Which of the following statements is not true about the...

Which of the following statements is not true about the output of PV cells when the temperature increases, and the other conditions remain the same?
(a) The output power decreases.
(b) The output current decreases.
(c) The output voltage decreases.
(d) The output current increases.

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Key Concepts

Temperature Coefficient of Electrical Parameters

The temperature coefficient quantifies how sensitive a photovoltaic cell’s voltage and current are to changes in temperature. Generally, the coefficient for voltage is negative, meaning that the voltage decreases with rising temperature. Conversely, the coefficient for current is usually positive or close to neutral, indicating that while current can slightly increase with temperature, the effect is much less pronounced than that on voltage.

PV Cell Performance

The performance of a photovoltaic (PV) cell is defined by its electrical output parameters such as voltage, current, and power. These parameters are highly sensitive to operating conditions, including temperature, irradiance, and load characteristics. An increase in temperature generally influences the balance between the cell's voltage and current, thereby affecting overall power output.

Semiconductor Temperature Effects

Semiconductors’ properties are temperature dependent. In PV cells, rising temperature typically leads to a reduced band gap, which in turn decreases the junction voltage over time. While the current may increase slightly due to enhanced carrier generation, the drop in voltage is usually more significant, leading to an overall reduction in power output.

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