Low-dimensional hybrid organic–inorganic metal halide perovskites are rapidly emerging as a fascinating sub-class of the three-dimensional parent structures, thanks to their appealing charge and thermal transport properties, paired to better chemical and thermal stabilities. Extensive investigations of the thermal behavior in these systems are of paramount relevance to understand their optoelectronic and thermoelectric applications. Herein, we present a complete thermophysical characterization of imidazolium lead iodide, (IMI)PbI3, a 1D pseudo-perovskite with chains of face-sharing octahedra, and histammonium lead iodide, (HIST)PbI4, a 2D layered perovskite with corner-sharing octahedra. Upon heating, the two compounds show highly anisotropic thermal expansion effects and high thermal stability until 250–300 °C. The thermal diffusivity of pelletized powders was measured with the laser flash technique from room temperature up to 225 °C. To account for the reduced density of the pelletized powders with respect to the bulk, the diffusivity data in different atmospheres were modeled as a function of the volume fraction and dimensionality of the pores, allowing to extrapolate the thermal conductivity of the bulk materials. The two compounds exhibit an ultralow thermal conductivity of 0.15 W/m K, two to three times lower than that reported on 3D MAPbI3 using the same technique. This finding suggests the primary role of the organic molecules within the hybrid systems, regardless of the octahedra connectivity and dimensionality.
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6 September 2021
Research Article|
September 08 2021
Ultralow thermal conductivity in 1D and 2D imidazolium-based lead halide perovskites
Candida Pipitone
;
Candida Pipitone
1
Dipartimento di Fisica e Chimica “Emilio Segrè,” Università di Palermo
, viale delle Scienze, 90128 Palermo, Italy
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Stefano Boldrini
;
Stefano Boldrini
2
Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE), National Research Council (CNR)
, Corso Stati Uniti 4, 35127 Padova, Italy
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Alberto Ferrario
;
Alberto Ferrario
2
Institute of Condensed Matter Chemistry and Technologies for Energy (ICMATE), National Research Council (CNR)
, Corso Stati Uniti 4, 35127 Padova, Italy
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Gonzalo Garcìa-Espejo
;
Gonzalo Garcìa-Espejo
3
Dipartimento di Scienza e Alta Tecnologia & To.Sca.Lab., Università dell'Insubria
, via Valleggio 11, 22100 Como, Italy
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Antonietta Guagliardi
;
Antonietta Guagliardi
4
Istituto di Cristallografia & To.Sca.Lab., Consiglio Nazionale delle Ricerche
, via Valleggio 11, 22100 Como, Italy
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Norberto Masciocchi
;
Norberto Masciocchi
3
Dipartimento di Scienza e Alta Tecnologia & To.Sca.Lab., Università dell'Insubria
, via Valleggio 11, 22100 Como, Italy
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Antonino Martorana
;
Antonino Martorana
1
Dipartimento di Fisica e Chimica “Emilio Segrè,” Università di Palermo
, viale delle Scienze, 90128 Palermo, Italy
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Francesco Giannici
Francesco Giannici
a)
1
Dipartimento di Fisica e Chimica “Emilio Segrè,” Università di Palermo
, viale delle Scienze, 90128 Palermo, Italy
a)Author to whom correspondence should be addressed: francesco.giannici@unipa.it
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a)Author to whom correspondence should be addressed: francesco.giannici@unipa.it
Note: This paper is part of the APL Special Collection on New Solution-processed Perovskites and Perovskite-inspired Optoelectronic Materials and Devices.
Appl. Phys. Lett. 119, 101104 (2021)
Article history
Received:
June 24 2021
Accepted:
August 24 2021
Citation
Candida Pipitone, Stefano Boldrini, Alberto Ferrario, Gonzalo Garcìa-Espejo, Antonietta Guagliardi, Norberto Masciocchi, Antonino Martorana, Francesco Giannici; Ultralow thermal conductivity in 1D and 2D imidazolium-based lead halide perovskites. Appl. Phys. Lett. 6 September 2021; 119 (10): 101104. https://doi.org/10.1063/5.0061204
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