Analysis of an MZO/CdTe photovoltaic device treated with cadmium bromide replacing cadmium chloride
Rachael C. Greenhalgh1, Mustafa Togay1, Tom A. M. Fiducia1, Ali Abbas1, Kexue Li3, Chris Grovener3, Adam Danielson2, Amit H. Munshi2, Kurt L. Barth2, Walajabad S. Sampath2, Vlad Kornienko1, Jake W. Bowers1, John M. Walls1
1CREST, Loughborough University, Loughborough, United Kingdom
/2NSF I/UCRC for Next Generation Photovoltaics, Colorado State University, Fort Collins, CO, United States
/3Department of Materials, Oxford, United Kingdom

The treatment of CdTe with a CdBr2 activation annealing step has been performed and the sample characterized for its electrical, compositional and structural properties. JV, CV, EQE, TEM, EDX and nano-SIMS have been used to analyze these properties. Nano-SIMS shows the bromine segregating in the grain boundaries and also in through grain defects. CV has given a doping density of 1.05x1014 cm -2 for this CdBr2 treated sample. JV shows an efficiency of 8.6 % with a Jsc of 23.7 mAcm-2 and Voc of 762 mV. 

Area: Sub-Area 2.1: Absorber Preparation and Material Properties