caa a22 4500 606243933 CHVBK 20210128101327.0 cr unu---uuuuu 210128e20150901xx s 000 0 eng 10.1007/s12596-015-0253-x doi (NATIONALLICENCE)springer-10.1007/s12596-015-0253-x Peng Xuefeng College of Science & Technology, NingBo University, 315212, NingBo, China aut Low-cost and high-color-quality white light emitting diodes based on CdSe/ZnS quantum dots [Elektronische Daten] [Xuefeng Peng] Low-cost and high-color-quality white light emitting diodes (WLEDs) have been realized based on CdSe/ZnS colloidal quantum dots (QDs). CdSe/ZnS QDs with different diameters and emission wavelengths were used as phosphors and coated on the unpackaged blue InGaN/GaN LED chips, the emission of QDs and the unabsorbed LED light collectively contribute to the white light generation. Drop-coating and layer-by-layer assembly techniques were used to integrate QDs on the LED chips. Comparison of the experimental results, we found layer-by-layer assembly method with larger QDs at the bottom were the suitable method to generate controllable white light emission. Using this easy and low cost method, WLED samples were fabricated using QD mixtures with one (‘single'), or two (‘dual') emission wavelengths. High-quality warm WLED were obtained with a correlated color temperature of CCT = 3778K, tristimulus coordinates of (x, y) = (0.36, 0.28) and color rending index of CRI = 80.8. The Optical Society of India, 2015 Warm white light nationallicence LED nationallicence Quantum dot nationallicence CdSe/ZnS nationallicence Journal of Optics Springer India 44/3(2015-09-01), 249-254 0972-8821 44:3<249 2015 44 12596 https://doi.org/10.1007/s12596-015-0253-x text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s12596-015-0253-x text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Peng Xuefeng College of Science & Technology, NingBo University, 315212, NingBo, China aut NATIONALLICENCE 773 0- Journal of Optics Springer India 44/3(2015-09-01), 249-254 0972-8821 44:3<249 2015 44 12596