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首页> 外文期刊>Physica, B. Condensed Matter >The influence of nickel concentration on photoluminescence spectra of ZnSe:Ni samples
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The influence of nickel concentration on photoluminescence spectra of ZnSe:Ni samples

机译:镍浓度对ZnSe:Ni样品的光致发光光谱的影响

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摘要

Photoluminescence (PL) spectra of ZnSe samples grown by iodine transport method and doped with Ni during the growth process and grown from the melt and doped with Ni by diffusion from a gas phase are investigated in visible and infrared (IR) ranges at 77 and 300 K. It is shown that under sub-band excitation, the PL spectra for the undoped samples of both types are similar and may be attributed to self-activated luminescence with participation of iodine- and V_(Zn)-based centres. The PL study for ZnSe samples doped with Ni carried out at various Ni concentrations, temperatures, and excitation intensities gives reason to ascribe the observed bands in near-IR and IR ranges to ~3T_2(F)→~3T_1(F) and ~3T_1(P)→~3T_1(F) intracentre transitions within the Ni_(Zn)~2(d~8) ion.
机译:在可见光和红外(IR)范围内研究了通过碘传输方法生长并在生长过程中掺杂有Ni的ZnSe样品的光致发光(PL)光谱,该样​​品在熔融过程中生长并从熔体生长并通过气相扩散掺杂了Ni。 K.表明在子带激发下,两种类型的未掺杂样品的PL光谱相似,并且可以归因于基于碘和基于V_(Zn)的中心的自激活发光。在不同的Ni浓度,温度和激发强度下进行的掺杂Ni的ZnSe样品的PL研究给出了将近红外波段和〜3T_2(F)→〜3T_1(F)和〜3T_1的近红外波段观察到的能带归因的原因Ni_(Zn)〜2(d〜8)离子内的(P)→〜3T_1(F)中心跃迁。

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