Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2020. No. 5
ContentsFull text in Russian (pdf)
DOI https://doi.org/10.30898/1684-1719.2020.5.11
UDC 681.518.3
Specificity of current distribution in solar cells during measurement thermal resistance in diode mode
V. I. Smirnov1,2, V. A. Sergeev1,2, A. A. Gavrikov1, A.A. Kulikov1,2
1Ulyanovsk branch of Kotelnikov Institute of Radio-Engineering and Electronics of Russian Academy of Science, Goncharova 48/2, Ulyanovsk 432071, Russia
2Ulyanovsk State Technical University, Severny Venets 32, Ulyanovsk, 432027, Russia
The paper is received on May 13, 2020
Abstract. Results of investigations and analysis of features of current distribution over area of solar cells (SÑ) when measuring their thermal resistance in diode mode are presented. The object of the research was SC from monocrystal silicon with dimensions of 52×52 mm2. Measurement of thermal resistance of SE fixed by means of thermopaste on massive aluminum radiator was carried out by modulation method using pulse-width modulation of heating power. The method makes it possible to determine components of thermal resistance related to features of design and propagation of heat flux in the controlled object by dependence of thermal impedance on frequency of heating power modulation. An additional component of thermal resistance was experimentally detected due to the thermal flux between the more heated local regions and the rest of the less heated part of the SÑ structure. Indirect confirmation of formation of local heating areas is a strong decrease of element thermal resistance with increase of heating current amplitude. Non-uniformity of temperature distribution on the surface of the SÑ is confirmed by measurements of thermal radiation of the object using an IR microscope.
Key words: solar cell, thermal resistance, measurement, modulation method, current distribution, local heating.
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For citation:
Smirnov V.I., Sergeev V.A., Gavrikov A.A., Kulikov A.A. Specificity of current distribution in solar cells during measurement thermal resistance in diode mode. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2020. No. 5. Available at http://jre.cplire.ru/jre/may20/11/text.pdf. DOI: https://doi.org/10.30898/1684-1719.2020.5.11