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- aggregation classification "A1".
- aggregation creator B224516.
- aggregation creator B224517.
- aggregation creator B224518.
- aggregation creator person.
- aggregation creator person.
- aggregation date "2013".
- aggregation format "application/pdf".
- aggregation hasFormat 3153834.bibtex.
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- aggregation isPartOf urn:issn:0022-3727.
- aggregation language "eng".
- aggregation rights "I have transferred the copyright for this publication to the publisher".
- aggregation subject "Physics and Astronomy".
- aggregation title "On the diffusion length and grain size homogeneity requirements for efficient thin-film polycrystalline silicon solar cells".
- aggregation abstract "We examine the influence of intragrain defects and grain boundaries on the macroscopic performance of a thin film polycrystalline silicon solar cell. In addition, we evaluate the effect of grain size inhomogeneity on the cell performance via circuit simulations. From an analytical study of charge transport in individual grains and homogeneous grain systems, we obtain the grain size and intragrain diffusion length requirements for a desired efficiency. We identify the conditions under which the grain size and the intragrain diffusion length dominate the cell characteristics. In devices with intragrain effective diffusion length L-mono <= 100 mu m and grain boundary recombination velocity S-GB <= 10(4) cm s(-1), achieving a larger grain size beyond several mu m is not crucial. The inhomogeneous distribution circuit simulations show that grain size inhomogeneity is not the main limiting factor in polycrystalline silicon solar cells. This is so even in thin polycrystalline silicon films with a broad grain size distribution such as those made with aluminum-induced crystallization at low annealing temperature. The main reason is that the optimum bias point for grains of different sizes only differ by about similar to 50 mV over a fairly wide grain diameter range 0.5-50 mu m even when L-mono = 100 mu m and S-GB = 10(5) cm s(-1).".
- aggregation authorList BK491613.
- aggregation issue "4".
- aggregation volume "46".
- aggregation aggregates 3153835.
- aggregation isDescribedBy 3153834.
- aggregation similarTo 045105.
- aggregation similarTo LU-3153834.