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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 5, Iss. 9 — Sep. 10, 2007
  • pp: 546–548

Study of white light emission from ZnS/PS composite system

Caifeng Wang, Qingshan Li, Lei Lu, Lichun Zhang, and Hongxia Qi  »View Author Affiliations


Chinese Optics Letters, Vol. 5, Issue 9, pp. 546-548 (2007)


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Abstract

ZnS films were deposited by pulsed laser deposition (PLD) on porous silicon (PS) substrates formed by electrochemical anodization of p-type (100) silicon wafer. The photoluminescence (PL) spectra of ZnS/PS composites were measured at room temperature. Under different excitation wavelengths, the relative integrated intensities of the red light emission from PS layers and the blue-green emission from ZnS films had different values. After samples were annealed in vacuum at different temperatures (200, 300, and 400 Celsius degree) for 30 min respectively, a new green emission located at around 550 nm appeared in the PL spectra of all ZnS/PS samples, and all of the ZnS/PS composites had a broad PL band (450-700 nm) in the visible region, exhibiting intensively white light emission.

© 2007 Chinese Optics Letters

OCIS Codes
(230.4170) Optical devices : Multilayers
(250.5230) Optoelectronics : Photoluminescence
(310.6860) Thin films : Thin films, optical properties

Citation
Caifeng Wang, Qingshan Li, Lei Lu, Lichun Zhang, and Hongxia Qi, "Study of white light emission from ZnS/PS composite system," Chin. Opt. Lett. 5, 546-548 (2007)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-5-9-546

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