Open AccessEnhancement of the luminescent and optical properties of ceramic Ce:GAGG after surface treatment with phosphoric acid
Author(s) -
Chansun Park,
Sangsu Kim,
Wonhi Lee,
Chanho Kim,
Shinhaeng Cho,
Jung Yeol Yeom
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.414620
Subject(s) - materials science , polishing , ceramic , phosphoric acid , photomultiplier , optics , luminescence , scintillator , anhydrous , phosphor , surface roughness , tantalate , analytical chemistry (journal) , optoelectronics , composite material , ferroelectricity , detector , chemistry , physics , organic chemistry , chromatography , dielectric , metallurgy
Surface modification of ceramic Ce-doped Gd 3 Al 2 Ga 3 O 12 (Ce:GAGG) was performed by exposing small samples to anhydrous phosphoric acid (H 3 PO 4 ) under different conditions (temperature and duration) to investigate the effects of chemical polishing treatment. When coupled to a photomultiplier tube (PMT) and used as a radiation detector, chemical treatment for 3 min at 190 °C improved the light (signal) output by 24.8% and energy resolution by 2.5% (percentage point), respectively. This can be attributed to a reduction in surface roughness that enhanced optical properties. Thus, chemical polishing could be a low-cost alternative to mechanical polishing especially for small or complex shaped ceramic scintillators.