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White light-emitting diodes (WLEDs) were fabricated by combining blue InGaN chips with luminescent colloidal core-shell CdSe-ZnSe quantum dots (QDs). The core-shell CdSe-ZnSe QDs synthesized by thermal deposition approach exhibited high photoluminescence efficiency with a quantum yield more than /spl sim/40%, and size-tunable emission wavelengths from 510 to 620 nm. Three-band red-green-blue WLED was successfully assembled by blue InGaN chips and green-emitting and red-emitting CdSe-ZnSe QDs. Based on QDs with flexibly selected color, the WLEDs exhibited white light with a CIE-1931 coordinate of (0.33, 0.33) and color rendering index R/sub a/ of 91.
Chen et al. (Thu,) studied this question.
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