Organic-inorganic lead halide perovskite nanowires: formation mechanism and optoelectronic applications

Endre Horváth^a, Massimo Spina^a, Bálint Náfrádi^a, Eric Bonvin^a, Márton Kollár^a, Andrzej Sienkievicz^a, Anastasiia Glushkova^a, Alla Arakcheeva^a, Zsolt Szekrényes^b, Hajnalka Tóháti^b, Katalin Kamarás^b, Richard Gaal^c, László Forró^a

^aInstitute of Physics (IPHYS), EPFL Ecole Polytechnique Federale de Lausanne, Switzerland, Station, Lausana, Switzerland

^bWigner Research Centre for Physics, 1525, Budapest

^cInstitute of Physics (IPHYS), EPFL Ecole Polytechnique Federale de Lausanne, Switzerland, Station, Lausana, Switzerland

International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)

Benidorm, Spain, 2018 May 28th - 31st

Organizers: Emilio Palomares and Rene Janssen

Oral, Endre Horváth, presentation 147
Publication date: 21st February 2018

In this talk a common mechanism underlying of hybrid perovskite nanowire formation will be discussed in detail [1]. The central role of the solvatomorph phase as the intermediate phase in crystallization will be highlighted. Next, our latest findings on the guided growth of perovskite nanowires by ‘solvatomorph-graphoepitaxy’ will be presented [2]. This method turned out to be a fairly simple approach to overcome the spatially random surface nucleation. The process allows the synthesis of extremely long (centimeters) and thin (a few nanometers) nanowires with a morphology defined by the shape of nanostructured open fluidic channels. This method might allow the integration of perovskites into advanced CMOS technologies.

CH₃NH₃PbI₃ nanowires in association with carbon nanostructures (carbon nanotubes and graphene) make outstanding composites with rapid and strong photoresponse. They can serve as conducting electrodes, or as central components of detectors. Performance of several miniature photo-field effect transistor devices based on these composite structures will be demonstrated.

Solvatomorph-graphoepitaxy method could open up an entirely new spectrum of architectural designs of organometal-halide-perovskite-based heterojunctions -and tandem solar cells, LEDs, photodetectors and new type of magneto-optical data storage devices [5].

References :

[1] Horváth et al. Nano Letters, 2014, 14 (12), 6761–6766

[2] Spina et al. Scientific Reports, 2016, 6

[3] Spina et al. Small, 2015, 11, 4824-4828

[4] Spina et al. Nanoscale, 2016, 8, 4888

[5] Náfrádi et al. Nature Communications 7, 13406

Acknowledgement:

This work was supported by the ERC Advanced Grant (PICOPROP#670918) and the Swiss National Foundation (No.513733).

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