Simpson Catherine, Clarke Tracey M, MacQueen Rowan W, Cheng Yuen Yap, Trevitt Adam J, Mozer Attila J, Wagner Pawel, Schmidt Timothy W, Nattestad Andrew
School of Chemistry, The University of Wollongong, Wollongong, NSW 2522, Australia.
Phys Chem Chem Phys. 2015 Oct 14;17(38):24826-30. doi: 10.1039/c5cp04825g.
A new mechanism of charge photogeneration is demonstrated for the first time, based on organic molecular structures. This intermediate band approach, integrated into a dye-sensitised solar cell configuration is shown to generate charges upon illumination with low energy photons. Specifically 610 nm photoexcitation of Pt porphyrins, through a series of energy transfer steps and triplet-triplet annihilation, excites a higher energy absorption onset molecule, which is then capable of charge injection into TiO2. Transient absorption measurements reveal further detail of the processes involved.
基于有机分子结构，首次证明了一种新的电荷光生机制。这种中间带方法集成到染料敏化太阳能电池配置中，结果表明在低能量光子照射下会产生电荷。具体来说，通过一系列能量转移步骤和三重态-三重态湮灭，对铂卟啉进行610纳米的光激发，会激发一个更高能量吸收起始分子，该分子随后能够将电荷注入二氧化钛。瞬态吸收测量揭示了所涉及过程的更多细节。
