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White light photoluminescence from ZnS films on porous Si substrates |
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| Authors: | Wang Caifeng Li Qingshan Hu Bo Li Weibing |
| Affiliation: | 1. Department of Physics and Electronic Science, Binzhou University, Binzhou 256603, China 2. School of Physics and Electronic Engineering, Ludong University, Yantai 264025, China 3. Flying College, Binzhou University, Binzhou 256603, China |
| Abstract: | ZnS films were deposited on porous Si (PS) substrates using a pulsed laser deposition (PLD) technique.White light emission is observed in photoluminescence (PL) spectra, and the white light is the combination of blue and green emission from ZnS and red emission from PS. The white PL spectra are broad, intense in a visible band ranging from 450 to 700 nm. The effects of the excitation wavelength, growth temperature of ZnS films, PS porosity and annealing temperature on the PL spectra of ZnS/PS were also investigated. |
| Keywords: | white light emission photoluminescence ZnS films porous Si |
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