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Molecular Design of Efficient Organic D–A– –A Dye Featuring Triphenylamine as Donor Fragment for Application in Dye‐Sensitized Solar Cells
ChemSusChem ( IF 8.4 ) Pub Date : 2018-01-17 , DOI: 10.1002/cssc.201701949
Parnian Ferdowsi 1, 2 , Yasemin Saygili 2 , Weiwei Zhang 3 , Tomas Edvinson 4 , Ladislav Kavan 3, 5 , Javad Mokhtari 1 , Shaik M. Zakeeruddin 3 , Michael Grätzel 3 , Anders Hagfeldt 2
Affiliation  

A metal‐free organic sensitizer, suitable for the application in dye‐sensitized solar cells (DSSCs), has been designed, synthesized and characterized both experimentally and theoretically. The structure of the novel donor–acceptor–π‐bridge–acceptor (D–A–π–A) dye incorporates a triphenylamine (TPA) segment and 4‐(benzo[c][1,2,5]thiadiazol‐4‐ylethynyl)benzoic acid (BTEBA). The triphenylamine unit is widely used as an electron donor for photosensitizers, owing to its nonplanar molecular configuration and excellent electron‐donating capability, whereas 4‐(benzo[c][1,2,5]thiadiazol‐4‐ylethynyl)benzoic acid is used as an electron acceptor unit. The influences of I3/I, [Co(bpy)3]3+/2+ and [Cu(tmby)2]2+/+ (tmby=4,4′,6,6′‐tetramethyl‐2,2′‐bipyridine) as redox electrolytes on the DSSC device performance were also investigated. The maximal monochromatic incident photon‐to‐current conversion efficiency (IPCE) reached 81 % and the solar light to electrical energy conversion efficiency of devices with [Cu(tmby)2]2+/+ reached 7.15 %. The devices with [Co(bpy)3]3+/2+ and I3/I electrolytes gave efficiencies of 5.22 % and 6.14 %, respectively. The lowest device performance with a [Co(bpy)3]3+/2+‐based electrolyte is attributed to increased charge recombination.

中文翻译:

以三苯胺为供体片段的高效有机D–A––A染料的分子设计,用于染料敏化太阳能电池

已经设计,合成和表征了适用于染料敏化太阳能电池(DSSC)的无金属有机敏化剂。新型供体-受体-π-桥-受体(D–A–π–A)染料的结构包含三苯胺(TPA)段和4-(苯并[c] [1,2,5]噻二唑-4-乙炔基)苯甲酸(BTEBA)。三苯胺单元由于其非平面分子构型和优异的供电子能力而被广泛用作光敏剂的电子供体,而4-(苯并[c] [1,2,5]噻二唑-4-基乙炔基)苯甲酸是光敏剂的电子供体。用作电子受体单元。的我的影响3 - / I -,[CO(BPY)3 ] 3 + / 2 +和[Cu(上tmby)2 ]还研究了2 + / +(tmby = 4,4',6,6'-四甲基-2,2'-联吡啶)对DSSC器件性能的影响。[Cu(tmby)2 ] 2 + / +的最大单色入射光子-电流转换效率(IPCE)达到81%,太阳光到电能的转换效率达到7.15%。用[CO(BPY)的装置3 ] 3 + / 2 +,我3 - / I -电解质得到的分别5.22%和6.14%,效率。含[Co(bpy)3 ] 3 + / 2 +的电解质性能最低的原因是电荷重组增加。
更新日期:2018-01-17
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