Radiative recombination processes in Zn1-xMgxSe layers

被引：13

作者：

Firszt, F

机构：

[1] Institute of Physics, N Copernicus University, 87-100 Toruń

来源：

SEMICONDUCTOR SCIENCE AND TECHNOLOGY | 1997年 / 12卷 / 03期

关键词：

D O I：

10.1088/0268-1242/12/3/006

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Luminescence properties of Zn1-xMgxSe layers obtained by thermal diffusion of the isoelectronic substituent Mg into ZnSe single crystals have been studied. Mg easily substitutes Zn during thermal annealing of ZnSe in Mg vapour, forming a Zn1-xMgxSe mixed crystal layer. The samples show a graded bandgap due to different Mg concentrations in the Mg-diffused surface region. At low temperatures the photoluminescence spectra of such Zn1-xMgxSe mixed crystals are dominated by blue-violet emission due to recombination of excitons and shallow donor-acceptor pairs. The influence of Mg diffusion conditions on luminescence properties was investigated and possible mechanisms involved in radiative recombination processes were discussed in terms of exciton and carrier localization due to random potential fluctuations in disordered mixed crystals. In-ZnSe-ZnMgSe-Au electroluminescent structures have been obtained and blue-violet and green electroluminescence in the temperature range from 40 K to room temperature was observed.

引用

页码：272 / 279

页数：8

共 53 条

[1]

CHADI DJ, 1993, PHYS REV LETT, V72, P34

[2] FLUORESCENCE LINE NARROWING, LOCALIZED EXCITON-STATES, AND SPECTRAL DIFFUSION IN THE MIXED SEMICONDUCTOR CDSXSE1-X [J].

COHEN, E ;

STURGE, MD .

PHYSICAL REVIEW B, 1982, 25 (06) :3828-3840

[3]

COOK JW, 1995, LASER FOCUS WORL MAR, P101

[4]

COPPER E, 1988, J CRYST GROWTH, V86, P544

[5] PAIR SPECTRA AND EDGE EMISSION IN ZINC SELENIDE [J].

DEAN, PJ ;

MERZ, JL .

PHYSICAL REVIEW, 1969, 178 (03) :1310-&

[6] BLUE AND GREEN LIGHT-EMITTING DIODE STRUCTURES GROWN BY MOLECULAR-BEAM EPITAXY ON ZNSE SUBSTRATES [J].

EASON, D ;

REN, J ;

YU, Z ;

HUGHES, C ;

COOK, JW ;

SCHETZINA, JF ;

ELMASRY, NA ;

CANTWELL, G ;

HARSH, WC .

JOURNAL OF CRYSTAL GROWTH, 1995, 150 (1-4) :718-724

[7] HIGH-BRIGHTNESS BLUE AND GREEN LIGHT-EMITTING-DIODES [J].

EASON, DB ;

YU, Z ;

HUGHES, WC ;

ROLAND, WH ;

BONEY, C ;

COOK, JW ;

SCHETZINA, JF ;

CANTWELL, G ;

HARSCH, WC .

APPLIED PHYSICS LETTERS, 1995, 66 (02) :115-117

[8]

FERREIRA SO, 1995, SEMICOND SCI TECH, V10, P489, DOI 10.1088/0268-1242/10/4/018

[9]

FERREIRA SO, 1995, APPL PHYS LETT, V66, P1519

[10] COMPOSITION DEPENDENCE OF PHOTOLUMINESCENCE SPECTRA IN ZN1-XMGXSE MIXED-CRYSTALS [J].

FIRSZT, F ;

LEGOWSKI, S ;

MECZYNSKA, H ;

SZATKOWSKI, J ;

PASZKOWICZ, W ;

SPOLNIK, ZM .

ACTA PHYSICA POLONICA A, 1995, 88 (04) :711-714

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