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Optical Properties of ZnS Embedded into Polyvinyl Alcohol Films

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Abstract:

A polyvinyl alcohol (PVA) nanocomposite thin film embedded with zinc sulfide (ZnS) quantum dots was fabricated by a drop-casting method. The ZnS-embedded PVA films were characterized with polarized optical microscopy (POM), ultraviolet-visible (UV-vis) spectroscopy and photoluminescence (PL) spectroscopy. The POM study clearly exhibits the photo-elasticity effects of the ZnS/PVA film when stress is added. Optical absorption spectra showed strong red shift for the ZnS quantum dots in the PVA matrix. Room-temperature PL spectra demonstrated that the pure ZnS quantum dots show cyan emission at 517 nm while ZnS/PVA thin film gives off blue PL with a strong broad peak at 478 nm and a shoulder peak at 536 nm.

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Periodical:

Key Engineering Materials (Volume 538)

Pages:

262-265

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.538.262

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Online since:

January 2013

Authors:

Qing Lan Ma, Rui Xiong, Bao Gai Zhai, Yuan Ming Huang

Keywords:

Nanocomposite Film, Optical Property, Poly(vinyl alcohol), Zinc Sulfide

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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