A Model for the Open-Circuit Voltage Dependence on Temperature for Integrated Diodes

The open-circuit voltage is a key parameter determining the harvesting capabilities of diodes operating in photovoltaic regimes. It is highly dependent on temperature which may limit the diode operation in application scenarios with large temperature variations. This dependence has not been studied for diodes integrated into standard IC fabrication technologies. We present an analytical model to study the phenomenon. On one hand, it was validated with TCAD simulations within a wide operation range. On the other hand, the model was validated with experimental results with integrated diodes in two different 180 nm fabrication technologies. Results show the model qualifies to study how temperature variations affect the performance of solar cells.