期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
Effect of dimensional expansion on carrier transport behaviors of the hexagonal Bi-based perovskite crystals 被引量:1
1
作者 Qihao Sun Bao Xiao +7 位作者 Leilei Ji Dou Zhao Jinjin Liu Wei Zhang Menghua Zhu Wanqi Jie Bin-Bin Zhang Yadong Xu 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2022年第3期459-465,I0013,共8页
All-inorganic Cs_(3)Bi_(2)I_(9)(CBI)halide perovskites are sought to be candidate for photoelectrical materials because of their low toxicity and satisfactory stability.Unfortunately,the discrete molecular[Bi2I9]3−clu... All-inorganic Cs_(3)Bi_(2)I_(9)(CBI)halide perovskites are sought to be candidate for photoelectrical materials because of their low toxicity and satisfactory stability.Unfortunately,the discrete molecular[Bi2I9]3−clusters limit the charge-transport behaviors.Herein,the defect halide perovskite based on trivalent Bi^(3+)is expanded to Cs_(3)Bi_(2)I_(6)Br_(3)(CBIB).Centimeter-size CBIB single crystal(Φ15×70 mm^(3))was grown by the vertical Bridgeman method.The powder X-ray diffraction analysis shows that CBIB has structure with lattice parameters of a=b=8.223Å,c=10.024Å,α=β=90°andγ=120°.The density functional theory(DFT)calculations demonstrate that the charge density distribution was enhanced after the dimensional expansion.The enhancement of carrier transport ability of(00l)in-plane is characterized before and after dimensional improvement.The obtained CBIB(001)exhibited an electron mobility up to 40.03 cm^(2)V^(−1)s^(−1)by time-of-flight(TOF)technique,higher than 26.46 cm^(2)V^(−1)s^(−1)of CBI(001).Furthermore,the X-ray sensitivity increases from 707.81μC Gy^(−1)cm^(−2)for CBI(001)to 3194.59μC Gy−1 cm^(−2)for CBIB(001).This research will deepen our understanding of Bi-based perovskite materials and afford more promising strategies for lead-free perovskite optoelectronic devices modification. 展开更多
关键词 Bi-based perovskite dimensional expansion Carrier transport Bridgeman method Radiation detection
下载PDF
HAUSDORFF DIMENSION OF SOME KIND OF ALTERNATING OPPENHEIM SERIES EXPANSION
2
作者 Luming Shen Chao Ma Yuehua Liu 《Analysis in Theory and Applications》 2007年第2期171-179,共9页
For Oppenheim series epansions, the authors of [7] discussed the exceptional sets Bm={x∈(0,1]:1〈dj(x)/h(j-1)(d(j-1)(x))≤m for any j ≥2} In this paper, we investigate the Hausdorff dimension of a kind o... For Oppenheim series epansions, the authors of [7] discussed the exceptional sets Bm={x∈(0,1]:1〈dj(x)/h(j-1)(d(j-1)(x))≤m for any j ≥2} In this paper, we investigate the Hausdorff dimension of a kind of exceptional sets occurring in alternating Oppenheim series expansion. As an application, we get the exact Hausdorff dimension of the-set in Luroth series expansion, also we give an estimate of such dimensional number. 展开更多
关键词 alternating Oppenheim series expansion alternating Luroth series expansion Hausdorff dimension
下载PDF
A model for expansion ratio in liquid-solid fluidized beds
3
作者 Alok Tripathy A.K.Sahu +1 位作者 S.K.Biswal B.K.Mishra 《Particuology》 SCIE EI CAS CSCD 2013年第6期789-792,共4页
Liquid-solid fluidized beds are used in mineral processing industries to separate particles based on parti- cle size, density, and shape. Understanding the expanded fluidized bed is vital for accurately assessing its ... Liquid-solid fluidized beds are used in mineral processing industries to separate particles based on parti- cle size, density, and shape. Understanding the expanded fluidized bed is vital for accurately assessing its performance. Expansion characteristics of the fluidized bed were studied by performing several experi- ments with iron ore, chromite, quartz, and coal samples. Using water as liquid medium, experiments were conducted to study the effects of particle size, particle density, and superficial velocity on fluidized bed expansion. The experimental data were utilized to develop an empirical mathematical model based on dimensional analysis to estimate the expansion ratio of the fluidized bed in terms of particle character- istics, operating and design parameters. The predicted expansion ratio obtained from the mathematical model is in good agreement with the experimental data. 展开更多
关键词 Fluidization Bed expansion Mathematical modelling dimensional analysis Particle processing Void fraction
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部