Fast Lead-Free Humidity Sensor Based on Hybrid Halide Perovskite
Artikel i vetenskaplig tidskrift, 2022

An environmentally friendly analog of the prominent methylammonium lead halide perovskite, methylammonium bismuth bromide (MA(3)Bi(2)Br(9)), was prepared and investigated in the form of powder, single crystals and nanowires. Complete characterization via synchrotron X-ray diffraction data showed that the bulk crystal does not incorporate water into the structure. At the same time, water is absorbed on the surface of the crystal, and this modification leads to the changes in the resistivity of the material, thus making MA(3)Bi(2)Br(9) an excellent candidate for use as a humidity sensor. The novel sensor was prepared from powder-pressed pellets with attached carbon electrodes and was characterized by being able to detect relative humidity over the full range (0.7-96% RH) at ambient temperature. Compared to commercial and literature values, the response and recovery times are very fast (down to 1.5 s/1.5 s).

fast response

humidity sensor

lead-free

perovskite

environmentally friendly

Författare

Veljko Djokic

Ecole Polytechnique Federale de Lausanne (EPFL)

Univerzitet u Beogradu

Pavao Andricevic

Danmarks Tekniske Universitet (DTU)

Ecole Polytechnique Federale de Lausanne (EPFL)

Marton Kollar

Ecole Polytechnique Federale de Lausanne (EPFL)

Anastasiia Ciers

Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi

Ecole Polytechnique Federale de Lausanne (EPFL)

Alla Arakcheeva

Ecole Polytechnique Federale de Lausanne (EPFL)

Milica Vasiljevic

Ecole Polytechnique Federale de Lausanne (EPFL)

Dragan Damjanovic

Ecole Polytechnique Federale de Lausanne (EPFL)

Laszlo Forro

Ecole Polytechnique Federale de Lausanne (EPFL)

University of Notre Dame

Endre Horvath

Ecole Polytechnique Federale de Lausanne (EPFL)

Trpimir Ivsic

Technische Universität Wien

Ecole Polytechnique Federale de Lausanne (EPFL)

Crystals

2073-4352 (ISSN)

Vol. 12 4 547

Ämneskategorier

Materialteknik

Materialkemi

DOI

10.3390/cryst12040547

Mer information

Senast uppdaterat

2022-05-05