Blue photoluminescence of highly photoexcited rutile TiO_2: Nearly degenerate conduction-band effects

Yasuhiro Yamada; rnYoshihiko Kanemitsu

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Blue photoluminescence of highly photoexcited rutile TiO_2: Nearly degenerate conduction-band effects

机译：高光激发金红石型TiO_2的蓝色光致发光：几乎简并的导带效应

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We report the observation of blue photoluminescence (PL) from highly photoexcited rutile TiO_2 single crystals at room temperature. Under extremely high-density excitation, we found an anomalous dependence of the PL dynamics and intensity on the excitation density. By considering the nearly degenerate conduction bands of rutile, we revealed that the PL behavior is determined by the electron density in the lower-energy conduction band. The PL decay dynamics is well explained by the simple model involving two-body radiative recombination and three-body Auger recombination processes. We discuss the origin of the blue PL band.

机译：我们报告了在室温下从高光激发金红石型TiO_2单晶中观察到的蓝色光致发光（PL）。在极高密度的激发下，我们发现PL动力学和强度对激发密度的反常依赖。通过考虑金红石的几乎简并的导带，我们发现PL行为由较低能导带中的电子密度决定。 PL衰减动力学可以通过涉及两体辐射复合和三体俄歇复合过程的简单模型很好地解释。我们讨论蓝色PL波段的起源。

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《Physical review》 |2010年第11期|p.113103.1-113103.4|共4页
作者
Yasuhiro Yamada; rnYoshihiko Kanemitsu;
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作者单位

Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan;

rnInstitute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan Photonics and Electronics Science and Engineering Center, Kyoto University, Kyoto 615-8510, Japan;

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正文语种 eng
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photoluminescence, properties and materials; charge carriers: generation, recombination, lifetime, and trapping;

机译：光致发光;性质和材料;电荷载体：产生;重组;寿命和捕获;

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2. Photoluminescence study of anatase and rutile structures of Fe-doped TiO_2 nanoparticles at different dopant concentrations [J] . Applied Physics . 2020,第3期

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3. Temperature dependent photoluminescence of anatase and rutile TiO_2 single crystals: Polaron and self-trapped exciton formation [J] . Gallart Mathieu, Cottineau Thomas, Honerlage Bernd, Journal of Applied Physics . 2018,第13期

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4. Highly Active Rutile TiO_2 for Photocatalysis [C] . Junping Yan, Zilong Tang, Zhongtai Zhang, Rare Metal Materials and Engineering vol.35 Suppl.1 February 2006: Technology and Applications of Chemical Sensors . 2005

机译：用于光催化的高活性金红石型TiO_2
5. Highly degenerate harmonic mean curvature flow. [D] . Caputo, Maria Cristina. 2006

机译：高度简并的谐波平均曲率流。
6. Photoluminescence: Local Versus Long‐Range Diffusion Effects of Photoexcited States on Radiative Recombination in Organic–Inorganic Lead Halide Perovskites (Adv. Sci. 9/2015) [O] . Milan Vrućinić, Clemens Matthiesen, Aditya Sadhanala, 2015

机译：光致发光：光激发态对有机-无机卤化铅钙钛矿中辐射复合的局部对远方扩散效应（Adv。Sci。9/2015）
7. Blue photoluminescence of highly photoexcited rutile TiO_{2}: Nearly degenerate conduction-band effects [O] . Yamada Yasuhiro, Kanemitsu Yoshihiko 2010

机译：高光激发金红石型TiO_ {2}的蓝色光致发光：几乎简并的导带效应

Blue photoluminescence of highly photoexcited rutile TiO_2: Nearly degenerate conduction-band effects

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