| 摘要: | 摘要： In this study, the colloidal ternary Zn sub(x) Cd sub(1-x) S (x = 0.5 and 0.8, named as Zn sub(0.8) and Zn sub(0.5)) white quantum dots (WQDs) have been prepared and used to form WQDs-based white light emitting diodes (WLED) with three different encapsulation types (convert, remote and conformal type). Moreover, acyclic-based UV curing polymer was used to incorporate with WQDs. The optical properties of Zn sub(x) WQDs-based WLEDs including Commission Internationale de l'Eclairage (CIE) chromaticity coordinates, correlated color temperature (CCT), color rendering index (CRI) and luminous efficacy can be tuned by controlling the compositions, blending content of Zn sub(x) WQDs and encapsulated methods. The optimum result for Zn sub(0.8) and Zn sub(0.5)-based WLEDs can be observed in the remote type with the CIE, CRI, CCT and luminous efficacy under 20 mA of (0.34, 0.32), 87, 5000 K and 11.93 lm/W and (0.40, 0.37), 86, 3400 K and 2.76 lm/W, respectively. The higher luminous efficacy and stability of WLEDs can be obtained due to use an acyclic-based UV curing polymer, high QY of WQDs and suitable encapsulated method. The results also have exhibited the potential applications of Zn sub(x) WQDs as nanophosphors in WLEDs.
出版日期： 2016-03-01
出處： Optical materials express, 2016-03, Vol.6 (3), p.749-758
資源來源： Optica Publishing Group Journals
識別號： ISSN: 2159-3930
識別號： EISSN: 2159-3930
識別號： DOI: 10.1364/OME.6.000749 |
