Photovoltaic Systems Engineering SEC598 Photovoltaic Systems Engineering (SEC501 Solar Engineering and Commercialization, I) Session 06 Solar Cells, part 2 September 05, 2017

Session 06 Components PV System Components Solar cell fabrication Solar cell operation Solar cell electrical characterization

The Doping Model Pierret

The Doping Model, cont. Pierret

The Fermi Level (or, the chemical potential) Pierret

The PN Junction Nelson

The PN Junction, cont. Neudeck

Electrical “carriers” in the PN-Junction Neudeck

Electrical “carriers” in the PN-Junction, cont. Neudeck

Electrical “carriers” in the PN-Junction, cont. Neudeck

The Shockley Equation Neudeck

Now add photons to the system Nelson

Equivalent circuit of the ideal solar cell Nelson

Current and Voltage in the Solar Cell nosleN

Resources Jenny Nelson, The Physics of Solar Cells, Imperial College Press, 2003 Robert F. Pierret, Semiconductor Fundamentals, V.1., Modular Series on Solid State Devices, Addison-Wesley, 1988 Gerold W. Neudeck, The PN Junction Diode, V.2., Modular Series on Solid State Devices, Addison-Wesley, 1989