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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 photoelectrochemical behavior of an n-TiO2 (rutile) single crystal under different treatments (mechanical polishing and chemical and photo electrochemical etching) is analyzed and the conditions under which Gartner's model can be applied are determined.
Abstract: The photoelectrochemical behavior of an n‐TiO2 (rutile) single crystal under different treatments (mechanical polishing and chemical and photoelectrochemical etching) is analyzed and the conditions under which Gartner’s model can be applied are determined. The hole diffusion length Lp obtained from the photoelectrochemical data is about 10−6 cm for the etched single crystal and seems to be governed by electron‐hole recombination at centers associated to impurities introduced in the lattice during the manufacturing process. This value of the hole diffusion length determines the minimum value of the donor concentration Nd for an efficient separation of carriers within the semiconductor depletion layer. This explains the existence of a maximum of the quantum efficiency for Nd∼6×1018 cm−3, which has been found to be a value common to n‐TiO2 single crystals of different origin. Lattice deffects introduced near the crystal surface by mechanical polishing behave as recombination centers which reduce Lp to values...
208 citations
TL;DR: In this paper, single crystal In(OH)3 nanocubes were synthesized by a designed novel hydrothermal treatment, and the size can be simply moderated by varying the Hydrothermal temperature.
Abstract: Single crystal In(OH)3 nanocubes were synthesized by a designed novel hydrothermal treatment, and the size can be simply moderated by varying the hydrothermal temperature By calcining the In(OH)3 nanocubes in air at 400 °C, single crystal In2O3 nanocubes were also prepared with the size slightly shrinking Room temperature photoluminescence showed a broad photoluminescence emission spectrum in the blue-green region with its maximum intensity centered at 450 nm, which was mainly attributed to the effect of the oxygen deficiencies
208 citations
TL;DR: In this article, a cubic-tetragonal martensitic transformation was observed in an ordered Fe3Pt single crystal with degree of order of about 0.8 and magnetic field of 4 T was applied to the specimen along 〈001'' at 4.2 K and removed.
Abstract: Magnetostriction measurements have been made in an ordered Fe3Pt single crystal with degree of order of about 0.8, which exhibits a cubic-tetragonal martensitic transformation at 97 K. The specimen was cooled down to 4.2 K without magnetic field, and then a magnetic field of 4 T is applied to the specimen along 〈001〉 at 4.2 K and removed. As a result, a reversible giant magnetostriction of about 0.5% is observed. This reversible magnetostriction will be caused by the rearrangement of crystallographic domains, being three times as large as that of Terfenol-D (Fe2DyxTb1−x: typical magnetostrictive materials).
207 citations
TL;DR: In this article, the authors present an overview of the historic evolution in understanding of carrier diffusion length in CH3NH3PbI3, the initial investigations of the synthesis of single crystalline hybrid perovskites, and the characterization of their optoelectronic properties.
Abstract: Hybrid perovskite single crystals have been recently revealed to have superior optoelectronic properties to perovskite polycrystalline thin films, especially the extraordinarily long carrier diffusion length due to the eliminated grain boundaries. One question that naturally arises is whether the single crystal hybrid perovskites can be a next wave of photoactive materials for even higher-efficiency devices. This Perspective presents an overview of the historic evolution in understanding of carrier diffusion length in CH3NH3PbI3, the initial investigations of the synthesis of single crystalline hybrid perovskites, and the characterization of their optoelectronic properties. Our analysis indicates that single crystalline perovskite materials have potential to further boost photovoltaic device power conversion efficiency to 25%. The potential opportunities for the fundamental study of the perovskite intrinsic properties, particularly the carrier mobility and carrier recombination lifetime, and other fields ...
207 citations
TL;DR: In this article, the authors explore the origins of the capacitance dispersion observed for single crystal electrodes, voltammetric and impedance measurements on Au(l 11) and Au(100), in the absence and the presence of specifically adsorbed anions, mostly Br−, have been carried out.
207 citations