Temperature-dependent photovoltaic behavior of CdSe quantum dots/P3HT hybrid thinfilm

An organic–inorganic hybrid solar cell based on CdSe quantum dots (QDs) and poly(3-hexylthiophene) (P3HT) was fabricated. Its temperature-dependent photovoltaic behaviors, such as I–V characteristic curves and open circuit voltage (Voc) transient response, were measured. The photovoltaic behavior of this hybrid thin film device was similar with that of organic thin film solar cells, according to analysis results based on the equivalent circuit method. The exact carrier lifetime was remarkably different between under low-temperature region and under temperature above 197 K.

► The temperature-dependent photovoltage and open-circuit voltage decay are measured. ► The photovoltaic mechanism of a CdSe QDs/P3HT hybrid solar cell is discussed. ► With the increase of temperature, the short-circuit current and open-circuit voltage are raised. ► With the increase of temperature, the series resistance and shunt resistance are reduced. ► The exact carrier lifetime is different between high (>177 K) and low temperature region.