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Comparing the potential of different strategies for colour tuning in thin film photovoltaic technologies

AuthorsPascual San Jose, Enrique; Sánchez Díaz, Antonio; Stella, Marco; Martínez Ferrero, Eugenia; Alonso Carmona, M. Isabel ; Campoy Quiles, Mariano
KeywordsOrganic solar cells
Hybrid perovskite solar cells
Solar cell colour
Photovoltaic colour prediction
Refractive index
Issue Date3-Oct-2018
PublisherTaylor & Francis
CitationScience and Technology of Advanced Materials 19(1): 823-835 (2018)
AbstractWhile the performance of some emerging solar cell technologies is rocketing, there are other important parameters that also need to be considered for industrialization, including aesthetics, payback time or long-term stability. More specifically, aesthetical features of the solar cells play a very important role in the path towards the integration of these semi-transparent technologies into the buildings and windows of the future. In this work, we have implemented a theoretical methodology to study in depth colour tuning in polymer-based organic photovoltaic cells that uses experimentally complex refractive indices. We compare quantitatively basic interference effects (through active layer thickness), binaries with different donors and different acceptors, and ternary systems where the third component is either active or a simple dye. For hybrid perovskite solar cells, we compare the colour tuning capability of blending and alloying. Additionally, we show that the same theoretical framework can be employed for the so-called inverse problem, i.e. determining the best solar cell parameters (specific materials, donor:acceptor ratio and photoactive film thickness) that can reproduce a desired set of chromaticity coordinates.
Publisher version (URL)http://dx.doi.org/10.1080/14686996.2018.1530050
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