Pitigala P K D D P, Henary M M, Perera A G U
Department of Physics, University of Sri Jayewardenepura, Gangodavila, Sri Lanka.
Center for Advance Material Research,, University of Sri Jayewardenepura, Sri Lanka.
Mater Today Proc. 2020;23(Pt 1):43-48. doi: 10.1016/j.matpr.2019.06.189. Epub 2019 Jul 10.
Performance of Dye-sensitized devices depends on the photon absorption and carrier injection properties of the sensitizer (dye). The orientation of the dye molecule affects the photon absorption cross-section, injection efficiency and carrier transport. These effects are studied, using three variants of cyanine dyes in -TiO/Dye/-CuSCN heterojunction. The results show correlation of dye-molecule's orientation on the short-circuit-photocurrent (I). The open-circuit-voltage (V) is also subjective. The orientation of the dye molecule influence the photon-harvesting efficiency and obstruct the hole-conductor penetrating onto the working-electrode. Additionally, Cumulative effects of e-e, e-h, spin-coupling and HOMO/LUMO distribution are identified.
染料敏化器件的性能取决于敏化剂（染料）的光子吸收和载流子注入特性。染料分子的取向会影响光子吸收截面、注入效率和载流子传输。使用-TiO/Dye/-CuSCN异质结中的三种菁染料变体对这些效应进行了研究。结果表明染料分子的取向与短路光电流（I）相关。开路电压（V）也受其影响。染料分子的取向会影响光子捕获效率，并阻碍空穴导体渗透到工作电极上。此外，还确定了电子-电子、电子-空穴、自旋耦合和最高占据分子轨道/最低未占分子轨道分布的累积效应。
