呈现窄带和绿色光致发光的胶体Zn(Te,Se)/ZnS核壳量子点
Colloidal Zn(Te,Se)/ZnS Core/Shell Quantum Dots Exhibiting Narrow-Band and Green Photoluminescence.
作者信息
Asano Hiroshi, Tsukuda Satoshi, Kita Masao, Fujimoto Shinji, Omata Takahisa
机构信息
Division of Material and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai 980-8577, Japan.
出版信息
ACS Omega. 2018 Jun 20;3(6):6703-6709. doi: 10.1021/acsomega.8b00612. eCollection 2018 Jun 30.
Colloidal CdSe quantum dot (QD) phosphors have attracted considerable attention as green and red phosphors for blue backlight downconversion in next-generation liquid-crystal displays because of their excellent emission features including tunable emission wavelength and narrow emission bands. Alternatives to CdSe, which do not contain toxic cadmium, are strongly desired to ensure safety and reduce the environmental load of consumer products. Herein, we synthesized colloidal Zn(Te,Se)/ZnS core/shell QDs and demonstrated narrow-band green photoluminescence (PL) emission. A full width at half-maximum of 30 nm was achieved for PL emission at 535 nm from Zn(TeSe)/ZnS core/shell QDs with a core QD diameter of 4.3 nm. This emission characteristic was as good as that of CdSe QDs.
胶体硒化镉量子点（QD）荧光粉作为下一代液晶显示器中用于蓝光背光源下转换的绿色和红色荧光粉，因其出色的发射特性（包括可调发射波长和窄发射带）而备受关注。为确保安全性并降低消费产品的环境负荷，人们强烈希望找到不含有毒镉的硒化镉替代品。在此，我们合成了胶体Zn(Te,Se)/ZnS核壳量子点，并展示了窄带绿色光致发光（PL）发射。对于直径为4.3 nm的核量子点的Zn(TeSe)/ZnS核壳量子点，在535 nm处的PL发射半高宽达到了30 nm。这种发射特性与硒化镉量子点的特性一样好。
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