Bright and Color-Saturated Emission from Blue Light-Emitting Diodes Based on Solution-Processed Colloidal Nanocrystal Quantum Dots

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• 作者：Zhanao Tan ; Fan Zhang ; Ting Zhu ; Jian Xu ; Andrew Y. Wang ; John D. Dixon ; Linsong Li ; Qi Zhang ; Suzanne E. Mohney ; Jerzy Ruzyllo
• 刊名：Nano Letters
• 出版年：2007
• 出版时间：December 2007
• 年：2007
• 卷：7
• 期：12
• 页码：3803 - 3807
• 全文大小：160K
• 年卷期：v.7,no.12(December 2007)
• ISSN：1530-6992

文摘

We report a multilayer solution-processed blue light-emitting diode based on colloidal core/shell CdS/ZnS nanocrystal quantum dots (QDs).At a low-operating voltage of 5.5 V, the device emits spectrally pure blue radiation at 460 nm with a narrow full-width-at-half-maximum bandwidthof 20 nm and high brightness up to 1600 cd/m². Broad-band, long-wavelength emission from the polymer components and deep traps in theQDs are minimized to less than 5% of the total emission.