Photoeffects at Semiconductor Surfaces

Improved isoprene detection performance of Si-doped WO3 films deposited by sputtering and post-annealing

“…In fact, such a curve shape is reminiscent of the plot of adsorbate density vs. temperature, where the upward and downward turning regions in the curve are correlated with the transition from equilibrium physisorption to irreversible chemisorption. 42,43 So, the observed R–T behaviour in air may be understood as follows. The decrease in resistance from 50 °C to 250 °C (Section I of the R–T curve) is due to the deduction in physiosorbed oxygens as the temperature increases, which results in a narrower depleted layer and hence a decrease in resistance.…”