Phenoxazine Dyes for Dye‐Sensitized Solar Cells: Relationship Between Molecular Structure and Electron Lifetime
作者:Karl Martin Karlsson、Xiao Jiang、Susanna K Eriksson、Erik Gabrielsson、Håkan Rensmo、Anders Hagfeldt、Licheng Sun
DOI:10.1002/chem.201003730
日期:2011.5.27
metal‐free organic dyes with a core phenoxazine chromophore have been synthesized and tested as sensitizers in dye‐sensitizedsolarcells. Overall conversion efficiencies of 6.03–7.40 % were reached under standard AM 1.5G illumination at a light intensity of 100 mW cm−2. A clear trend in electronlifetime could be seen; a dye with a furan‐conjugated linker showed a shorter lifetime relative to dyes with the
已经合成了一系列具有核心吩恶嗪发色团的无金属有机染料,并在染料敏化太阳能电池中用作敏化剂进行了测试。在标准AM 1.5G照明下,光强度为100 mW cm -2时,总转换效率达到6.03-7.40%。可以看出电子寿命有明显的趋势。与具有直接连接到吩恶嗪上的受体基团的染料相比,具有呋喃共轭的接头的染料显示出较短的寿命。在吩恶嗪的7位上增加一个带有绝缘的烷氧基链的额外供体单元,可以进一步延长寿命,并且与电解质中的添加剂一起提高导带,可以提供800 mV的开路电压取得成就。从TiO 2颗粒上吸附的染料的光电子能谱和X射线吸收光谱,可以得出结论,激发主要是氰基特性的(即,平均而言,染料分子从表面站立并指出)。的TiO 2颗粒)。