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White light emission from amorphous silicon‐oxycarbide materials
Author(s) -
Ishikawa Yukari,
Sato Koji,
Kawasaki Shinji,
Ishii Yosuke,
Matsumura Akihiro,
Muto Shunsuke
Publication year - 2012
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.201100816
Subject(s) - materials science , photoluminescence , silicon , porous silicon , carbon fibers , amorphous silicon , husk , amorphous solid , ultraviolet , mesoporous material , absorption (acoustics) , chemical engineering , optoelectronics , nanotechnology , crystalline silicon , composite material , chemistry , crystallography , composite number , catalysis , organic chemistry , botany , engineering , biology
This paper reports white photoluminescence (PL) from silicon‐oxycarbide materials. These are oxidized mesoporous carbon silica (MPCS) and thermally treated rice husk. The PL intensities were strong enough to be detected by the naked eye in daylight under ultraviolet light excitation at room temperature. We investigated the structure, composition, and bonding state of fabricated silicon‐oxycarbide materials and found the commonality between the oxidized MPCS and the thermally treated rice husk. Both of them (i) were composed of silica and small amount of carbon, (ii) have porous structure and large surface area over 100 m 2 /g, and (iii) have a broad infrared absorption band at around 1100 cm −1 related to the strained silica. The origins of white PL are discussed by taking account of the commonality.