Topic
Single crystal
About: Single crystal is a research topic. Over the lifetime, 59617 publications have been published within this topic receiving 870828 citations.
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TL;DR: In this paper, the electrical resistivity of RNiSn is very high (3
Abstract: The new class of intermetallic compounds RNiSn(R=Ti,Zr,Hf) may be characterised by the presence of an ordered sublattice of Ni atom vacancies in comparison with normal metals RNi2Sn with no Ni vacancies. We report unusual transport and optical properties of the RNiSn system. The electrical resistivity of RNiSn is very high (3
220 citations
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220 citations
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TL;DR: In this article, the growth of CsPbBr3 single crystal was revealed to be of a 2D nucleation mechanism and the similarity of d values and octahedra arrangements along [101] and [020] orientations restricted single-crystal growth.
Abstract: Band gap tunable hybrid organic–inorganic lead halide perovskites (APbX3, A = CH3NH3+ and NH2CH═NH2+, and X = Cl, Br, or I) have attracted significant attention in optoelectronic- and photovoltaic-related fields on account of their outstanding optoelectronic properties. Single crystals of hybrid perovskites, such as CH3NH3PbI3 and CH3NH3PbBr3, were certified to be advantageous over thin films as photodetectors. However, their resistance toward heat and moisture hinders their future development. Fully inorganic perovskite CsPbBr3 stands a chance to fill the gap as a novel photodetector with perovskite structure. We revealed the growth of CsPbBr3 single crystal was of a 2D nucleation mechanism. Similarities of d values and octahedra arrangements along [101] and [020] orientations restricted single-crystal growth. Under optimized conditions, orthorhombic CsPbBr3 single crystals with (101) crystallographic facets were grown by using methyl alcohol as antisolvent from saturated DMSO solution. The optoelectroni...
219 citations
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IBM1
TL;DR: In this article, a liquid solution synthesis for preparing single crystal germanium quantum wires is presented, based on the reduction of GeCl 4 and phenyl-GeCl 3 by sodium metal in an alkane solvent at elevated temperature and pressure.
219 citations
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TL;DR: In this article, the laser conversion efficiency of pore-free polycrystalline Nd:YAG (Y 3 Al 5 O 12 ) and Yb-doped YAG single crystal was reported.
Abstract: This paper reports recent progress in the production of polycrystalline Nd:YAG (Y 3 Al 5 O 12 ), Nd:YSAG (Y 3 Sc 1.0 Al 4.0 O 12 ), Yb:YSAG ceramics, and a Nd-doped YAG single crystal with an almost perfect pore-free structure by advanced ceramic processing. The laser conversion efficiency of pore-free polycrystalline Nd- and Yb-doped ceramics is extremely high, and their optical qualities are comparable with that of commercial high-quality Nd:YAG single crystals. We have also succeeded in the fabrication of a Nd:YAG single crystal, which can be used for laser oscillation, by the solid-state reaction method. Laser oscillation efficiency was very low when the pores remained inside the single crystal; however, the laser oscillation efficiency of the pore-free Nd:YAG single crystal was slightly higher than that of polycrystalline Nd:YAG ceramics having high optical quality. From this fact, it was recognized that optical scattering occurs mainly in the residual pores inside the Nd:YAG ceramics and the scattering at the grain boundary is very less. In addition, we confirmed that a heavily doped Nd:YAG single crystal can be fabricated by the sintering method. Moreover, we have demonstrated the fabrication of a composite ceramic with complicated structures without the need for precise polishing and diffusion bonding. Advanced ceramic processing, which enables design flexibility of the laser element, presented in this work is important in the development of a high-performance laser (high efficiency, high beam quality, and high output energy, etc.).
219 citations