Light and Temperature Stability of Fully Transparent ZnO-Based Inverter Circuits

The stability of the figures of merit of transparent inverter circuits at temperatures up to 150
$^{\circ}\hbox{C}$
and under illumination by light in the visible spectral range is investigated. The inverter circuits consist of two transparent metal–semiconductor field-effect transistors. For temperatures up to 150
$^{\circ}\hbox{C}$
, the inverters remain operational; the gate electrode degradation affects the voltage transfer characteristic (VTC) for temperatures above 90
$^{\circ}\hbox{C}$
. Except for blue light, which slightly alters the VTC, visible light does not influence the device operation.