Electrodeposition of p-Type Sb₂Te₃ Films and Micro-Pillar Arrays in a Multi-Channel Glass Template

Materials
Ning SuBo Li

Abstract

Antimony telluride (Sb₂Te₃)-based two-dimensional films and micro-pillar arrays are fabricated by electrochemical deposition from electrolytes containing SbO⁺ and HTeO₂⁺ on Si wafer-based Pt electrode and multi-channel glass templates, respectively. The results indicate that the addition of tartaric acid increases the solubility of SbO⁺ in acidic solution. The compositions of deposits depend on the electrolyte concentration, and the micro morphologies rely on the reduction potential. Regarding the electrolyte containing 8 mM of SbO⁺ and 12 mM of HTeO₂⁺, the grain size increases and the density of films decreases as the deposition potential shifts from -100 mV to -400 mV. Sb₂Te₃ film with nominal composition and dense morphology can be obtained by using a deposition potential of -300 mV. However, this condition is not suitable for the deposition of Sb₂Te₃ micro-pillar arrays on the multi-channel glass templates because of its drastic concentration polarization. Nevertheless, it is found that the pulsed voltage deposition is an effective way to solve this problem. A deposition potential of -280 mV and a dissolve potential of 500 mV were selected, and the deposition of micro-pillars in a large aspect ratio and at high density can ...Continue Reading

References

Jul 29, 2003·Nature Materials·G Jeffrey SnyderJean-Pierre Fleurial
May 8, 2009·Physical Chemistry Chemical Physics : PCCP·Xiaohong LiNeil M White
Oct 7, 2010·Langmuir : the ACS Journal of Surfaces and Colloids·Jekaterina KuleshovaNeil M White
Dec 12, 2012·ACS Applied Materials & Interfaces·Jaime MartínMarisol Martín-González
Mar 16, 2015·Materials·Priyanka Jood, Michihiro Ohta
Jan 13, 2018·Materials·Mirosław GierczakAndrzej Dziedzic

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