Berlin 2018 – scientific programme
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HL: Fachverband Halbleiterphysik
HL 13: Poster Session I
HL 13.29: Poster
Monday, March 12, 2018, 17:30–19:30, Poster B
Thin films made of Cu2ZnSnS4 nanocrystal inks for solar cells — •Karen P. Stroh, Ismael Gerardo Pérez Marín, Yasir A. Altowairqi, Marek Szablewski, and Douglas P. Halliday — Centre for Materials Physics, University of Durham, United Kingdom
Thin film solar cells based on nanocrystal inks, which make use of earth-abundant elements and may be fully printable, are a promising approach to sustainable, low-cost, and high-efficiency photovoltaic devices. The quaternary chalcogenide Cu2ZnSnS4 (CZTS) nanoparticles investigated are synthesised by a solution-based hot injection method. Being redispersed they form an ink, which is then used to deposit thin films via spin coating.
The influence of the temperature as well as the duration of the sintering process on the film properties is investigated, alongside with a characterisation of the nanocrystals used. The broader objective of the study is to enhance grain-growth and to achieve better uniformity throughout the films regarding composition, phase, and structure. This is substantial for limiting recombination losses and carrier scattering at grain boundaries and for enlarging the fraction of absorber layer material which effectively contributes to the generation of current. Opto-electronic properties, chemical composition, and structure of the synthesised nanoparticles as well as the resulting films are analysed by use of UV-visible spectroscopy, XRD, Raman, and SEM measurements.