Equations of Solar Cells

This lecture covers the fundamental equations of solar cells, including the dark IV curve of infinite pn junctions, photocurrent in illuminated solar cells, the two-diode model, and the depletion approximation in the space charge region. It also discusses the electrostatic potential, band diagrams, built-in voltage, and heterojunctions. The lecture delves into semiconductor equations, continuity equations, Poisson equation, and the calculation of the dark I-V curve. It explains the effect of bias on band bending, carrier injection into quasi-neutral regions, and the calculation of the dark j(V) curve. The lecture concludes with the photocurrent in illuminated solar cells, the Shockley diode equation, and terminology related to solar cell performance.