Emitter saturation current densities determined by self-consistent calibration: Impact of laterally non-uniform lifetime distribution on calibration accuracy

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Abstract

The impact of laterally non-uniform carrier lifetime on the determination of the emitter saturation current(Joe) from photoconductance-based measurements, based on the self-consistent method proposed by Trupke and Bardos, is investigated using a model assuming two adjacent regions with considerably difference Joe. It is shown that the method can result in an underestimation of the mean Joe if the distribution of the J oe across the sensed area is not uniform. From simulation it is verified that the error can be eliminated through independent measurement of the sample optical properties. The self-consistent calibration mechanism is also studied by the model. Experimental measurements confirm the model predictions. © 2013 The Authors.

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Liang, W., Weber, K. J., Walter, D., & Ratcliff, T. (2013). Emitter saturation current densities determined by self-consistent calibration: Impact of laterally non-uniform lifetime distribution on calibration accuracy. In Energy Procedia (Vol. 38, pp. 114–123). Elsevier Ltd. https://doi.org/10.1016/j.egypro.2013.07.257

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