Lead Halide Perovskite Nanowires: Quest for Liquid Phase Wafer-scale Epitaxial Growth
Endre Horvath a d, Massimo Spina a, Balint Nafradi a, Eric Bonvin a, Marton Kollar a, Andrzej Sienkiewicz a, Konstantins Matulnikovs a, Anastasiia Glushkova a, Alla Arakcheeva a, Zsolt Szekrenyes b, Hajnalka Tohati b, Katalin Kamaras b, Richard Gaal c, Pavao Andricevic a, Rita Smajda d, Raphael Pugin d, Laszlo Forro a
a EPFL SB IPHYS LPMC
b Wigner Research Centre for Physics
c EPFL SB IPHYS EPSL
d CSEM SA, Tramstrasse 99, Muttenz, 4132, Switzerland
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV19)
Roma, Italy, 2019 May 12th - 15th
Organizers: Prashant Kamat, Filippo De Angelis and Aldo Di Carlo
Oral, Endre Horvath, presentation 129
Publication date: 11th February 2019

Understanding the crystallization is one of the most pressing task in order to make the halide perovskite based technologies reproducible and reliable. In this work 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. 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 surface features, for example open fluidic channels. This method might allow the integration of perovskite nanowires into advanced CMOS technologies. Along this road, our latest findings on ink-jet printed perovskite nanowire films and the performances of printed sensitive photodetector will be discussed.

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].

 

This work was supported by the ERC Advanced Grant (PICOPROP#670918).

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