Abstract
Open circuit voltage is an essential factor to judge the performance of the photovoltaic cells. Basically, the photo-electrochemical (PEC) measurement shows the solid/electrolyte chemical interaction under light illumination. The PEC measurement reflects the electrical and optical properties of the semiconductors. The optical sensitivity of a semiconductor is used to derive an equation. In the present study, we introduced an equation to estimate the open circuit voltage of a pn junction from the PEC measurements of the individual layers.
