Self-consistent calibration of photoluminescence and photoconductance lifetime measurements

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Abstract
An experimental method is introduced by which relative photoluminescence or photoconductance signals can be converted into an absolute excess carrier concentration. This method is demonstrated by comparison of self-consistently calibrated quasi-steady-state photoluminescence measurements with transient photoluminescence and with transient and quasi-steady-state photoconductance measurements on silicon samples. The method simplifies photoluminescence lifetime measurements and the recently introduced Suns-photoluminescence technique as it allows these techniques to be used in a self-contained way, without the previous requirement for a separate experimental technique for calibration. Important experimental observations regarding photoconductance lifetime measurements are also discussed.