Highly textured ZnO:Al/ITO bilayers with excellent electrical and light-scattering properties were prepared on glass substrates using RF magnetron sputtering followed by a wet-etching process. In the bilayer structure, the sputtered ZnO:Al films were deposited on highly conductive ITO-coated glass substrates, and the ZnO:Al surfaces were subsequently chemically etched with a 1% HCl solution to modify the surface morphology. After wet-etching for the as-deposited ZnO:Al films without ITO films, the diffuse transmittance of the ZnO:Al films without ITO films deposited up to 100 °C was enhanced by the rough surfaces, accompanied by an abrupt increase in the sheet resistance to approximately 300 Ω/square due to the reduction in film thickness. The  orientation of the ZnO:Al films deposited on the ITO films with various crystalline orientations decreased significantly compared with the strong  preferred orientation of the ZnO:Al films deposited without the ITO films. For the textured ZnO:Al/ITO bilayers, a low sheet resistance below 10 Ω/square was obtained, and the light-scattering properties of these bilayers of 400-1100 nm were superior to those of the Asahi U glass that has been widely used as a transparent conducting electrode in thin-film solar cells. The material properties of the as-deposited and textured ZnO:Al/ITO bilayers with and without ITO films were systematically investigated.
|Number of pages||6|
|Journal||Solid State Sciences|
|Publication status||Published - 2014 May|
Bibliographical noteFunding Information:
This work was supported by the Global Frontier R&D Program on Center for Multiscale Energy System funded by the National Research Foundation under the Ministry of Science, ICT & Future, Korea ( 2011-0031578 ). This work was also conducted under the framework of Research and Development Program of the Korea Institute of Energy Research (KIER) (B4-2421-02).
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics