Photoinduced Charge-Carrier Generation in Epitaxial MOF Thin Films: High Efficiency as a Result of an Indirect Electronic Band Gap?
Dr. Jinxuan Liu, Wencai Zhou, Jianxi Liu, Dr. Ian Howard, Dr. Goran Kilibarda, Dr. Sabine Schlabach, Damien Coupry, Dr. Matthew Addicoat, Satoru Yoneda, Yusuke Tsutsui, Dr. Tsuneaki Sakurai, Prof. Dr. Shu Seki, Dr. Zhengbang Wang, Peter Lindemann, Dr. Engelbert Redel, Prof. Thomas Heine and Prof. Dr. Christof Wöll
Article first published online: 27 MAY 2015 | DOI: 10.1002/anie.201504133
Strictly periodic assemblies of porphyrin-units deposited on functionalized substrates can be used to realize solar cells with remarkable efficiency. In their Communication (10.1002/anie.201501862) J. Liu, C. Wöll and co-workers show by electronic-structure calculations that ordered arrays of porphyrins have a small dispersion of occupied and unoccupied bands leading to the formation of a small indirect band gap. Such ordered porphyrin metal–organic frameworks (MOFs) are then grown using a layer-by-layer liquid-phase epitaxy.