跃迁能,以及更宽的吸收光谱。因此,尽管染料吸收率较低,但与不含该基团的类似染料相比,基于一种噻吩并带有羟基 ( HO-AT-Pyri ) 的器件具有稍高的功率转换效率 (η) (AT-Pyri)。然而,当添加共吸附剂以避免染料聚集时,性能最佳的装置是基于具有二噻吩桥的染料 ( ATT-Pyri) 。基于这些乙烯基嘧啶染料的电池的光伏参数在 1000 小时内得到增强,特别是对于ATT-Pyri器件,其达到 η = 6.4%。

更新日期:2022-04-14
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