In the recent years, photoluminescence based characterisation techniques have been widely adopted in photovoltaics.This has led to further research into the various aspects of photoluminescence characterisation. One aspect of such characterisation is the illumination wavelength dependence of the photoluminescence emission from a sample. This is the main focus of this talk. The illumination wavelength dependence of a solar cell is important as it is designed to operate under a broad spectrum of the sun. The standard metric used to quantify the performance of a device as a function of illumination wavelength is the external quantum efficiency, which requires contact to be made to the sample. It has been shown that this metric can be determined from measurement of the spectral response of photoluminescence. The talk shows results from a PhD project which investigated the application of photoluminescence techniques to characterise the spectral response of a solar cell in a contactless way. Spectral response of photoluminescence was shown to be useful in quantifying the carrier movement between different silicon layers in the front side of a heterojunction solar cell.
Appu Paduthol is a PhD candidate at University of New South Wales (UNSW), Sydney. He received Bachelors and Masters degree in Energy Engineering from Indian Institute of Technology Bombay (IITB) in 2013. He joined UNSW in 2015 as a PhD Candidate and has been working on characterizing solar cells by contactless measurement of spectral response using photoluminescence. His work was recognized with PVSEC student award for outstanding research in 2017. He has currently submitted his thesis on this topic.