Nanocrystalline ZnO Films Research Articles

Electronic Doping in Porous Nano-Crystalline ZnO Films

AbstractPorous nano-crystalline ZnO films were prepared in sol-gel technique, using spin coating and sintering at modest temperatures. The films consist of loosely-packed ZnO clusters. For films with clusters smaller than ∼ 50 Å we find a blue-shifted absorption edge indicative of quantum confinement in the clusters. The electronic properties of the films are largely controlled by surface processes. We have studied photo-induced conductance changes due to CO2 desorption using mass spectrometry and concomitant electrical measurements.

Visible Light Sensitization by cis-Bis(thiocyanato)bis(2,2'-bipyridyl-4,4'-dicarboxylato)ruthenium(II) of a Transparent Nanocrystalline ZnO Film Prepared by Sol-Gel Techniques

Reference LPI-ARTICLE-1994-002doi:10.1021/cm00041a020View record in Web of Science Record created on 2006-02-21, modified on 2017-05-12

Spectroelectrochemical Investigations of Nanocrystalline ZnO Films

AbstractTransparent nanocrystalline ZnO films were prepared from colloidal ZnO solutions containing particles of different sizes. The colloidal solution as well as the films exhibit size quantization effects. The absorption and stationary and time resolved fluorescence of the films as well as the photocurrent strongly depend on the applied potential. The electrochemical and spectroscopic investigations allow direct measurement of the quantum mechanical confinement energy for electrons in the nanocrystalline particles of the films. The optical properties and the charge carrier transport through the films are explained by a model involving electronic levels of the individual particles.