Liu, ZhihongHuang, JiandongJoshi, Pooran C.Voutsas, Apostolos T.Hartzell, JohnCapasso, FedericoBao, Jiming2017-07-112010Liu, Zhihong, Jiandong Huang, Pooran C. Joshi, Apostolos T. Voutsas, John Hartzell, Federico Capasso, and Jiming Bao. 2010. “Polarity-Controlled Visible/infrared Electroluminescence in Si-nanocrystal/Si Light-Emitting Devices.” Applied Physics Letters 97 (7): 071112. doi:10.1063/1.3480403.0003-6951http://nrs.harvard.edu/urn-3:HUL.InstRepos:33372440We report the demonstration of a room-temperature visible/infrared color-switchable light-emitting device comprising a Si nanocrystal-embedded silicon oxide thin film on a p-type Si substrate. The device emits band-edge infrared light from the silicon substrate when the substrate is positively forward biased with respect to the Si-nanocrystal film. Under reverse bias, visible emission from the Si-nanocrystal film is observed. Compared to the photoluminescence of the Si-nanocrystal film, the visible electroluminescence is broader and blueshifted to shorter wavelength, and is ascribed to impact ionization in the Si-nanocrystal/SiO2 film.en-USJournal Article2017-07-1110.1063/1.3480403