DEEP EUROPIUM-BOUND EXCITON IN A ZNS LATTICE

被引：51

作者：

SWIATEK, K ^{[1
]}

GODLEWSKI, M ^{[1
]}

HOMMEL, D ^{[1
]}

机构：

[1] ACAD SCI GDR, ZENT INST ELEKTR PHYS, O-1086 BERLIN, GERMANY

来源：

PHYSICAL REVIEW B | 1990年 / 42卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.42.3628

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Eu-related recombination processes in ZnS are discussed on the basis of electron-spin-resonance (ESR) and optical studies. The absence of any Eu2+ and/or Eu3+ intra-ion emissions is explained as a consequence of the midgap position of Eu2+ in ZnS. A new Eu-related infrared emission is observed and attributed to a bound-exciton (BE) recombination. In the Eu-bound exciton the hole is strongly localized on the 4f shell of Eu, whereas the electron is either delocalized on the 12 nearest-neighbor Zn-cation sites (for isolated Eu) or trapped at a compensating ion (for Eu complexes). The BE dissociation energy is determined to be about 10 meV. © 1990 The American Physical Society.

引用

页码：3628 / 3633

页数：6

共 24 条

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