Y-shaped metal-free D–π–(A)2 sensitizers for high-performance dye-sensitized solar cells
作者:Ryan Yeh-Yung Lin、Feng-Ling Wu、Chia-Hao Chang、Hsien-Hsin Chou、Tzu-Man Chuang、Te-Chun Chu、Chih-Yu Hsu、Ping-Wei Chen、Kuo-Chuan Ho、Yih-Hsing Lo、Jiann T. Lin
DOI:10.1039/c3ta14404f
日期:——
A series of 2,3,5-substituted thiophene-based metal-free dyes with two anchoring groups, DâÏâ(A)2 (DA), were synthesized for application in DSSCs. Different arylamines and 2-cyanoacrylic acid were used as the electron donor and the electron acceptor, respectively. The DSSC based on DA5 has the best power conversion efficiency (7.28%) among all devices, which is 2 times higher than that of S1 with only one anchoring group. With addition of a co-adsorbent, CDCA, the device performance of all the DA-based DSSCs are improved by 1.03 to 2-fold, with the best efficiency (7.87%) reaching 95% of that of the N719-based standard cell (8.28%). Compared with the S1 congener with only one anchor, the DA dyes can more effectively suppress charge recombination and increase electron injection efficiency, leading to higher open-circuit voltage and short-circuit current.
研究人员合成了一系列具有两个锚定基团 DâÏâ(A)2 (DA)的 2,3,5-取代噻吩基无金属染料,并将其应用于 DSSC。不同的芳基胺和 2-氰基丙烯酸分别用作电子供体和电子受体。基于 DA5 的 DSSC 在所有器件中具有最佳的功率转换效率(7.28%),比只有一个锚定基团的 S1 高出 2 倍。加入共吸附剂 CDCA 后,所有基于 DA 的 DSSC 的器件性能都提高了 1.03 至 2 倍,最佳效率(7.87%)达到了基于 N719 的标准电池(8.28%)的 95%。与只有一个锚的 S1 同系物相比,DA 染料能更有效地抑制电荷重组并提高电子注入效率,从而获得更高的开路电压和短路电流。