Dithienylpyrazine-based photosensitizers: Effect of swapping a connecting unit on optoelectronic properties and photovoltaic performances
作者:Maxime Godfroy、Cyril Aumaitre、Florent Caffy、Yann Kervella、Lydia Cabau、Laia Pellejà、Pascale Maldivi、Stéphanie Narbey、Frédéric Oswald、Emilio Palomares、Damien Joly、Renaud Demadrille
DOI:10.1016/j.dyepig.2017.07.022
日期:2017.11
only vary by the nature of the linker connecting a side dithienylpyrazine motive to a triarylamine-based donating unit and a phenylcyano-acrylic acid to provide the anchoring function. By simply swapping the aromatic connecting unit the range and intensity of the absorption of the compounds can be tuned, leading to orange and green dyes. The energy levels of the frontier orbitals are well-positioned
合成了三种D-π-A-π-A有机染料(QX1,DTQX1和TPZ1)并将其用作染料敏化太阳能电池(DSSC)中的光敏剂。分子仅通过将侧二噻吩并吡嗪侧基与基于三芳基胺的给体和苯基氰基丙烯酸连接以提供锚定功能的连接基的性质而变化。通过简单地交换芳族连接单元,可以调节化合物吸收的范围和强度,从而产生橙色和绿色染料。前沿轨道的能级是公定位成用于在DSSC使用有TiO 2作为光阳极和我- / I 3 -作为电解质中的氧化还原对。基于这些敏化剂的太阳能电池对吸收较窄的染料显示出高达8.6%的功率转换效率(PCE)。具有TPZ1的PCE较低归因于π共轭骨架的更quinoidal性质,这导致边界轨道的空间分布较差,并导致较低的电子注入和较高的重组率。