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How do photovoltaic cell readings vary with temperature? 

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Photovoltaic cell readings vary with temperature. As the temperature increases, the open-circuit voltage decreases while the short-circuit current increases . This behavior can be explained by the band theory of solid-state physics, where the increasing temperature causes a narrowing of the forbidden gap and a shift of the Fermi energy level towards the center of the forbidden gap. These effects lead to a reduction of the potential barrier in the band diagram of the illuminated PN junction, resulting in a decrease in photovoltaic voltage. Additionally, the narrowing of the forbidden gap leads to a higher generation of electron-hole pairs in the illuminated PN junction, causing an increase in short-circuit current . The efficiency of PV energy conversion also decreases with increasing temperature .

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The paper states that an increase of 5 °C decreases the power output of a solar cell by 2%, while an increase of 20°C decreases the power output by 10.4%.
The paper states that the power output of a solar cell decreases by 2% with a temperature rise of 5 °C and decreases by 10.4% with a temperature increase of 20°C.
The open-circuit voltage of photovoltaic cells decreases and the short-circuit current increases with increasing temperature, resulting in a decrease in the efficiency of PV energy conversion.
The open-circuit voltage of photovoltaic cells decreases and the short-circuit current increases with higher temperatures. This is due to the narrowing of the forbidden gap and a shift in the Fermi energy level.
Proceedings ArticleDOI
C. Santhi Durganjali, Radhika Sudha 
01 Oct 2019
2 Citations
The paper states that the maximum power output and voltage at open circuit (Voc) decrease with an increase in temperature, while the current at short circuit (Isc) increases.

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