Near-Band-Edge Electroluminescence from Heavy-Metal-Free Colloidal Quantum Dots

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), a...

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Veröffentlicht in:	Advanced materials (Weinheim) 2011-08, Vol.23 (31), p.3553-3558
Hauptverfasser:	Tan, Zhanao, Zhang, Yu, Xie, Chuang, Su, Huaipeng, Liu, Jie, Zhang, Chunfeng, Dellas, Nicholas, Mohney, Suzanne E., Wang, Yongqiang, Wang, Jingkang, Xu, Jian
Format:	Artikel
Sprache:	eng
Schlagworte:	Colloids - chemistry electroluminescence light-emitting diodes Metals, Heavy - chemistry Quantum Dots Selenium Compounds - chemistry Semiconductors Solvents - chemistry Spectrometry, Fluorescence Sulfides - chemistry Temperature Zinc Compounds - chemistry
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Zusammenfassung:	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.
ISSN:	0935-9648 1521-4095
DOI:	10.1002/adma.201100719