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Spectral calibration of a LED–based solar simulator – a theoretical approach

A. GEORGESCU1,* , M. A. GÎRŢU1, V. CIUPINĂ1

Affiliation

  1. Department of Physics, Ovidius University of Constanţa,Constanţa, 900527, Romania

Abstract

The large number of solar cells efficiency reports without the proper care regarding the accuracy and reproducibility of the results are suggesting that class A solar simulators should be compulsory devices in any laboratory involved in solar cells production and testing. This paper synthesizes the study of the fabrication possibilities of a LED – based solar simulator, focusing on the task of obtaining a calculated spectral distribution that is closely matched to that of the Sun. In the first part of the paper, a numerical approach has been used to determine the LEDs central wavelengths and relative intensities, so that their cumulated spectrum can follow the Solar one to certain degrees of precision, using both the distribution as defined in the ASTM E927-05 Standard and the measured solar spectrum as a calibration reference. The second section offers the proof that the required LEDs can be fabricated, by determining the necessary semiconductor materials and calculating their concentrations according to the required wavelength..

Keywords

LED, Solar Simulator.

Submitted at: Sept. 25, 2012
Accepted at: Feb. 20, 2013

Citation

A. GEORGESCU, M. A. GÎRŢU, V. CIUPINĂ, Spectral calibration of a LED–based solar simulator – a theoretical approach, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 1-2, pp. 31-36 (2013)