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2016 Compound Semiconductor Week (CSW) [Includes 28th International Conference on Indium Phosphide & Related Materials (IPRM) & 43rd International Symposium on Compound Semiconductors (ISCS)最新文献

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Structural and thermoelectric properties of TTF-I0.71 organic compound TTF-I0.71有机化合物的结构和热电性能
K. Hayashi, Kento Kuba, Y. Miyazaki
Crystal structure and thermoelectric properties of an organic compound of tetrathiafulvalene (TTF) and iodine (I), TTF-I0.71, were investigated. From X-ray diffraction of TTF-I0.71 powder prepared by a solid state reaction, the superspace group of TTF-I0.71 was determined as C2/m(α0γ)0s. The TTF-Ix thin films were also fabricated on a glass substrate. It was found that the actual composition x increased with film thickness, and reached to about 0.72 above 300 nm. The Seebeck coefficient and electrical conductivity of the films showed time-dependent change, probably due to the homogenization of iodine concentration in the film.
研究了四硫代富二烯(TTF)与碘(I)的有机化合物TTF- i0.71的晶体结构和热电性能。通过固相反应制备的TTF-I0.71粉末的x射线衍射,确定TTF-I0.71的超空间群为C2/m(α0γ)0s。TTF-Ix薄膜也在玻璃衬底上制备。发现实际成分x随膜厚的增加而增加,在300 nm以上达到约0.72。膜的塞贝克系数和电导率随时间变化,可能是由于膜中碘浓度的均匀化。
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引用次数: 2
Growth and characterization of (Zn, Sn, Ga)As2 thin films grown on GaAs(001) substrate by molecular beam epitaxy 分子束外延法在GaAs(001)衬底上生长(Zn, Sn, Ga)As2薄膜及表征
H. Toyota, T. Terauchi, S. Hidaka, T. Kato, N. Uchitomi
We fabricated (Zn, Sn, Ga)As2 thin films grown on semi-insulating GaAs(001) substrate by molecular beam epitaxy and characterized their structural, compositional and electrical properties in terms of conduction-type control. The X-ray diffraction peaks of (Zn, Sn, Ga)As2 films which shift toward lower angle compared with that of (Zn, Sn)As2 film indicate that Ga incorporating in (Zn, Sn)As2 decrease their lattice constants. Compositional analysis by electron-probe micro analyzer (EPMA) indicated that the composition ratios of Zn to all the cation sites are smaller than that of Sn. Hall effect measurements of these (Zn, Sn, Ga)As2 thin films showed n-type conductivity. These results suggest that Ga atoms are substituted for Zn atoms more than Sn atoms and change their conduction type from p-type to n-type.
采用分子束外延法在半绝缘GaAs(001)衬底上制备了(Zn, Sn, Ga)As2薄膜,并从导电型控制的角度对其结构、组成和电学性能进行了表征。(Zn, Sn, Ga)As2薄膜的x射线衍射峰比(Zn, Sn)As2薄膜的x射线衍射峰偏移角度更小,表明Ga的加入降低了(Zn, Sn)As2薄膜的晶格常数。电子探针微量分析仪(EPMA)的成分分析表明,Zn与所有阳离子位的组成比都小于Sn。这些(Zn, Sn, Ga)As2薄膜的霍尔效应测量显示出n型电导率。这些结果表明,Ga原子比Sn原子更容易取代Zn原子,并使其导电类型从p型转变为n型。
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引用次数: 1
Electronic properties of MoS2 nanoribbon with strain using tight binding method 用紧结合法研究应变条件下二硫化钼纳米带的电子特性
Shuoyuan Chen, Yuh‐Renn Wu
The tight binding method was used to calculated the band diagrams of monolayer MoS2 and its nanoribbon structures. Both the quantum confinement effect and the strain effect have been studied. We applied tensile strains on both confined and transport directions of the nanoribbon and investigated the impacts on the band gap and the effective mass. We found that the band gap and the effective mass decrease with an increasing strain. In addition, the tensile strain along the transport direction has better effect on reducing the valence band effective mass. Although the valence band edge changes from K valley to the heavier Γ valley, applying a proper strain can still improve the transport properties.
