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Temperature Dependence of Photoluminescence Spectra in Polystyrene

Tsagli , Kelvin Xorla
http://rave.ohiolink.edu/etdc/view?acc_num=akron1625744248503334

Abstract Details

2021, Master of Science, University of Akron, Physics.
A previous study of low temperature photoluminescence (PL) in several common polymers revealed that photoluminescence intensity was, to a different degree, temperature dependent in all of them. Even though polystyrene showed only moderate temperature dependence, it was the only studied polymer in which the wavelength, and therefore, the energy of the photoluminescence peak changed with temperature. In this work I explored that effect in more details. A careful photoluminescence study was done of four polystyrene samples from different manufacturers. Samples were labeled PS1, PS2, PS3, and PS4, with measurements done at 77 K, 100 K, 200 K and 292 K. All samples showed that fluorescence quantum yield increased at cryogenic temperatures, causing the peak intensity to increase at temperatures below room temperature. However, only PS4 sample showed a peak shift, i.e. the energy of the peak changed with temperature. In PS1, PS2 and PS3 samples the peak position did not change with temperature. Therefore, I concluded that the effect was not an intrinsic property of polystyrene. Moreover, the data analysis revealed that the shift of the peak in PS4 was caused by a second photoluminescence peak, which displays a very strong temperature dependence. This second peak was not observed in PS1, PS2 and P3 and therefore is not intrinsic to polystyrene. I speculate that it is due to impurities.
Sasa Dordevic (Advisor)
Robert Mallik (Committee Chair)
Ben Hu (Committee Member)
86 p.
Materials Science; Physics
Polystyrene, Photoluminescence Spectroscopy, Low-Temperature Spectroscopy

Recommended Citations

Citations

  • Tsagli , K. X. (2021). Temperature Dependence of Photoluminescence Spectra in Polystyrene [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1625744248503334

    APA Style (7th edition)

  • Tsagli , Kelvin . Temperature Dependence of Photoluminescence Spectra in Polystyrene. 2021. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1625744248503334.

    MLA Style (8th edition)

  • Tsagli , Kelvin . "Temperature Dependence of Photoluminescence Spectra in Polystyrene." Master's thesis, University of Akron, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=akron1625744248503334

    Chicago Manual of Style (17th edition)

akron1625744248503334
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This open access ETD is published by University of Akron and OhioLINK.
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