White light emission from InGaN CdSe/CdS/ZnS Quantum Dots LEDs
II-VI family semiconductor nanocrystals have attracted most interests in nanometer science and technology recently. The quantum dots have many applications in optoelectronic device such as LEDs for its superior properties resulting from the three-dimensional confinement effect of its carrier. Hybrid inorganic/organic electroluminescent devices were demonstrated using monolayers of CdSe/ZnS core/shell QDs sandviched between two organic thin films. However, the luminous efficiency of the hybrid in organic/organic device was very low. In this paper, an intermediate shell of CdS was used as the lattice parameter adaptation layer to improve the core/shell interface quality the luminous efficiency of the core/shell QDs. White light-emitting diodes (WLEDs) were fabricated by combining blue InGaN chips with luminescent colloidal core/shell CdSe/CdS/ZnS quantum dots (QDs). Photoluminescence of CdSe/CdS/ZnS quantum dots demonstrated high photoluminescence efficiency with a quantum yield more than 44％, and size-tunable emission wavelengths from 380 to 620nm. WLED was successfully assembled by blue InGaN chip plus green and red emitting CdSe/CdS/ZnS QDs. The InGaN chip white-light-emitting diodes with CdSe/CdS/ZnS quantum dots as the emitting layer are potentially useful in illumination and display applications.
Quantum Dots White light-emitting diodes
Shen Changyu Yang Yi Jin Shangzhong Ming Jiangzhou
College of Optical and Electronic Technology,China Jiliang University,Hangzhou,Zhejiang,CHN,310018;S College of Optical and Electronic Technology,China Jiliang University,Hangzhou,Zhejiang,CHN,310018 HangZhou DaMing fluorescent material CO.,LTD.,HangZhou,Zhejiang,CHN,311200
国际会议
2008亚太光通信会议(Asia-Pacific Optical Communications 2008)
杭州
英文
2008-10-26（万方平台首次上网日期，不代表论文的发表时间）