Enhanced room temperature exciton photoluminescence of plasma hydrogenated ZnO nanocolumns

Development of Materials Science in Research and Education

Remes, Z.^1 ; Chang, Y.Y.^1^2 ; Stuchlik, J.^1 ; Neykova, N.^1 ; Soucek, J.^2 ; Hsu, Hua Shu^3

Institute of Physics, Czech Academy of Sciences, Cukrovarnicka 10, Praha 6

16200, Czech Republic^1

Faculty of Biomedical Engineering CTU, Nam. Sitna 3105, Kladno

27201, Czech Republic^2

National Pingtung University, Minsheng Rd. 4-18, Pingtung City

900, Taiwan^3

关键词: Electrical conductivity;    Exciton photoluminescences;    High thermal conductivity;    Hydrogen plasma treatments;    Optical transparency;    Plasma hydrogenated;    Ultraviolet photoluminescence;    Zinc oxide (ZnO);   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/465/1/012008/pdf
DOI  :  10.1088/1757-899X/465/1/012008

来源: IOP

【 摘 要 】

Zinc oxide (ZnO) nanocolumns have interesting material properties such as the direct band gap, tunable electrical conductivity, high optical transparency, high thermal conductivity, and large surface to volume ratio. Here we present the latest results on the enhancement of the infrared optical absorptance and ultraviolet photoluminescence in ZnO nanocolumns after hydrogen plasma treatment. The photoluminescence in near UV region at 378 nm has been significantly enhanced by hydrogen plasma treatment at roo temperature whereas the defect related yellow photoluminescence (broad band 550-650 nm) decreased.