Optical Properties of Al- and Zr-Doped Rutile Single Crystals Grown by Tilting-Mirror-Type Floating Zone Method and Study of Structure-Property Relationships by First Principle Calculations

High quality and transparent single crystals of undoped rutile TiO2, Al-doped rutile (Al : TiO2), and Zr-doped rutile (Zr : TiO2) have been grown successfully by tilting-mirror-type floating zone (TMFZ) using travelling solvent floating (TSFZ) technique. The effect of doping on the electronic and optical properties of rutile has been studied experimentally as well as by simulation calculations. The effect of doping on the quality of crystals was also investigated by observing optical micrograph and measuring etch pits density that reveals the presence of defects. Undoped rutile crystals were dark blue and comprised many low-angle grain boundaries. Al+3 and Zr+4 ions pin down the migration of dislocations during the cooling and create oxygen vacancies. Doping of the impurities would improve the electronic and optical properties of rutile. The elastic properties might be changed for doping of the impurities in the rutile crystals.

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Electron Density and Its Relation with Electronic and Optical Properties in 2D Mo/W Dichalcogenides

Nanomaterials ◽

10.3390/nano10112221 ◽

2020 ◽

Vol 10 (11) ◽

pp. 2221

Author(s):

Pingping Jiang ◽

Marie-Christine Record ◽

Pascal Boulet

Keyword(s):

Optical Properties ◽

Lattice Mismatch ◽

Compressive Strain ◽

Interatomic Interaction ◽

Structure Property ◽

Electronic And Optical Properties ◽

Cubic Equation ◽

Structure Property Relationships ◽

Stacking Order ◽

Structures And Properties

Two-dimensional MX2 (M = Mo, W; X = S, Se, Te) homo- and heterostructures have attracted extensive attention in electronics and optoelectronics due to their unique structures and properties. In this work, the layer-dependent electronic and optical properties have been studied by varying layer thickness and stacking order. Based on the quantum theory of atoms in molecules, topological analyses on interatomic interactions of layered MX2 and WX2/MoX2, including bond degree (BD), bond length (BL), and bond angle (BA), have been detailed to probe structure-property relationships. Results show that M-X and X-X bonds are strengthened and weakened in layered MX2 compared to the counterparts in bulks. X-X and M-Se/Te are weakened at compressive strain while strengthened at tensile strain and are more responsive to the former than the latter. Discordant BD variation of individual parts of WX2/MoX2 accounts for exclusively distributed electrons and holes, yielding type-II band offsets. X-X BL correlates positively to binding energy (Eb), while X-X BA correlates negatively to lattice mismatch (lm). The resulting interlayer distance limitation evidences constraint-free lattice of vdW structure. Finally, the connection between microscopic interatomic interaction and macroscopic electromagnetic behavior has been quantified firstly by a cubic equation relating to weighted BD summation and static dielectric constant.

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Growth of MgTa2O6 Single Crystals by Floating Zone Method and Their Optical Properties

Journal of the Ceramic Society of Japan ◽

10.2109/jcersj.101.118 ◽

1993 ◽

Vol 101 (1169) ◽

pp. 118-120 ◽

Cited By ~ 8

Author(s):

Mikio HIGUCHI ◽

Kazuto ANDO ◽

Junichi TAKAHASHI ◽

Kohei KODAIRA

Keyword(s):

Optical Properties ◽

Single Crystals ◽

Floating Zone ◽

Zone Method ◽

Floating Zone Method

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An Overview of Conjugated Polymers in their Insulating Forms

MRS Proceedings ◽

10.1557/proc-247-631 ◽

1992 ◽

Vol 247 ◽

Author(s):

Daniel J. Sandman

Keyword(s):

Optical Properties ◽

Electronic Structure ◽

Conjugated Polymers ◽

Single Crystals ◽

Optical Spectroscopy ◽

Structure Property ◽

Structure Property Relationships ◽

Device Applications ◽

Linear Optical Properties ◽

Linear Optical

ABSTRACTA brief overview is presented of the electrical and linear optical properties of conjugated polymers in their electrically insulating forms. Topics discussed include electronic structure and optical spectroscopy, thermochromism, and device applications, particularly electroluminescence. Structure-property relationships are stressed. Particular emphasis is placed on the properties of polydiacetylenes as they are available as macroscopic single crystals and, hence, are the best defined class of conjugated polymers.

