Carrier recombination in SrTiO3 single crystals: impacts of crystal faces and Nb doping
Carrier recombination in SrTiO3 single crystals: impacts of crystal faces and Nb doping
复制标题
SrTiO3 单晶中的载流子复合:晶面和 Nb 掺杂的影响
DOI:
10.1088/1361-6463/ac073e
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Yoshihito Ichikawa
中科院分区:
文献类型:
--
作者:
Masashi Kato;Takaya Ozawa;Yoshihito Ichikawa
We observed the carrier recombination in SrTiO 3 single crystals with several crystal faces and Nd doping concentrations using time-resolved photoluminescence and microwave photoconductivity decay methods. The shapes of the decay curves were independent of the excited carrier concentrations, and thus the carriers recombined through the Shockley–Read–Hall and surface recombination processes. From the measurements for different crystal faces, we found that, although the surface recombination is significant for the (100),(110), and (111) faces, they have similar surface recombination velocities of∼ 10 6 cm s− 1. Therefore, as photocatalysts, the shape of the materials has a minor effect on the energy conversion efficiency. Based on the dependence of the Nb doping concentration, a high doping concentration significantly enhances the carrier recombination, whereas a moderate Nb doping induces only a slight reduction in the time constants of the carrier decay. In addition, the time constant increases with temperature, and thus moderate Nb doping will have a positive effect on the energy conversion efficiency of SrTiO 3 photocatalysts at high temperatures.
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影响因子:
4.6
作者:
Rodenbücher C;Luysberg M;Schwedt A;Havel V;Gunkel F;Mayer J;Waser R
通讯作者:
Waser R
DOI:
10.1002/pssb.201000643
发表时间:
2011
期刊:
physica status solidi (b)
影响因子:
--
作者:
Y. Kanemitsu;Y. Yamada
通讯作者:
Y. Yamada
DOI:
10.3791/59007
发表时间:
2019
期刊:
Journal of visualized experiments : JoVE
影响因子:
--
作者:
Takatoshi Asada;Yoshihito Ichikawa;M. Kato
通讯作者:
M. Kato
影响因子:
1.5
作者:
M. Kato;K. Miyake;T. Yasuda;M. Ichimura;T. Hatayama;T. Ohshima
通讯作者:
T. Ohshima
影响因子:
3.7
作者:
M. Takizawa;K. Maekawa;H. Wadati;T. Yoshida;A. Fujimori;H. Kumigashira;M. Oshima
通讯作者:
M. Takizawa;K. Maekawa;H. Wadati;T. Yoshida;A. Fujimori;H. Kumigashira;M. Oshima