Determination of the optical band-gap energy of cubic and hexagonal boron nitride using luminescence excitation spectroscopy

被引：120

作者：

Evans, D. A.

McGlynn, A. G. ^{[1
]}

Towlson, B. M. ^{[2
]}

Gunn, M. ^{[1
]}

Jones, D. ^{[1
]}

Jenkins, T. E. ^{[1
]}

Winter, R. ^{[1
]}

Poolton, N. R. J. ^{[3
]}

机构：

[1] Aberystwyth Univ, Inst Math & Phys Sci, Aberystwyth SY23 3BZ, Dyfed, Wales

[2] Univ Manchester, Sch Elect Engn & Elect, Manchester M60 1QD, Lancs, England

[3] Synchroton Radiat Dept, STFC Daresbury Lab, Warrington WA4 4AD, Cheshire, England

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 2008年 / 20卷 / 07期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1088/0953-8984/20/7/075233

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Using synchrotron-based luminescence excitation spectroscopy in the energy range 4-20 eV at 8 K, the indirect Gamma-X optical band-gap transition in cubic boron nitride is determined as 6.36 +/- 0.03 eV, and the quasi-direct band-gap energy of hexagonal boron nitride is determined as 5.96 +/- 0.04 eV. The composition and structure of the materials are self-consistently established by optically detected x-ray absorption spectroscopy, and both x-ray diffraction and Raman measurements on the same samples give independent confirmation of their chemical and structural purity: together, the results are therefore considered as providing definitive measurements of the optical band-gap energies of the two materials.

引用

页数：7

共 36 条

[1] Resonant soft-x-ray emission study in relation to the band structure of cBN [J].