Experimental and Theoretical Investigations Of The Quality Factor For N + P Silicon Solar Cells

G. F. J. Garlick; A. H. Kachare

doi:10.1117/12.970583

25 November 1980 Experimental and Theoretical Investigations Of The Quality Factor For N + P Silicon Solar Cells

G. F. J. Garlick, A. H. Kachare

Proceedings Volume 0248, Role of Electro-Optics in Photovoltaic Energy Conversion; (1980) https://doi.org/10.1117/12.970583
Event: 24th Annual Technical Symposium, 1980, San Diego, United States

Abstract

Many N⁺P INJ P silicon solar cells made with silicon from different growth techniques have current-voltage relations of the form: I = I₀ [exp(qV/AkT) - 1] where the quality factor A is non-integral, is >1 and shows a temperature dependence. The dark forward characteristics of such cells have been measured over a range of temperatures and the behavior of the factor A derived from them. Lack of agreement with previous models has led to the development of a new model in which N⁺ conduction electrons tunnel to deep levels near that side, these levels being due to junction contamination by impurities. Electron recombination then occurs with holes thermally assisted into the junction from the P side. This mechanism involves increased I₀ values over those for diffusion diode processes and thus reduces the cell power conversion efficiency.

Citation Download Citation

G. F. J. Garlick and A. H. Kachare "Experimental and Theoretical Investigations Of The Quality Factor For N + P Silicon Solar Cells", Proc. SPIE 0248, Role of Electro-Optics in Photovoltaic Energy Conversion, (25 November 1980); https://doi.org/10.1117/12.970583

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