Journal ArticleDOI
Micro-Raman spectroscopy studies of bulk and thin films of CuInTe2
TLDR
In this paper, micro-Raman spectroscopy measurements were made on polycrystalline and amorphous thin films of CuInTe2 as well as bulk polycrystaline CuInTE2.Abstract:
Micro-Raman spectroscopy measurements were made on polycrystalline and amorphous thin films of CuInTe2 as well as bulk polycrystalline CuInTe2. Various vibrational modes exhibited by the bulk and polycrystalline thin films were attributed to those expected for single crystal CuInTe2. Raman spectra of amorphous films presented a broad spectrum, decomposition of which revealed the presence of elemental tellurium on the film surface. Laser-induced changes on CuInTe2 thin films were studied by acquiring spectra with higher laser beam power. Modes due to tellurium appeared when the spectra were acquired during laser–sample interaction, indicating tellurium segregation. The Raman spectra measured from polycrystalline films during high laser power irradiation did not show decrease in the intensity of the A1 mode of CuInTe2 in spite of loss of tellurium from the lattice. This has been interpreted as related to an increased contribution from the undistorted subsurface CuInTe2 region at higher excitation power.read more
Citations
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Characterization of electrochemically deposited CuInTe2 thin films for solar cell applications
TL;DR: In this article, a 3-electrode geometry consisting of working, counter and reference electrodes was used to perform the electrochemical studies and the deposition potential, −0.75 V with respect to Ag/AgCl was optimized by cyclic voltammetry (CV).
Journal ArticleDOI
Coherent optical phonon spectroscopy studies of femtosecond-laser modified Sb2Te3 films
TL;DR: In this paper, the authors performed time-resolved reflectivity measurements to monitor changes in optical phonon modes in Sb2Te3 thin films under femtosecond laser irradiation.
Journal ArticleDOI
High‐Performance Memristors Based on Ultrathin 2D Copper Chalcogenides
TL;DR: Benefiting from the highly active Cu ions with low migration barriers, the memristors based on ultrathin 2D copper chalcogenide crystals exhibit relatively small switching voltage, fast switching speed, high switching uniformity and wide operating temperature range, as well as stable retention and good cyclic endurance.
Journal ArticleDOI
Hydrothermal synthesis of chalcopyrite CuInS2, CuInSe2 and CuInTe2 nanocubes and their characterization
TL;DR: In this paper, three types of chalcopyrite nanocubes were successfully synthesized by hydrothermal process using deionized water as solvent at 180°C for 20h.
Journal ArticleDOI
Development of CuInTe2 thin film solar cells by electrochemical route with low temperature (80 °C) heat treatment procedure
TL;DR: In this paper, the effect of successive low-temperature heat treatment on the properties of electrodeposited CuInTe 2 (CIT) thin films is investigated by cyclic voltammetry onto CdS coated Fluorine doped tin oxide substrate.
References
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19·9%‐efficient ZnO/CdS/CuInGaSe2 solar cell with 81·2% fill factor
Ingrid Repins,Miguel A. Contreras,Brian Egaas,Clay DeHart,John Scharf,Craig L. Perkins,Bobby To,Rommel Noufi +7 more
TL;DR: In this paper, the authors reported a new record total area efficiency of 19·9% for thin-film solar cells using three-stage co-evaporation with a modified surface termination.
Journal ArticleDOI
Raman Spectra and Lattice Dynamics of Tellurium
A. S. Pine,G. Dresselhaus +1 more
TL;DR: In this article, the Raman spectrum of trigonal tellurium has been obtained at 295 and 90 degrees K. The results were used to construct a lattice-dynamical model based on a symmetrized Fourierexpansion scheme incorporating generalized noncentral forces.
Journal ArticleDOI
Thin Film Deposition Methods for CuInSe2Solar Cells
TL;DR: In this paper, the concept and operation principle of thin-film solar cells, as well as the most important thin film solar cell materials are discussed, and the properties of CuInSe2 and related compounds are reviewed.
Journal ArticleDOI
Raman spectroscopy of amorphous and microcrystalline silicon films deposited by low‐pressure chemical vapor deposition
TL;DR: In this article, the structural properties of amorphous and micro-crystalline silicon films were investigated using Raman spectroscopy, and it was found that a strong relationship exists between the structural order of the silicon matrix and the deposition temperature and deposition rate, and that optimization of the asdeposited silicon microstructure is possible by selecting deposition conditions yielding peak-ratio values in the vicinity of 0.53.
Journal ArticleDOI
Raman spectra of CuInSe2.
TL;DR: Gan et al. as discussed by the authors measured Raman spectra of single crystals at room and low temperatures and determined all Raman active modes, including the optical-phonon modes.