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Research on white light-emitting diodes(LEDs) based on multi-color-emitting quantum dots(QDs) is carried out in this Letter.The equations of luminous efficiency(LE),color rendering index(CRI),chromaticity coordinates(x,y),and color temperature(T_c) of white LEDs are obtained,according to the spectral-LE function Φof LED chips and QDs.The calculated results indicate that the values of the performance parameters of QD-based white LEDs are closely related and proportional to the QDs’ fluorescence spectra,and white LEDs with a high LE and a high CRI may be fabricated based on QDs.We have provided theoretical guidance for preparing such white LEDs.
Research on white light-emitting diodes (LEDs) based on multi-color-emitting quantum dots (QDs) is carried out in this Letter. These equations of luminous efficiency (LE), color rendering index (CRI), chromaticity coordinates (x, y), and color temperature (T_c) of white LEDs are obtained, according to the spectral-LE function Φ of LED chips and QDs. The calculated results indicate that the values of the performance parameters of QD-based white LEDs are closely related and proportional to the QDs’ fluorescence spectra, and white LEDs with a high LE and a high CRI may be fabricated based on QDs.We have provided theoretical guidance for preparing such white LEDs.