采用紧密结合法计算了单层二硫化钼及其纳米带结构的能带图。研究了量子约束效应和应变效应。我们在纳米带的约束方向和输运方向分别施加拉伸应变,研究了拉伸应变对带隙和有效质量的影响。随着应变的增大,带隙和有效质量减小。此外,沿输运方向的拉伸应变对降低价带有效质量有较好的效果。虽然价带边从K谷向更重的Γ谷变化,但施加适当的应变仍然可以改善输运性质。
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引用次数: 9
AlGaN/GaN high electron mobility transistors on Si with sputtered TiN Gate 具有溅射TiN栅极的硅基AlGaN/GaN高电子迁移率晶体管
Yang Li, G. Ng, S. Arulkumaran, C. M. Kumar, K. Ang, Zhi Hong Liu
Summary form only given. We have investigated the Schottky barrier diode (SBD) and device (DC and pulsed I-V) characteristics of AlGaN/GaN HEMTs fabricated with sputtered TiN Schottky gate. The measured Schottky barrier height (SBH) of TiN on Al0.26Ga0.74N/GaN HEMT structure are 1.126 and 1.105 eV by I-V and I-V-T measurements, respectively. No hysteresis is observed in between forward and reverse C-V sweeps of TiN SBD. Compared to Ni/Au Schottky gate, the HEMT with TiN gate shows comparable DC output and transfer characteristics, improved OFF-state breakdown voltage (VBRoff) with very small drain current collapse, indicating the feasibility of using sputtered TiN for the fabrication of CMOS-compatible AlGaN/GaN HEMTs.
只提供摘要形式。我们研究了用溅射TiN肖特基栅制备的AlGaN/GaN hemt的肖特基势垒二极管(SBD)和器件(直流和脉冲I-V)特性。通过I-V和I-V- t测量,TiN在Al0.26Ga0.74N/GaN HEMT结构上的肖特基势垒高度(SBH)分别为1.126和1.105 eV。在TiN SBD的正向和反向C-V扫描之间没有观察到迟滞。与Ni/Au肖特基栅极相比,带TiN栅极的HEMT具有相当的直流输出和传输特性,提高了off状态击穿电压(VBRoff),漏极电流崩溃很小,表明使用溅射TiN制造cmos兼容的AlGaN/GaN HEMT是可行的。
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引用次数: 13
Experimental demonstration of strain detection using resonant tunneling delta-sigma modulation sensors 用共振隧道δ - σ调制传感器进行应变检测的实验演示
Takumi Tajika, Y. Kakutani, M. Mori, K. Maezawa
A strain sensor was fabricated based on a resonant tunneling diode (RTD) oscillator. This sensor uses strain dependent frequency change of the RTD oscillator, and the frequency delta-sigma modulation (frequency DSM, or FDSM) technique, which can convert a frequency to a digital signal with wide dynamic range and wide bandwidth. The sensor consists of an oscillator using an LC resonator and an RTD loaded on a beam of the cantilever. The cantilever was fabricated using selective wet etching of the InP substrate. In this sensor, the strain applied to the cantilever changes the current-voltage characteristics of the RTD due to the piezoelectric effect, and hence it changes the oscillation frequency. In this paper, it is demonstrated that the acoustic strain signal can be successfully detected by this sensor with noise shaping behavior, which is a unique nature of the DSM.
基于谐振隧道二极管(RTD)振荡器制备了一种应变传感器。该传感器利用RTD振荡器的应变相关频率变化和频率δ - σ调制(frequency DSM,或FDSM)技术,可以将频率转换为具有宽动态范围和宽带宽的数字信号。该传感器由一个使用LC谐振器的振荡器和一个加载在悬臂梁上的RTD组成。采用选择性湿法蚀刻InP衬底制备悬臂梁。在该传感器中,由于压电效应,施加在悬臂上的应变改变了RTD的电流-电压特性,从而改变了振荡频率。在本文中,证明了该传感器可以成功地检测声应变信号,并具有噪声整形行为,这是DSM的独特性质。
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引用次数: 6
Fabrication and characterization of BiFeO3 thin films and application for photovoltaic devices BiFeO3薄膜的制备、表征及其在光伏器件中的应用
Y. Shirahata, A. Suzuki, T. Oku
Bismuth ferrite (BiFeO3) thin films were fabricated by a simple spin-coating method. Polycrystalline BiFeO3 thin films were confirmed by X-ray diffraction. Lattice constants and crystallite sizes of the BiFeO3 thin films increased with increasing concentration of BiFeO3 precursor solution. BiFeO3/CH3NH3PbI3 photovoltaic devices were fabricated to characterize photovoltaic properties. Current density-voltage characteristics of the photovoltaic devices exhibited rectifying behaviors, indicating that BiFeO3 layer acted an electron transport layer.
