Systems and Methods of Preparation of Photovoltaic Films and Devices

摘要

Described herein are processes and apparatuses for preparation and optimization of photovoltaic films and film stacks with application of electrical pulses. The process achieves high photovoltaic efficiency upon application of conditioning electrical pulses to the stack or layers of deposited photovoltaic films. This may be done at manufacture, or in the field at certain time intervals. The films of photovoltaic devices may be optimized by application of programmed voltage pulses. Furthermore, it is possible to deliver larger portion of energy from the pulse to a particular layer of a multi-stack film by rendering one or more layers of the film relatively more conductive using exposure to selected narrow wavelength of light corresponding to the band gap of the particular layer.