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Title: Strong deep-blue photoluminescence of mesographite boron nitride
Authors: Yao, B. 
Shen, Z.X. 
Liu, L. 
Su, W.H.
Issue Date: 31-Mar-2004
Citation: Yao, B., Shen, Z.X., Liu, L., Su, W.H. (2004-03-31). Strong deep-blue photoluminescence of mesographite boron nitride. Journal of Physics Condensed Matter 16 (12) : 2181-2186. ScholarBank@NUS Repository.
Abstract: Amorphous boron nitride (a-BN) powder was prepared by mechanical milling of hexagonal BN. Annealing the a-BN between 600 and 1200°C produced turbostratic BN (t-BN) and mesographite BN (m-BN) with different degrees of three-dimensional order (DTDO). The photoluminescence (PL) of the BN samples was investigated using 325 nm laser excitation. The a-BN and t-BN emit continuums with a maximum near 340 nm. The m-BN samples that have three-dimensional order show deep blue PL bands. The positions of the bands change with lattice constants, while the PL intensity increases firstly with increasing DTDO then decreases after reaching a maximum. The strongest PL band is observed at 413 nm in one of the m-BNs prepared at an annealing temperature of 1100°C. It is suggested that the bands are related to structural defects in the m-BNs.
Source Title: Journal of Physics Condensed Matter
ISSN: 09538984
DOI: 10.1088/0953-8984/16/12/026
Appears in Collections:Staff Publications

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