Spin coating of TPB film on acrylic substrate and measurement of its wavelength shifting efficiency  

作　　者：Hang Yang Zi-Feng Xu Jian Tang Yi Zhang 

机构地区：[1]School of Physics,Sun Yat-sen University,Guangzhou 510275,China [2]School of Chemistry,Sun Yat-sen University,Guangzhou 510275,China

出　　处：《Nuclear Science and Techniques》2020年第3期57-65,共9页核技术（英文）

基　　金：supported in part by the Guangdong Basic and Applied Basic Research Foundation(No.2019A1515012216);the National Natural Science Foundation of China(No.11505301);the Innovation Training Program for bachelor students at the School of Physics in SYSU

摘　　要：Scintillation light from a liquid noble gas during a neutrino or dark matter experiment lies typically within the vacuum ultraviolet region and might be strongly absorbed by surrounding materials such as light guides or photomultipliers.Tetraphenyl butadiene(TPB)is a fluorescent material,acts as a wavelength shifter,and can turn UV light into visible light at a peak wavelength of approximately 425 nm,enabling the light signals to be easily detected during physics studies.Compared with a traditional TPB coating method using vapor deposition,we propose an alternative technique applying a spin-coating procedure to facilitate the development of neutrino and dark matter detectors.This article introduces a method to fabricate a TPB film on an acrylic substrate by using a spincoating method,reports the measurements of the sample film thickness and roughness,demonstrates the reemission spectrum,and quantifies the wavelength shifting efficiency.Scintillation light from a liquid noble gas during a neutrino or dark matter experiment lies typically within the vacuum ultraviolet region and might be strongly absorbed by surrounding materials such as light guides or photomultipliers. Tetraphenyl butadiene(TPB) is a fluorescent material, acts as a wavelength shifter, and can turn UV light into visible light at a peak wavelength of approximately 425 nm, enabling the light signals to be easily detected during physics studies. Compared with a traditional TPB coating method using vapor deposition, we propose an alternative technique applying a spin-coating procedure to facilitate the development of neutrino and dark matter detectors. This article introduces a method to fabricate a TPB film on an acrylic substrate by using a spincoating method, reports the measurements of the samplefilm thickness and roughness, demonstrates the reemission spectrum, and quantifies the wavelength shifting efficiency.

关 键 词：Wavelength shifter Tetraphenyl butadiene Spin-coating method 

分 类 号：TL81[核科学技术—核技术及应用] TB306[一般工业技术—材料科学与工程]