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Study on the Main‐Chain Structure of Amorphous Fluorine Resins for Encapsulating AlGaN‐Based DUV‐LEDs
Author(s) -
Yamada Kiho,
Nagasawa Yosuke,
Nagai Shoko,
Hirano Akira,
Ippommatsu Masamichi,
Aosaki Ko,
Honda Yoshio,
Amano Hiroshi,
Akasaki Isamu
Publication year - 2018
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201700525
Subject(s) - materials science , amorphous solid , fluorine , ultraviolet , oxygen , electrode , irradiation , ring (chemistry) , optoelectronics , photochemistry , chemistry , crystallography , organic chemistry , metallurgy , physics , nuclear physics
The main chain structure of optically isotropic amorphous fluorine resin for encapsulating AlGaN‐based deep‐ultraviolet LEDs ( λ < 300 nm) is studied. One type of amorphous fluorine resin has a five‐membered ring with a single oxygen atom and the other has that one with two oxygen atoms. Reliability testing is performed using AlGaN‐based LEDs of 262 and 289 nm. For the resin with two oxygen atoms in the ring, visible damage to the electrode and significantly increased leakage current are considered to been caused by the photolysis of the ring induced by irradiation with deep‐ultraviolet light. In contrast, electrode damage and increased leakage are not observed in the case of the resin with the single‐oxygen ring.