Benzo[1,2-b:4,5-b′]dithiophene and benzo[1,2-b:4,5-b′]difuran based organic dipolar compounds for sensitized solar cells
作者:Yan-Zuo Lin、Chia-Wei Yeh、Po-Ting Chou、Motonori Watanabe、Yu-Hsuan Chang、Yuan Jay Chang、Tahsin J. Chow
DOI:10.1016/j.dyepig.2014.04.043
日期:2014.10
Novel organic dyes that consist of either a benzo[1,2-b:4,5-b′]dithiophene or a benzo[1,2-b:4,5-b′]difuran core exhibited remarkable solar-to-energy conversion efficiency in dye-sensitized solar cells. The planar geometry of bridge moiety and its bulky substituents helped the dyes to form a high quality monolayer on the surface of titanium oxide. A typical device displayed photon-to-current conversion
由苯并[1,2- b:4,5- b ']二噻吩或苯并[1,2- b:4,5- b ']二呋喃核组成的新型有机染料表现出显着的太阳能染料敏化太阳能电池的转换效率。桥部分的平面几何结构及其庞大的取代基帮助染料在氧化钛表面上形成了高质量的单层膜。典型的设备在380-575 nm范围内显示60%的光子-电流转换效率,短路光电流密度13.45 mA cm -2,开路光电压0.72 V和填充系数0.63,对应于总转换效率6.12%。在使用脱氧胆酸作为共吸收剂的测试中,观察到某些化合物的量子效率提高了8.37%。然而,对于另一些量子效率却下降了6.60–7.91%。后一结果表明,通过加入脱氧胆酸不能进一步改善某些薄膜的质量。借助TDDFT分析了光物理性质。