The analysis of exponential and nonexponential transients in deep-level transient spectroscopy

Abstract

One of the major motivations for using computerized waveform capture for deep-level transient spectroscopy is the capability to employ methods of analysis more accurate and informative than boxcars and correlators. Accordingly, we have adapted the fast Fourier transform method and the method of moments to analyze single and multiple exponential decays, respectively. We present relevant details of our experimental system, and compare the boxcar method with the new analyses on both simulated and experimental data. The new analyses have given conclusive, accurate results in cases where the boxcar is ambiguous or directly misleading.