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TitleBroadband Near-Infrared to Visible Upconversion in Quantum Dot–Quantum Well Heterostructures
AuthorAyelet Teitelboim and Dan Oron*
Affiliation(s)Department of Physics of Complex Systems, Weizmann Institute of Science, Rehovot, Israel
PublishedACS Nano, 2016, 10 (1), pp 446–452 DOI: 10.1021/acsnano.5b05329
Keyword interband absorption; intraband absorption; near-infrared; quantum dot-quantum well; semiconductor nanocrystals; upconversion
AbstractUpconversion is a nonlinear process in which two, or more, long wavelength photons are converted to a shorter wavelength photon. It holds great promise for bioimaging, enabling spatially resolved imaging in a scattering specimen and for photovoltaic devices as a means to surpass the Shockley–Queisser efficiency limit. Here, we present dual near-infrared and visible emitting PbSe/CdSe/CdS nanocrystals able to upconvert a broad range of NIR wavelengths to visible emission at room temperature. ..


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