It was found that greater-than-band gap photon energies cause desorption which is linearly proportional to the incident photon intensity, whereas smaller-than-band gap photon energies cause no desorption. The dependence of carbon dioxide photodesorption on net illumination time was also investigated ...
Band-gap energies and structural properties of doped Ba 0.5 Sr 0.5 Ti O 3 thin films Abstract We have investigated the effect of Ti and Mgdopants on the structural properties and band-gap energies of Ba 0.5 Sr 0.5 Ti O 3 (BST) thin filmsgro... YB Zheng,SJ Wang,ACH Huan,... - 《...
The stable interfaces in the SrTiO 3 -GaP heterojunction is the SrO-P interface of SrTiO 3 (001)||GaP(001) and SrTiO 3 [110]||GaP[100]. Key words: Density functional calculations, Heterojunction, Band Structure, Density of States 文档格式:PDF | 页数:77 | 浏览次数:8 | 上传日期:2017...
(保密的学位论文在解密后应遵守此规定)签名:导师签名:日期:年月日摘要I摘要本文采用基于密度泛函理论的第一性原理赝势平面波方法,研究了铁电晶体SrTiO3分别与化合物半导体GaAs和GaP构成的异质结构的电子特性。首先,分析了钛酸锶、砷化镓和磷化镓三种材料的结构和电子特性。解释了SrTiO3晶体的Ti-O键和Sr-O键的价键...
The achievement of successful growth of SrTiO3 (band gap Eg=3.3 eV) on Si (Eg=1.1 eV) [5], [6], [7], [8], [9] indicates that the growth of Si/SrTiO3 SQWs is feasible nowadays, but not performed yet. Concerning Si/SrTiO3 interfaces, oxygen diffusion and reaction with the silic...
Large phonon band gap in SrTiO3 and the vibrational signatures of ferroelectricity in ATiO3 perovskites: first-principles lattice dynamics and inelastic neutron scattering. Phys. Rev. B 77, 134111 (2008) Article ADS Google Scholar Lasota, C., Wang, C.-Z., Yu, R. & Krakauer, H. Ab ...
It is found that electron transfer to the defect states within the band gap of STO due to hydrogenation brings to STO visible absorption, decrease in intrinsic PL intensity, Fermi level shift, elimination of the EPR signals, and finally, an enhancement of photocatalytic ability. 展开 ...
The cubic perovskite SrTiO3is an important semiconductor oxide with a band gap of 3.2 eV. It has a wide variety of applications such as: dielectric materials, photoluminescent devices, and in photocatalysis. It is conventionally obtained by the classic solid state synthesis (SS), in which TiO2an...
dielectric measurementThe gigantic photo-induced effect of dielectric property in the quantum dielectric material SrTiO 3 has been observed under rather small external DC electric field. The dielectric measurement was performed under UV laser excitation with energy above the band gap combined with a DC...
These results conclude that SrTi1−xScxO3 is a p-type semiconductor with deep acceptor levels lying in the middle of the band gap.T. Higuchi and T. Tsukamoto and S. Yamaguchi and K. Kobayashi and N. Sata and M. Ishigame and S. Shin...