Hybrid remote quantum dot/powder phosphor designs for display backlights  

作　　者：Sofie Abe Jonas J Joos Lisa IDJ Martin Zeger Hens Philippe F Smet 

机构地区：[1]Department of Inorganic and Physical Chemistry,Ghent University,Gent,Belgium [2]Department of Solid State Sciences,LumiLab,Ghent University,Gent,Belgium [3]Center for Nano and Biophotonics,Ghent University,Gent,Belgium

出　　处：《Light(Science & Applications)》2016年第1期11-19,共9页光（科学与应用)（英文版）

基　　金：the IWT-Vlaanderen(Agency for Innovation by Science and Technology in Flanders)for a scholarship(111597 and 121024);support by the European Commission via the Marie-Sklodowska Curie action Phonsi(H2020-MSCA-ITN-642656);the Belgian Science Policy office(IAP 7.35,photon-ics@be);Ghent University(GOA 01G01513);the IWT-Vlaanderen for the SBO-IWT grant LumiCoR(SBO130030).

摘　　要：Quantum dots are ideally suited for color conversion in light emitting diodes owing to their spectral tunability,high conversion efficiency and narrow emission bands.These properties are particularly important for display backlights;the highly saturated colors generated by quantum dots justify their higher production cost.Here,we demonstrate the benefits of a hybrid remote phosphor approach that combines a green-emitting europium-doped phosphor with red-emitting CdSe/CdS core/shell quantum dots.Different stacking geometries,including mixed and separate layers of both materials,are studied at the macroscopic and microscopic levels to identify the configuration that achieves maximum device efficiency while minimizing material usage.The influence of reabsorption,optical outcoupling and refractive index-matching between the layers is evaluated in detail with respect to device efficiency and cost.From the findings of this study,general guidelines are derived to optimize both the cost and efficiency of CdSe/CdS and other(potentially cadmium-free)quantum dot systems.When reabsorption of the green and/or red emission is significant compared to the absorption strength for the blue emission of the pumping light emitting diode,the hybrid remote phosphor approach becomes beneficial.

关 键 词：COST-EFFICIENCY LANTHANIDE light emitting diode nanocrystal remote phosphor 

分 类 号：TN3[电子电信—物理电子学]