Photoluminescence properties of the entire excitonic series in Cu2O

被引：38

作者：

Takahata, Mitsuyoshi ^{[1
]}

Naka, Nobuko ^{[1
]}

机构：

[1] Kyoto Univ, Dept Phys, Sakyo Ku, Kitashirakawa Oiwake Cho, Kyoto 6068502, Japan

来源：

PHYSICAL REVIEW B | 2018年 / 98卷 / 19期

关键词：

RAMAN-SCATTERING; CUPROUS-OXIDE; ABSORPTION; RECOMBINATION; LUMINESCENCE; EXCITATION; DYNAMICS; DECAY;

D O I：

10.1103/PhysRevB.98.195205

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We investigated the photoluminescence spectra of Cu2O under photoexcitation at 3.05 eV across the violet band gap. The following three features were found: photoluminescence from blue and violet excitons; photoluminescence from yellow excitons of s, d, and f states in addition to p states with a quantum number up to ten; and emissions associated with the inelastic collision of the is yellow excitons. The first process is relevant for the separation of radiative and nonradiative decay rates. The second process likely indicates radiative enhancement of high Rydberg yellow excitons. The last process verifies up-conversion of 1s yellow paraexcitons into higher Rydberg states, which is a critical factor impeding the realization of a high-density paraexciton gas towards transition to the Bose-Einstein condensation.

引用

页数：10

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