染料分子和分子轨道的物理取向对固态染料敏化太阳能电池性能的影响。
Effects of physical orientation of dye molecules and molecular orbitals on performance of solid-state dye sensitized solar cells.
作者信息
Pitigala P K D D P, Henary M M, Perera A G U
机构信息
Department of Physics, University of Sri Jayewardenepura, Gangodavila, Sri Lanka.
Center for Advance Material Research,, University of Sri Jayewardenepura, Sri Lanka.
出版信息
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。
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