High Color-Rendering-Index Hybrid White LEDs Employing CdSe/ZnS Core/Shell Quantum Dots

作者：Chang, Yajing; Sun, Dapeng; Zhang, Zhongping^*; Zhang, Yugang; Yao, Xudong; Jiang, Danlu; Yu, Yalan; Mi, Longfei; Chen, Lei; Zhong, Honghai; Jiang, Yang^*

来源：Journal of Nanoscience and Nanotechnology, 2016, 16(1): 670-676.

DOI：10.1166/jnn.2016.10600

• Hybrid White LEDs
• CdSe/ZnS Core/Shell QDs
• Quantum Yield
• Color Rendering

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 km/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.

• 出版日期2016-1
• 单位合肥工业大学; 巢湖学院