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A highly selective and self-powered gas sensor via organic surface functionalization of p-Si/n-ZnO diodes

: Hoffmann, M.W.G.; Mayrhofer, L.; Casals, O.; Caccamo, L.; Hernandez-Ramirez, F.; Lilienkamp, G.; Daum, W.; Moseler, M.; Waag, A.; Shen, H.; Prades, J.D.


Advanced Materials 26 (2014), No.47, pp.8017-8022
ISSN: 0935-9648
ISSN: 1521-4095
European Commission EC
Bundesministerium für Bildung und Forschung BMBF
03x5512; NanoFutur
Journal Article
Fraunhofer IWM ()
selective sensing; self-powered; density functional theory (DFT); self-assembled monolayers; hybrid materials

Selectivity and low power consumption are major challenges in the development of sophisticated gas sensor devices. A sensor system is presented that unifies selective sensor-gas interactions and energy-harvesting properties, using defined organic-inorganic hybrid materials. Simulations of chemical-binding interactions and the consequent electronic surface modulation give more insight into the complex sensing mechanism of selective gas detection.