LOCALIZATION AND RELAXATION OF EXCITONS IN CDZNS/ZNS STRAINED-LAYER SUPERLATTICES STUDIED BY PHOTOLUMINESCENCE EXCITATION AND PHOTOCURRENT SPECTROSCOPIES

被引：4

作者：

TAGUCHI, T ^{[1
]}

OHNO, T ^{[1
]}

NOZUE, Y ^{[1
]}

机构：

[1] TOHOKU UNIV,DEPT PHYS,SENDAI,MIYAGI 980,JAPAN

来源：

SURFACE SCIENCE | 1992年 / 267卷 / 1-3期

关键词：

D O I：

10.1016/0039-6028(92)91108-N

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A multiple LO-phonon emission process related to the relaxation of excitons of CdxZn1-xS/ZnS strained-layer superlattices (x = 0.3), has been observed in the photoluminescence excitation spectra. The localization of excitons has been found to be the dominant cause of the linewidth broadening. In electric field dependent photocurrent spectra, a significant blueshift of the peak energy and photocurrent enhancement take place with increasing applied field. These results may be fully explained by assuming that this strained superlattice system exhibits a type II band lineup.

引用

页码：141 / 144

页数：4

共 7 条

[1]

AVEN M, 1967, PHYSICS CHEM 2 6 COM, P344

[2]

ENDOH Y, 1990, MATER RES SOC SYMP P, V161, P211

[3] CALCULATION OF THE BAND-GAP FOR SMALL CDS AND ZNS CRYSTALLITES [J].

LIPPENS, PE ;

LANNOO, M .

PHYSICAL REVIEW B, 1989, 39 (15) :10935-10942

[4] EFFECT OF AN ELECTRIC-FIELD ON THE LUMINESCENCE OF GAAS QUANTUM WELLS [J].

MENDEZ, EE ;

BASTARD, G ;

CHANG, LL ;

ESAKI, L ;

MORKOC, H ;

FISCHER, R .

PHYSICAL REVIEW B, 1982, 26 (12) :7101-7104

[5] PROPERTIES OF THE EXCITONIC EMISSION AT ROOM-TEMPERATURE IN CD0.3ZN0.7S/ZNS STRAINED-LAYER SUPERLATTICES [J].

TAGUCHI, T ;

ENDOH, Y .

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS, 1991, 30 (6A) :L952-L955

[6]

TAGUCHI T, 1990, 20TH INTERNATIONAL CONFERENCE ON THE PHYSICS OF SEMICONDUCTORS, VOLS 1-3, P1158

[7]

ULBRICH R, 1971, PHYS REV LETT, V27, P512

← 1 →