Dependence of the Peak Energy of the Pair-Photoluminescence Band on Excitation Intensity
Dependence of the Peak Energy of the Pair-Photoluminescence Band on Excitation Intensity
复制标题
光致发光对的峰值能量对激发强度的依赖性
DOI：
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发表时间：
1972
期刊：
影响因子：
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通讯作者：
A. Halperin
中科院分区：
文献类型：
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作者：
E. Zacks;A. Halperin
An analytical expression is derived for the dependence of the peak energy of the broad-band pair-recombination emission on the excitation intensity. Experimental values given in the literature were fitted by a nonlinear-least-square computer program to the theoretical expression. The fit gave values for the limiting photon energy for distant pairs ($h{\ensuremath{\nu}}_{\ensuremath{\infty}}$) and for the Bohr radius (${R}_{B}$) for the shallow hydrogenic impurity in the crystal. Values obtained for GaP were $h{\ensuremath{\nu}}_{\ensuremath{\infty}}=2.189$ eV and ${R}_{B}=24.2$ \AA{} (averages from two sets of experimental results). For ZnSe we obtained $h{\ensuremath{\nu}}_{\ensuremath{\infty}}=2.691$ eV and ${R}_{B}=28.1$ \AA{}. The present method is specifically useful in crystals in which the discrete-line pair emission is not observable. It can, however, also help as a guide and a check in the classification of the discrete lines according to their shell number.
An analytical expression is derived for the dependence of the peak energy of the broad-band pair-recombination emission on the excitation intensity. Experimental values given in the literature were fitted by a nonlinear-least-square computer program to the theoretical expression. The fit gave values for the limiting photon energy for distant pairs ($h{\ensuremath{\nu}}_{\ensuremath{\infty}}$) and for the Bohr radius (${R}_{B}$) for the shallow hydrogenic impurity in the crystal. Values obtained for GaP were $h{\ensuremath{\nu}}_{\ensuremath{\infty}}=2.189$ eV and ${R}_{B}=24.2$ \AA{} (averages from two sets of experimental results). For ZnSe we obtained $h{\ensuremath{\nu}}_{\ensuremath{\infty}}=2.691$ eV and ${R}_{B}=28.1$ \AA{}. The present method is specifically useful in crystals in which the discrete-line pair emission is not observable. It can, however, also help as a guide and a check in the classification of the discrete lines according to their shell number.