Abstract
Mn-doped ZnSe nanocrystals (Mn:ZnSe d-dots) that emit white light were synthesized in aqueous media in microfluidic reactors. White light emission from Mn:ZnSe d-dots was a result of combined emission of blue light (emission from non-coordinated surface selenium sites) and yellow light (4T1 → 6A1 emission from Mn2+ ions). Emission from non-coordinated surface selenium sites was realized by adjusting the ratio of the flow volumes of [Zn]/[Mn] and the mass of stabilizer added. Photoluminescence from the Mn:ZnSe d-dots was easily tuned from 580 to 602 nm by regulating flow volume. Under the optimal experimental conditions, Mn:ZnSe d-dots that emit white light with a quantum yield of about 10.2% were fabricated.
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