Dopant incorporation during epitaxial growth of a multicomponent oxide thin film from vapor phase: A case study of Fe/YBa2Cu3O7−δ system

1995 ◽  
Vol 66 (13) ◽  
pp. 1674-1676 ◽  
Author(s):  
S. B. Ogale ◽  
I. Takeuchi ◽  
M. Rajeswari ◽  
R. L. Greene ◽  
T. Venkatesan ◽  
...  
Author(s):  
Alexandru Focsha ◽  
Petru Gashin ◽  
Alexei Simashkevich

Abstract Thin layer ZnTe-CdSe heterojunctions were produced by vapor phase epitaxial growth of ZnTe and CdSe layers on mica and single-crystal ZnSe substrates. These heterojunctions photosensitivity covers the wavelength region of 0.56–0.85 μm. The shape of photosensitivity spectral dependence of ZnTe-CdSe heterojunction depends on the components thickness and their doping level. Thin layer ZnTe-CdSe epitaxial heterojunction parameters under illumination of 80 mW/cm2 (AM1.5) are: FF=0.53, Uoc=0.72V, Isc=14.8 mA/cm2, efficiency η=7.1%. Thin film polycrystalline ZnTe-CdSe heterojunctions having the efficiency η=4.3%, Uoc=0.54 V, Isc=10.6 mA/cm2 were fabricated by using As or Cu doped ZnTe layers and In doped CdSe layers produced by HWT.


2010 ◽  
Vol 25 (3) ◽  
pp. 422-426 ◽  
Author(s):  
Tsung-Han Yang ◽  
Chunming Jin ◽  
Ravi Aggarwal ◽  
R.J. Narayan ◽  
Jay Narayan

We report the characteristics of epitaxial growth and properties of vanadium oxide (VO2) thin films on sapphire (0001) substrates. Pulsed laser deposition was used to grow (002) oriented VO2 films on sapphire (0001). Transmission electron microscopy studies showed that the orientation relationship between the substrate and the thin film is: (002)f2∥(0006)sub3 and [010]f2 ∥sub. It was also established that VO2 has three different orientations in the film plane which are rotated by 60° from each other. The epitaxial growth of vanadium oxide on sapphire (0001) has been explained in the framework of domain matching epitaxy (DME). Electrical resistivity measurements as a function of temperature showed a sharp transition with a hysteresis width ˜5 °C, and large resistance change (˜1.5 × 104) from the semiconductor phase to the metal phase. It is interesting to note that in spite of large angle twin boundaries in these VO2 films, the SMT characteristics are better than those observed for polycrystalline films. The higher width of thermal hysteresis for the VO2 film on c-sapphire compared to a bulk single VO2 crystal and a single-crystal VO2 film on r-sapphire can be attributed to the existence of these large-angle twin grain boundaries. These findings can provide insight into the phase transformation characteristics of VO2, which has important applications in switching and memory devices.


2009 ◽  
Vol 12 (8) ◽  
pp. H288 ◽  
Author(s):  
R. Henríquez ◽  
P. Grez ◽  
E. Muñoz ◽  
E. A. Dalchiele ◽  
R. Marotti ◽  
...  

2018 ◽  
Vol 57 (11S) ◽  
pp. 11UF04 ◽  
Author(s):  
Hiroki Tanaka ◽  
Kiyoshi Uchiyama ◽  
Takahiro Oikawa ◽  
Takao Shimizu ◽  
Hiroshi Funakubo

2001 ◽  
Vol 388 (1-2) ◽  
pp. 177-182 ◽  
Author(s):  
N. Savvides ◽  
A. Thorley ◽  
S. Gnanarajan ◽  
A. Katsaros

1995 ◽  
Vol 401 ◽  
Author(s):  
M. Yoshimoto ◽  
T. Maeda ◽  
T. Ohnishi ◽  
G. H. Lee ◽  
H. Koinuma

AbstractAdvanced thin film technology based on laser MBE has enabled us to control the molecular layer-by-layer epitaxial growth and interface structure of oxide thin films in an atomic scale. Molecular layer epitaxy of oxide thin film growth was verified from in situ monitoring of intensity oscillation in reflection high energy electron diffraction (RHEED). Advanced oxide thin film technology was applied to form oxide superlattices for quantum functional oxides and to achieve lattice-matched heteroepitaxy in oxide films on silicon substrate for all epitaxial oxide/silicon hybrid devices. The key factors to develop oxide lattice engineering are discussed with respect to not only in situ monitoring of growth process using RHEED but also atomic regulation of the substrate surface by atomic force microscopy and ion scattering spectroscopy.


2015 ◽  
Vol 135 (6) ◽  
pp. 192-198 ◽  
Author(s):  
Shinnosuke Iwamatsu ◽  
Yutaka Abe ◽  
Toru Yahagi ◽  
Seiya Kobayashi ◽  
Kazushige Takechi ◽  
...  

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