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Double-sided n+-p-n+ solar cell for bifacial concentration

✍ Scribed by A. Luque; A. Cuevas; J.M. Ruiz

Publisher
Elsevier Science
Year
1980
Weight
827 KB
Volume
2
Category
Article
ISSN
0379-6787

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✦ Synopsis

The concentration gain that can be achieved with static concentrators is maximum if bifacial cells are used; it is twice the concentration gain of conventional cells.

A theoretical and experimental analysis of the properties of an nΓ·-p-n Γ· transistor-like structure called Transcell is presented. In this cell the quantum collection efficiency is enhanced by the collection in the rear junction. The series resistance is increased because of the lateral flow of the current in the base. A new two-dimensional model which allows us to calculate the series resistance and the fill factor is experimentally verified. The model enables us to design optimum metallization grid patterns which reduce the effect of the series resistance to acceptable levels. A curve factor of 0.77 at 5 air mass one suns and 28 Β°C was measured in the experimental cells. Potential improvements which could be made to Transcells are summarized.

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