Light emission from SrTiO3

Light emission from SrTiO3
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SrTiO3 的发光

DOI:
10.1002/pssb.201000643
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发表时间:
2011
期刊:
physica status solidi (b)
影响因子:
--
通讯作者:
Y. Yamada
Y. Yamada
中科院分区:
--
文献类型:
--
作者:
Y. Kanemitsu;Y. Yamada

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综述了我们近年来对钙钛矿型半导体SrTiO_3晶体的光学研究。利用光致发光(PL)和瞬态吸收(TA)光谱研究了未掺杂、电子掺杂和空位掺杂SrTiO 3晶体的光生载流子复合动力学。通过高密度光激发和电子掺杂,在室温下在SrTiO 3晶体中观察到清晰的蓝色PL。光致发光谱和动力学对光激发载流子密度和化学掺杂电子密度敏感。高密度激发下的PL和TA衰减动力学由非辐射俄歇复合确定。结果表明,PL寿命可以作为一个探针,用于确定载流子和缺陷的空间分布在SrTiO 3。
We summarized our recent optical studies on perovskite semiconductor SrTiO3 crystals. Photocarrier recombination dynamics of undoped, electron‐doped, and vacancy‐doped SrTiO3 crystals were studied by photoluminescence (PL) and transient absorption (TA) spectroscopy. By high‐density photoexcitation and electron doping, the blue PL is clearly observed in SrTiO3 crystals at room temperature. The PL spectrum and dynamics are sensitive to the photoexcited carrier density and the chemically doped electron density. The PL and TA decay dynamics under high‐density excitation are determined by nonradiative Auger recombination. It is demonstrated that the PL lifetime can be used as a probe for determining spatial profiles of carriers and defects in SrTiO3.
DOI: 10.1038/nmat1498
发表时间: 2005-11-01
期刊: NATURE MATERIALS
影响因子: 41.2
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