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Evaluation of the minority carrier diffusion length by means of electron beam induced current and Monte Carlo simulation in AlGaAs and GaAs p-i-n solar cells

E Grunbaum, E Napchan, Z Barkay, K Barnham, J Nelson, C T Foxon, J S Roberts and D B Holt

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A new method of determining the minority carrier diffusion length in multilayer solar cells is described. Electron beam-induced current (EBIC) gain measurements, performed in a scanning electron microscope in the planar sample configuration, are compared with values obtained by calculations using a Monte Carlo simulation program of electron trajectories. Values for diffusion lengths obtained by this method from five AlGaAs and GaAs p-i-n and p-n solar cells are compared with values given in the literature.


PACS

84.60.Jt Photoelectric conversion: solar cells and arrays

68.37.Hk Scanning electron microscopy (SEM) (including EBIC)

85.60.Bt Optoelectronic device characterization, design, and modeling

Subjects

Electronics and devices

Surfaces, interfaces and thin films

Optics, quantum optics and lasers

Dates

Issue 5 (May 1995)



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