Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Pyroelectric and Piezoelectric Voltage Coefficients of Blue Luminescent Organic Lead-Free Perovskite MDABCO-NH4I3 Electrospun Nanofibers

Rosa M. F. Baptista
,
Gonçalo Moreira
,
Bruna Silva
ORCID logo ,
João Oliveira
ORCID logo ,
Bernardo Almeida
,
Cidália Castro
ORCID logo ,
Pedro V. Rodrigues
ORCID logo ,
Ana Machado
,
Michael Belsley
* ORCID logo ,
Etelvina De Matos Gomes
Version 1 : Received: 14 October 2022 / Approved: 17 October 2022 / Online: 17 October 2022 (11:51:08 CEST)

A peer-reviewed article of this Preprint also exists.

Baptista, R.M.F.; Moreira, G.; Silva, B.; Oliveira, J.; Almeida, B.; Castro, C.; Rodrigues, P.V.; Machado, A.; Belsley, M.; de Matos Gomes, E. Lead-Free MDABCO-NH4I3 Perovskite Crystals Embedded in Electrospun Nanofibers. Materials 2022, 15, 8397. Baptista, R.M.F.; Moreira, G.; Silva, B.; Oliveira, J.; Almeida, B.; Castro, C.; Rodrigues, P.V.; Machado, A.; Belsley, M.; de Matos Gomes, E. Lead-Free MDABCO-NH4I3 Perovskite Crystals Embedded in Electrospun Nanofibers. Materials 2022, 15, 8397.

Abstract

Lead-free ferroelectric perovskite N-methyl-N'-diazabicyclo[2.2.2]octonium)–ammonium triio-dide, MDABCO-NH4I3, nanocrystals are embedded in three different polymer fibers fabricated by the electrospinning technique. The nanofibers, which are very flexible and have a high Young modulus, behave as active piezoelectric energy harvesting sources that produce a piezoelectric voltage coefficient up to geff = 3.6 VmN-1 and show a blue intense luminescence band at 325 nm. In this work, the pyroelectric coefficient is reported for the MDABCO-NH4I3 perovskite inserted in electrospun fibers. At the ferroelectric-paraelectric phase transition, the embedded nanocrystals display a pyroelectric coefficient as high as 194×10-6 Cm-2k-1, within the same order of magnitude as that reported for the state-of-the-art bulk ferroelectric triglycine sulfate (TGS). The perovskite nanocrystals embedded into the polymer fibers remain stable, and no degradation is caused by oxidation.

Keywords

organic lead-free perovskites; piezoelectric crystals; nanofiber composites; electrospinning; blue luminescence; functional organic materials

Subject

Chemistry and Materials Science, Nanotechnology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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