EFFECTS OF PRESSURE ON THE OPTICAL-ABSORPTION AND PHOTOLUMINESCENCE OF WOHLER SILOXENE

被引：8

作者：

ERNST, S ^{[1
]}

ROSENBAUER, M ^{[1
]}

SCHWARZ, U ^{[1
]}

DEAK, P ^{[1
]}

SYASSEN, K ^{[1
]}

STUTZMANN, M ^{[1
]}

CARDONA, M ^{[1
]}

机构：

[1] TECH UNIV BUDAPEST, H-1521 BUDAPEST, HUNGARY

来源：

PHYSICAL REVIEW B | 1994年 / 49卷 / 08期

关键词：

D O I：

10.1103/PhysRevB.49.5362

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the effect of hydrostatic pressure (P less-than-or-equal-to 5 GPa) oil optical absorption and photoluminescence spectra of Wohler siloxene (Si6O3H6, as prepared) at T = 300 K. The absorption edge energy near 2.75 eV decreases linearly with pressure at a rate of -30+/-3 meV/GPa. For the position of the maximum of the green luminescence band we find a similar pressure coefficient (dE/dP = -24+/-3 meV/GPa). The intensity of the green luminescence shows a reversible decrease with increasing pressure. The pressure dependence of interlayer and intralayer lattice constants has been determined by x-ray powder diffraction. The observed changes in optical transition energies are discussed in the framework of a semiempirical quantum-chemical calculation of the electronic structure of siloxene.

引用

页码：5362 / 5367

页数：6

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