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https://doi.org/10.1088/0953-8984/16/12/026
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. https://doi.org/10.1088/0953-8984/16/12/026 | 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 | URI: | http://scholarbank.nus.edu.sg/handle/10635/98039 | ISSN: | 09538984 | DOI: | 10.1088/0953-8984/16/12/026 |
Appears in Collections: | Staff Publications |
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