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Zhanao Tan, Yu Zhang, Chuang Xie, Huaipeng Su, Jie Liu, Chunfeng Zhang, Nicholas Dellas, Suzanne E. Mohney, Yongqiang Wang, Jingkang Wang and Jian Xu Near-Band-Edge Electroluminescence from Heavy-Metal-Free Colloidal Quantum Dots Advanced Materials 23

Version of Record online: 6 JUL 2011 | DOI: 10.1002/adma.201100719

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The first observation of near-band-edge electroluminescent emission from the colloidal quantum dots (QDs) consisting of CuInS2-ZnS alloyed (ZCIS) cores and ZnSe/ZnS double shells is reported. Bright and organic-free electroluminescence (EL) emission peaked at red (λ = 623 nm), yellow (λ = 594 nm), and green (λ = 560 nm) wavelengths is observed from the heavy-metal-free QD light-emitting diodes (QD-LEDs). The onset voltages, luminance output uniformity, and efficiencies of the heavy-metal-free QD-LEDs are characterized.

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