| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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White Light Emission from ZnS:Mn Thin Films Deposited on GaN Substrates by Pulsed Laser Deposition |
| Cai-Feng Wang1,2**, Qing-Shan Li1,3**, Ji-Suo Wang1, Feng-Zhou Zhao 3, Li-Chun Zhang3 |
1College of Physics and Engineering, Qufu Normal University, Qufu 273165
2College of Aeronautical Engineering, Binzhou University, Binzhou 256603
3School of Physics and Optoelectronic Engineering, Ludong University, Yantai 264025
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| Cite this article: |
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Cai-Feng Wang, Qing-Shan Li, Ji-Suo Wang et al 2016 Chin. Phys. Lett. 33 076802 |
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Abstract ZnS:Mn thin films are grown on GaN substrates by pulsed laser deposition. The structure, morphology and optical properties are investigated by x-ray diffraction, scanning electron microscopy and photoluminescence (PL). The obtained ZnS:Mn thin films are grown in preferred orientation along $\beta$-ZnS (111) direction corresponding to crystalline structure of cubic phase. The deposition temperature has an obvious effect on the structure, surface morphology and optical properties of ZnS:Mn thin films. PL measurements show that there are two emission bands located at 440 nm and 595 nm when the films are deposited at temperatures from 100$^{\circ}\!$C to 500$^{\circ}\!$C. The relative integrated intensity of the blue emission and orange-red emission is determined by the deposition conditions. At the proper deposition temperature of 300$^{\circ}\!$C, the color coordinate is closest to (0.33, 0.33). The ZnS:Mn films on GaN substrates can exhibit white light emission.
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Received: 19 April 2016
Published: 01 August 2016
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| PACS: |
68.55.-a
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(Thin film structure and morphology)
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78.55.Et
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(II-VI semiconductors)
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78.67.Pt
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(Multilayers; superlattices; photonic structures; metamaterials)
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