Transparent conductive stannic oxide coatings employing an ultrasonic spray pyrolysis technique:The relevance of the molarity content in the aerosol solution for improvement the electrical properties

摘要

Highly transparent conductive stoichiometric nanocrystalline stannic oxide coatings were deposited onto Corning®EAGLE XG®slim glass substrates.Including each coating,it was deposited for various concentrations in the aerosol solution with the substrate temperature maintained at 623.15 K by an ultrasonic spray pyrolysis(USP)technique.Nitrogen was em-ployed both as the solution carrier in addition to aerosol directing gas,maintaining its flow rates at 3500.0 and 500.0 mL/min,re-spectively.The coatings were polycrystalline,with preferential growth along the stannic oxide(112)plane,irrespective of the molarity content in the spray solution.The coating prepared at 0.2 M,a concentration in the aerosol solution,showed an aver-age transmission of 60%in the visible light region spectrum with a maximum conductivity of 24.86 S/cm.The coatings depos-ited exhibited in the general photoluminescence spectrum emission colors of green,greenish white,and bluish white calcu-lated on the intensities of the excitonic and oxygen vacancy defect level emissions.