| Summary: | abstract Photovoltaic (PV) devices that capture the energy provided by the sun have great potential as renewable energy sources. However, the input parameters such as the luminous intensity and temperature of the solar cells tend to influence the operating characteristics in the solar panels. The inherent physical processes that cannot be altered limit the efficiency of photovoltaic cells, as well as temperatures above the ideal value of operation. We propose a diode model to represent a PV cell, presenting good approximation for a commercial silicon cell. In this work we report the model with the aid of Coughey Thoma's equation to obtain the results, which indicate decrease in the mobility of loads and subsequently evaluation in terms of the load carrier diffusion lengths in regions with ideal temperatures between 293.15 K to 301.15 K (20 °C and 28 °C). Results were compared with local temperature between 298.15 K at 308.15 K (25 °C and 35 °C), in a region with a PV plant in operation in the West of Bahia.
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