Experimental Analysis of the Light Wavelength’s Impact on the Performance of a Silicon Solar Cell

Catarina Pinho Correia Valério Bernardo, Ricardo A. Marques Lameirinhas (), João Paulo N. Torres, António Baptista and Maria João Marques Martins
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Catarina Pinho Correia Valério Bernardo: Department of Electrical and Computer Engineering, Instituto Superior Técnico, 1049-001 Lisbon, Portugal
Ricardo A. Marques Lameirinhas: Department of Electrical and Computer Engineering, Instituto Superior Técnico, 1049-001 Lisbon, Portugal
João Paulo N. Torres: Instituto de Telecomunicações, 1049-001 Lisbon, Portugal
António Baptista: Department of Electrical and Computer Engineering, Instituto Superior Técnico, 1049-001 Lisbon, Portugal
Maria João Marques Martins: Academia Militar/CINAMIL, Av. Conde Castro Guimarães, 2720-113 Amadora, Portugal

Energies, 2024, vol. 17, issue 9, 1-20

Abstract: The main aim of this article is to analyse the Si solar cell’s behaviour when it is exposed to light of different colours. An experimental work, with 100 experimental tests, was carried out, using an RGB LED. In order to obtain better fitting of the characteristic curves’ results, we used a novel discrete model, d1MxP. The obtained results showed that all experimental points of the tests were inside the two triangles that connected the three theoretical primary colours and the three experimental primary colours in the chromaticity diagram. With this diagram, the colour purity could be determined, which presented values between 20% and 60%. The primary colours of the three different LEDs of the light source presented a dominant wavelength that corresponded to the peak wavelengths of the light source spectrum, which showed high purity. However, the obtained results show that mixing colours may not lead to an increase in the cell’s output power. Additionally, an increase in the cell’s temperature was observed, due to the surplus absorbed energy, which was converted into heat, being one of the causes of the cell’s efficiency reduction.

Keywords: colourimetry; d1MxP; optics; optoelectronics; photovoltaic technology; solar cell; solar energy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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