Temperature Dependent Photoluminescent Investigation of PEDOT:PSS for use in Scintillation Detectors
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Authors
Hucker, Jonathan
Date
2024-04-26
Type
thesis
Language
eng
Keyword
Fluorescence , Light yield , Clevios , Poly(methyl methacrylate) , 1,1,4,4-tetraphenyl-1,3-butadiene
Alternative Title
Abstract
Rare event search detectors are constructed from a variety of materials with differing optical properties. The high sensitivity requirements of these detectors demand a reduced level of background events, including unwanted photoluminescence from detector materials. Photoluminescent properties of the organic conducting polymer poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS, referred to as Clevios) were investigated at a range of temperatures from 300 K down to 4 K. Photoluminescence of poly(methyl methacrylate) (PMMA, commonly referred to as acrylic) and 1,1,4,4-tetraphenyl-1,3-butadiene (TPB) coated acrylic, were studied as reference materials. Transmittance spectral measurements of Clevios indicated a reduction of transmission at ultraviolet wavelengths. Excitation of Clevios at 260 nm produced an emission feature at 350 nm. No significant fluorescence of Clevios was observed at visible wavelengths. Time resolved fluorescent spectroscopy indicated that the fluorescence of Clevios coated acrylic was comparable to that of the bare acrylic substrate. Absorption of excitation light from the Clevios coating and reflections between the Clevios coating and acrylic substrate created minor differences in the measured fluorescence between the samples. The light yield of Clevios coated acrylic was 0.18% that of TPB coated acrylic at 87 K. It is probable that this fluorescence mostly, if not entirely, can entirely be attributed to emission from the acrylic substrate.
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ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.
Attribution 4.0 International