An intermediate band dye-sensitised solar cell using triplet–triplet annihilation

• DOI: 10.1039/c5cp04825g
• Publication Date: 2015-08-19T16:30:18Z
• Authors: Catherine Simpson; Tracey M. Clarke; Rowan W. MacQueen; Yuen Yap Cheng; Adam J. Trevitt; Attila J. Mozer; Pawel Wagner; Timothy W. Schmidt; Andrew Nattestad
• Keywords: Photoexcitation; Annihilation

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 shown to generate charges upon illumination with low energy photons. Specifically 610 nm photoexcitation Pt porphyrins, through series transfer steps and triplet-triplet annihilation, excites higher absorption onset molecule, which then capable injection TiO2. Transient measurements reveal further detail processes involved.