Jump to main content
Jump to site search

Issue 46, 2014
Previous Article Next Article

Low-temperature crystal growth of aluminium-doped zinc oxide nanoparticles in a melted viscous liquid of alkylammonium nitrates for fabrication of their transparent crystal films

Author affiliations

Abstract

We fabricated conductive Al-doped ZnO (AZO) films on glass substrates via a simple drop-coating process of alcoholic dispersion solutions of AZO nanoparticles less than 10 nm in size, which were prepared by hydrolysis reactions of Zn(NO3)2·6H2O and Al(NO3)3·9H2O with an excess amount of isopropylamine. After heating at 150 °C to completely remove the alcoholic solvents, a by-product that remained, isopropylammonium nitrate, was melted and functioned as a low-temperature medium for the AZO nanoparticles. Even in the low-temperature medium at 150 °C, the AZO nanoparticles could readily grow up to ~100 nm, based on Ostwald ripening as a plausible crystal growth mechanism. The medium was evaporated at 240 °C, and a highly transparent AZO film appeared on the glass with a transmittance of ~83% in the visible region. The electrical conductivity of the AZO films was improved by sintering at 450 °C and post-annealing at 450 °C in a stream of a mixed gas of N2 and H2. The resistivity of the AZO film reached 4.3 × 10−2 Ω cm in an Al/Zn molar ratio of 2.0%.

Graphical abstract: Low-temperature crystal growth of aluminium-doped zinc oxide nanoparticles in a melted viscous liquid of alkylammonium nitrates for fabrication of their transparent crystal films

Back to tab navigation

Supplementary files

Article information


Submitted
01 Jul 2014
Accepted
21 Aug 2014
First published
22 Aug 2014

CrystEngComm, 2014,16, 10539-10546
Article type
Paper
Author version available

Low-temperature crystal growth of aluminium-doped zinc oxide nanoparticles in a melted viscous liquid of alkylammonium nitrates for fabrication of their transparent crystal films

H. Kaneko, T. Togashi, T. Naka, M. Ishizaki, K. Kanaizuka, M. Sakamoto and M. Kurihara, CrystEngComm, 2014, 16, 10539
DOI: 10.1039/C4CE01336K

Social activity

Search articles by author

Spotlight

Advertisements