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Organoboron donor-π-acceptor chromophores for small-molecule organic solar cells

Abstract

We introduce the use of facilely synthesizable and low-bandgap boron chromophores as donors in planar heterojunction solar cells. We show that simple changes in the compositional properties of these molecules can improve the performance of the devices. A simultaneous grafting of NO2 acceptor and N(Et2) donor groups into the molecule core causes an increase in efficiency of almost 50%. Such enhanced efficiency is mainly due to a higher photocurrent. The origin of this phenomenon is investigated.

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Acknowledgements

J.C. Nolasco is indebted to the Alexander von Humboldt Foundation for providing a George Foster Grant. A. Castro-Carranza acknowledges support from the University of Bremen and the FP7-PEOPLE-2012EU Marie-Curie Action COFUND “BREMEN TRAC”, project no. 600411, and from the National Council of Science and Technology CONACYT Mexico. The authors thank the support obtained from the projects: Ce-MieSol 207450/27, 2013-02 (México); Fondo Sectorial CONACYT-SENER-Sustentabilidad Energética 245754, 2014-02 (México); CONACyT Grant 293371 (Mexico) “Laboratorio Nacional de Materiales Grafénicos (LNMG)”, and Proyectos de Ciencia y Tecnología Aplicada en Temas de Frontera. Mónica Jenith C. Flores (Centro de Investigaciones en Óptica) is acknowledged for her technical assistance in chemical synthesis. This research is also a result of collaborative work in the framework of Redes Temáticas CONACYT: development of devices and low-cost sustainable technology.

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Nolasco, J.C., Ryan, J.W., Rodríguez, M. et al. Organoboron donor-π-acceptor chromophores for small-molecule organic solar cells. J Mater Sci: Mater Electron 29, 16410–16415 (2018). https://doi.org/10.1007/s10854-018-9732-6

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  • DOI: https://doi.org/10.1007/s10854-018-9732-6