Colloidal Zn(Te,Se)/ZnS Core/Shell Quantum Dots Exhibiting Narrow-Band and Green Photoluminescence

Hiroshi Asano; Satoshi Tsukuda; Masao Kita; Shinji Fujimoto; Takahisa Omata

doi:10.1021/acsomega.8b00612

Colloidal Zn(Te,Se)/ZnS Core/Shell Quantum Dots Exhibiting Narrow-Band and Green Photoluminescence

ACS Omega. 2018 Jun 20;3(6):6703-6709. doi: 10.1021/acsomega.8b00612. eCollection 2018 Jun 30.

Authors

Hiroshi Asano¹, Satoshi Tsukuda², Masao Kita³, Shinji Fujimoto¹, Takahisa Omata^{1

2}

Affiliations

¹ Division of Material and Manufacturing Science, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
² Institute of Multidisciplinary Research for Advanced Materials (IMRAM), Tohoku University, 2-1-1 Katahira Aoba-ku, Sendai 980-8577, Japan.
³ Department of Mechanical Engineering, National College of Technology, Toyama College, 13 Hongo-machi, Toyama 939-8630, Japan.

Abstract

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(Te_0.77Se_0.23)/ZnS core/shell QDs with a core QD diameter of 4.3 nm. This emission characteristic was as good as that of CdSe QDs.