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Single crystal growth of bulk InGaZnO4 and analysis of its intrinsic transport properties

CrystEngComm ◽

10.1039/c9ce00007k ◽

2019 ◽

Vol 21 (19) ◽

pp. 2985-2993 ◽

Cited By ~ 3

Author(s):

Yusuke Tanaka ◽

Kazuhiro Wada ◽

Yuki Kobayashi ◽

Takenori Fujii ◽

Saleem J. Denholme ◽

...

Keyword(s):

High Pressure ◽

Optical Properties ◽

Crystal Growth ◽

Single Crystals ◽

Single Crystal Growth ◽

Floating Zone ◽

Zone Method ◽

High Quality ◽

Electrical And Optical Properties ◽

Floating Zone Method

Large, high-quality InGaZnO4 single crystals grown by high-pressure optical floating zone method and its electrical and optical properties.

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Crystal quality and optical properties for Nd:GdVO4 single crystals by a floating zone method

Optical Materials ◽

10.1016/j.optmat.2003.12.017 ◽

2004 ◽

Vol 26 (4) ◽

pp. 343-345 ◽

Cited By ~ 5

Author(s):

Koichi Onodera ◽

Takayo Ogawa ◽

Hitoshi Itagaki ◽

Hiroshi Machida ◽

Satoshi Wada

Keyword(s):

Optical Properties ◽

Single Crystals ◽

Crystal Quality ◽

Floating Zone ◽

Zone Method ◽

Floating Zone Method

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Characterization of defect levels in β-Ga2O3 single crystals doped with tantalum

CrystEngComm ◽

10.1039/d0ce01639j ◽

2021 ◽

Vol 23 (15) ◽

pp. 2835-2841

Author(s):

Haoyue Liu ◽

Naiji Zhang ◽

Junhua Yin ◽

Changtai Xia ◽

Zhe Chuan Feng ◽

...

Keyword(s):

Optical Properties ◽

Single Crystals ◽

Defect Characterization ◽

Floating Zone ◽

Zone Method ◽

Floating Zone Method ◽

Defect Levels

Optical properties and defect characterization of Ta-doped β-Ga2O3 single crystals grown by the optical floating zone method.

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Optical Properties of Rutile Single Crystals Grown Under Pressure by Tilting-Mirror-Type Floating Zone Method

Journal of Scientific Research ◽

10.3329/jsr.v7i1-2.18927 ◽

2015 ◽

Vol 7 (1-2) ◽

pp. 1-9 ◽

Cited By ~ 1

Author(s):

M. A. R. Sarker

Keyword(s):

Optical Properties ◽

Grain Boundaries ◽

Single Crystals ◽

Oxygen Pressure ◽

Applied Pressure ◽

High Oxygen ◽

Blue Color ◽

Floating Zone ◽

Zone Method ◽

High Oxygen Pressure

Rutile single crystals with high quality and high transparency were grown successfully by tilting-mirror-type floating zone (TMFZ) technique. The grown crystals were characterized by polarized optical microscopy, X-ray diffractometer, UV-visible spectrophotometer and etch pits density measurement. The effect of applied pressure during growth on the optical properties and defect density of the rutile crystals were investigated. It was found that the rutile crystals grown under the high oxygen pressure are bright and transparent due to the lower concentration of defects, but rutile crystals grown at ambient or lower oxygen pressure exhibit deep blue color due to presence of defects such as dislocations and grain boundaries. The crystals grown under high oxygen pressure contains no low-angle grain boundaries, indicating that it can be used for high efficiency optical devices.

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Optical properties of trirutile structure MgTa2O6 single crystals grown by optical floating zone method

Modern Physics Letters B ◽

10.1142/s0217984920502814 ◽

2020 ◽

Vol 34 (26) ◽

pp. 2050281

Author(s):

Litong Huang ◽

Qiang Zhou ◽

Fangfei Li ◽

Liang Li

Keyword(s):

Optical Properties ◽

Single Crystals ◽

Room Temperature ◽

Floating Zone ◽

Temperature Dependent ◽

Zone Method ◽

Floating Zone Method ◽

Research Objects ◽

Absorbance Spectra ◽

Temperature Dependent Photoluminescence

[Formula: see text] single crystals with trirutile structure have been employed as research objects in this paper. The absorbance spectra of the [Formula: see text] crystals are presented and the optical bandgap structures of [Formula: see text] are discussed. Both room temperature and temperature-dependent photoluminescence (PL) of [Formula: see text] single crystals are investigated. Significantly, there are two processes in the emission, and the optical phonon participated procedures are observed and described.

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