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Thermochromic VO2on Zinnwaldite Mica by pulsed laser deposition

VO2thin films have been deposited by pulsed laser deposition on Zinnwaldite Mica substrates. Thecrystal structure, chemical composition, morphology were determined and the semiconductor/metaltransition (SMT) properties of the deposited films were investigated. Without any post annealing, thefilms exhibit a textured nature with a VO2(0 1 1) preferred crystallographic orientation and an elevatedthermal variation of the electric resistance ratio RS/RMthrough the SMT at T ? 68?C of the order of 104anda narrow ?7?C hysteresis. In addition, the growth of the VO2crystallites seem to be governed likely bya Volmer-Weber or Stranski-Krastanov mechanisms and certainly not a Frank-van Der Merwe process.

Auteur(s) : L. Mathevula,?, B.D. Ngom, L. Kotsedi, P. Sechogela, T.B. Doyle,c,M. Ghouti, M. Maazaa,
Pages : 476–480
Année de publication : 2014
Revue : Applied Surface Science
N° de volume : 314
Type : Article
Mise en ligne par : NGOM Balla Diop