Stability characteristics, short-circuit

Here we will consider mainly the short-circuit current (SCC) output stability characteristics of both small grain, thin film CdSe and Cd(Se,Te)-based PEC s as well as those of single crystal CdSe-based cells, wh are different crystal faces are exposed to the solution, after they have undergone any of a series of surface treatments. These studies show a strong dependence of the output stability on solution composition, on real electrode surface area, on surface treatment, on crystal face and on crystal structure (for the Cd(Se,Te) alloys) (1,2 7). 

To monitor changes in SAW propagation characteristics, an oscillator loop is often utilized (10 8). In this circuit, the SAW device serves as the frequency-control element and frequency changes are proportional to SAW velocity shifts attenuation changes are proportional to changes in insertion loss (38). The devices used in this work cause loop oscillation at approximately 100 MHz short-term (several seconds) frequency stability of 1 Hz is typical (39). TTius, a frequency change of 1 part in 10 ,... 

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