title: High Color-Rendering-index Hybrid White LEDs Employing CdSe/ZnS Core/Shell Quantum Dots.
abstract: Hybrid white LEDs were constructed by leveraging a combination of CdSe/ZnS core/shell QDs and YAG: Ce³⁺ phosphors. The CdSe/ZnS core/shell QDs were synthesized by a two-step process in which CdSe QDs were first prepared via a hot-injection method, followed by ZnS coating through a facile single-molecular precursor approach. The resultant red-emitting CdSe/ZnS QDs showed decent fluorescent quantum yielding (36%). The resultant hybrid white LEDs--that based on CdSe/ZnS QDs and solid-state-reaction-processed YAG: Ce³⁺ phosphors--showed good luminescence properties, including bright warm light, a high color rendering index of 91.3, a low color temperature of 4965 K and a luminous efficiency of 44.22 lm/W. Moreover, increased luminous intensity has been observed in the presence of increased forward current without luminescence saturation, promising an ideal approach to construct warm-white LEDs with excellent color rendering properties.
authors.forename: Yajing
authors.initials: Y
authors.lastname: Chang
authors.forename: Dapeng
authors.initials: D
authors.lastname: Sun
authors.forename: Zhongping
authors.initials: Z
authors.lastname: Zhang
authors.forename: Yugang
authors.initials: Y
authors.lastname: Zhang
authors.forename: Xudong
authors.initials: X
authors.lastname: Yao
authors.forename: Danlu
authors.initials: D
authors.lastname: Jiang
authors.forename: Yalan
authors.initials: Y
authors.lastname: Yu
authors.forename: Longfei
authors.initials: L
authors.lastname: Mi
authors.forename: Lei
authors.initials: L
authors.lastname: Chen
authors.forename: Honghai
authors.initials: H
authors.lastname: Zhong
authors.forename: Yang
authors.initials: Y
authors.lastname: Jiang