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Temperature behaviour of the spectral response: a new approach for silicon solar cell characterization♣

Z. NENOVA1,* , P. VITANOV1, ST. KANEV1

Affiliation

  1. Central Laboratory for Solar Energy and New Energy Sources, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria

Abstract

The paper explores the possibility of measuring the temperature behaviour of the spectral response of the open-circuit voltage Voc, as a tool for silicon solar cell characterization. A characteristic decrease of Voc with temperature is observed at fixed values of the wavelength λ, but for varying λ the slope of lg[V oc(1/T)] differs. Using an activation law, the activation energy E a has been determined at constant photon flux, for wavelengths in the range 420−1200 nm. Two regions with different slopes of the dependence Ea (λ) are observed. The nature of E a change with λ can be related to a widening of the “active generation region” in the solar cell..

Keywords

Si solar cells, Spectral response, Activation energy.

Submitted at: Nov. 5, 2008
Accepted at: Oct. 3, 2009

Citation

Z. NENOVA, P. VITANOV, ST. KANEV, Temperature behaviour of the spectral response: a new approach for silicon solar cell characterization♣, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 10, pp. 1487-1489 (2009)