采用简单的旋涂法制备了铋铁氧体(BiFeO3)薄膜。通过x射线衍射证实了多晶BiFeO3薄膜的存在。随着BiFeO3前驱体溶液浓度的增加,BiFeO3薄膜的晶格常数和晶粒尺寸增大。制备了BiFeO3/CH3NH3PbI3光伏器件,对其光伏性能进行了表征。光电器件的电流密度-电压特性表现出整流行为,表明BiFeO3层起到了电子输运层的作用。
{"title":"Fabrication and characterization of BiFeO3 thin films and application for photovoltaic devices","authors":"Y. Shirahata, A. Suzuki, T. Oku","doi":"10.1109/ICIPRM.2016.7528694","DOIUrl":"https://doi.org/10.1109/ICIPRM.2016.7528694","url":null,"abstract":"Bismuth ferrite (BiFeO<sub>3</sub>) thin films were fabricated by a simple spin-coating method. Polycrystalline BiFeO<sub>3</sub> thin films were confirmed by X-ray diffraction. Lattice constants and crystallite sizes of the BiFeO<sub>3</sub> thin films increased with increasing concentration of BiFeO<sub>3</sub> precursor solution. BiFeO<sub>3</sub>/CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub> photovoltaic devices were fabricated to characterize photovoltaic properties. Current density-voltage characteristics of the photovoltaic devices exhibited rectifying behaviors, indicating that BiFeO<sub>3</sub> layer acted an electron transport layer.","PeriodicalId":357009,"journal":{"name":"2016 Compound Semiconductor Week (CSW) [Includes 28th International Conference on Indium Phosphide & Related Materials (IPRM) & 43rd International Symposium on Compound Semiconductors (ISCS)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128968342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comprehensive analysis on electrically pumped metallic cavity lasers 电泵浦金属腔激光器的综合分析
Chuanqing Yu, Baifu Zhang, Yi Xiao, Takuo Tanemura, Y. Nakano
We present the design of an electrically pumped metallic cavity laser based on optical, electrical and thermal simulations. By inserting an InAlAs blocking layer, leakage current is effectively suppressed, leading to 50% reduction of threshold current together with better thermal stability. Through combined optical and electrical analyses, the insulation layer thickness is set to be 60 nm, where the device shows optimized overall performance.
在光学、电学和热模拟的基础上,设计了一种电泵浦金属腔激光器。通过插入InAlAs阻断层,可以有效抑制泄漏电流,使阈值电流降低50%,并具有更好的热稳定性。通过综合光学和电学分析,将绝缘层厚度设置为60 nm,该器件显示出最佳的整体性能。
{"title":"Comprehensive analysis on electrically pumped metallic cavity lasers","authors":"Chuanqing Yu, Baifu Zhang, Yi Xiao, Takuo Tanemura, Y. Nakano","doi":"10.1109/ICIPRM.2016.7528619","DOIUrl":"https://doi.org/10.1109/ICIPRM.2016.7528619","url":null,"abstract":"We present the design of an electrically pumped metallic cavity laser based on optical, electrical and thermal simulations. By inserting an InAlAs blocking layer, leakage current is effectively suppressed, leading to 50% reduction of threshold current together with better thermal stability. Through combined optical and electrical analyses, the insulation layer thickness is set to be 60 nm, where the device shows optimized overall performance.","PeriodicalId":357009,"journal":{"name":"2016 Compound Semiconductor Week (CSW) [Includes 28th International Conference on Indium Phosphide & Related Materials (IPRM) & 43rd International Symposium on Compound Semiconductors (ISCS)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116565791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
GaInAsP/SOI hybrid laser with AlInAs-oxide confinement structure fabricated by plasma activated bonding 等离子体激活键合制备具有AlInAs-oxide约束结构的GaInAsP/SOI混合激光器
Jun-ichi Suzuki, S. Inoue, Shovon M. D. Tanvir Hasan, Y. Hayashi, T. Amemiya, N. Nishiyama, S. Arai
We realized GaInAsP/SOI hybrid Fabry-Pérot (FP) laser with AlInAs-oxide current confinement structure for PICs on a silicon platform. Using hybrid wafers by a plasma activated bonding technique, an AlInAs layer just above GaInAsP quantum wells was oxidized by wet oxidation. A threshold current of 50 mA and an external differential quantum efficiency of 11%/facet were obtained with the unoxidezed stripe width of 4.5 μm and the cavity length of 500 μm.
