Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

Characterization of thin coatings based on ZnO for photonic applications



  1. Centro de Tecnología de Recursos Minerales y Cerámica (CIC-CONICET La Plata) Cno. Centenario y 506 M.B. Gonnet (1897), Buenos Aires, Argentina
  2. Universidad Nacional de Quilmes, Departamento de Ciencia y Tecnología, Laboratorio de Bio-Nanotecnologia, Bernal, Buenos Aires, Argentina
  3. GBEyB, Multidisciplinary Institute of Cell Biology [IMBICE, dependent of the Argentine Research Council (CONICET), Scientific Research Commission, Province of Buenos Aires (CIC-PBA) and UNLP] La Plat
  4. Instituto de Investigaciones en Ciencia y Tecnología de Materiales, Av. Colón 10850, Mar del Plata (7600), Buenos Aires, Argentina


We present a comparison between zinc oxide films made by sol-gel dip-coating and spray-pyrolysis to be employed in opto-electronic applications. Grain size, shape, roughness, thickness, band gap, composition, crystalline orientation, electrical resistivity, and optical guided modes were evaluated by AFM, SEM, EDS, optical transmittance, electrical resistance, and end-fire coupling method, respectively. From these results, it was determined that dip-coated film is thinner (with a thickness of about 130 nm) than the spray-pyrolysis one (of about 500 nm), whereas the former showed lower roughness and higher electrical resistivity. Furthermore, a 532 nm continuous laser was coupled across the sprayed film because of its greater thickness. We conclude that the studied techniques can be complementarily implemented to obtain high-performance coatings for photonic applications, combining the lower roughness of dip coating and the wider thickness of spray-pyrolysis films..


Sol-gel thin films, Dip-coating, Spray pyrolysis.


G. SUAREZ, F. C. ALVIRA, R. PARRA, M. R. TEJERINA, Characterization of thin coatings based on ZnO for photonic applications, Optoelectronics and Advanced Materials - Rapid Communications, 13, 9-10, September-October 2019, pp.535-538 (2019).

Submitted at: Jan. 11, 2019

Accepted at: Oct. 9, 2019