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Core/multishell-structured semiconductor nanocrystals (NCs) are prepared in multigram amounts through a one-pot process without a core-separation step (see figure and cover). The NCs show a maximum quantum efficiency of 85 % at a controlled wavelength and strong photostability against UV-light bleaching. The NCs are applied as phosphors on UV-light-emitting diodes (390 nm source), which emit light at 620 nm with a 48 % power conversion efficiency.
Lim et al. (2007) studied this question.