我们在硅平台上实现了具有AlInAs-oxide电流约束结构的GaInAsP/SOI混合fabry - p (FP)激光器。采用等离子体激活键合技术,采用湿氧化法氧化GaInAsP量子阱上方的AlInAs层。在未氧化条纹宽度为4.5 μm,腔长为500 μm的条件下,获得了阈值电流为50 mA,外差分量子效率为11%/facet。
{"title":"GaInAsP/SOI hybrid laser with AlInAs-oxide confinement structure fabricated by plasma activated bonding","authors":"Jun-ichi Suzuki, S. Inoue, Shovon M. D. Tanvir Hasan, Y. Hayashi, T. Amemiya, N. Nishiyama, S. Arai","doi":"10.1109/ICIPRM.2016.7528752","DOIUrl":"https://doi.org/10.1109/ICIPRM.2016.7528752","url":null,"abstract":"We realized GaInAsP/SOI hybrid Fabry-Pérot (FP) laser with AlInAs-oxide current confinement structure for PICs on a silicon platform. Using hybrid wafers by a plasma activated bonding technique, an AlInAs layer just above GaInAsP quantum wells was oxidized by wet oxidation. A threshold current of 50 mA and an external differential quantum efficiency of 11%/facet were obtained with the unoxidezed stripe width of 4.5 μm and the cavity length of 500 μm.","PeriodicalId":357009,"journal":{"name":"2016 Compound Semiconductor Week (CSW) [Includes 28th International Conference on Indium Phosphide & Related Materials (IPRM) & 43rd International Symposium on Compound Semiconductors (ISCS)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133640282","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling InGaAs MOVPE in V-grooves and pyramidal recesses 在v型凹槽和锥体凹槽中模拟InGaAs MOVPE
S. Moroni, V. Dimastrodonato, T. Chung, G. Juska, A. Gocalinska, D. Vvedensky, E. Pelucchi
In this work we present the modeling of Metal Organic Vapour-Phase Epitaxy (MOVPE) of InGaAs nanostructures in non-planar V-grooves and pyramidal recesses. Our well-established growth model has been first employed to find a set of optimized kinetic parameters for InGaAs epitaxy by fitting the morphological and compositional evolution during the growth of In0.12Ga0.88As V-groove quantum wires. These parameters allowed also reproducing the growth of In0.25Ga0.75As nanostructures formed in pyramidal site-controlled quantum dot systems. Finally, the temperature dependence of the structures resulting from our simulation has been compared to the optical properties previously reported in our studies.
在这项工作中,我们提出了在非平面v型凹槽和锥体凹槽中InGaAs纳米结构的金属有机气相外延(MOVPE)的建模。我们建立的生长模型首次通过拟合In0.12Ga0.88As v槽量子线生长过程中的形态和成分演变,找到了一组优化的InGaAs外延动力学参数。这些参数也允许再现在金字塔位控制量子点系统中形成的In0.25Ga0.75As纳米结构的生长。最后,由我们的模拟得出的结构的温度依赖性已经与我们研究中先前报道的光学性质进行了比较。
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引用次数: 0
First principles study of the diffusion of oxygen vacancies in Ga2O3 Ga2O3中氧空位扩散的第一性原理研究
A. Kyrtsos, M. Matsubara, E. Bellotti
Using Density Functional Theory we have investigated the migration of oxygen vacancies and hydrogen impurities in the oxide β-Ga2O3. For our studies we used the Nudged Elastic Band (NEB) method in order to determine the Minimum Energy Paths (MEP) and the migration barriers. Neutral and doubly charged oxygen vacancies are considered to be the most common intrinsic defects in Ga2O3. In addition, hydrogen is a common background impurity. Our results indicate that these defects are mobile at growth temperatures.
利用密度泛函理论研究了氧化β-Ga2O3中氧空位和氢杂质的迁移。在我们的研究中,我们使用了微推弹性带(NEB)方法来确定最小能量路径(MEP)和迁移障碍。中性和双带电氧空位被认为是Ga2O3中最常见的内在缺陷。此外,氢是一种常见的背景杂质。我们的结果表明,这些缺陷在生长温度下是可移动的。
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引用次数: 0
期刊
2016 Compound Semiconductor Week (CSW) [Includes 28th International Conference on Indium Phosphide & Related Materials (IPRM) & 43rd International Symposium on Compound Semiconductors (ISCS)
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