Remarkably Weak Anisotropy in Thermal Conductivity of Two-Dimensional Hybrid Perovskite Butylammonium Lead Iodide Crystals | Zendy

Chen Li | Zendy; Hao Ma | Zendy; Tianyang Li | Zendy; Jinghang Dai | Zendy; Md Abu Jafar Rasel | Zendy; Alessandro Mattoni | Zendy; Ahmet Alatas | Zendy; Malcolm G. Thomas | Zendy; Zachary W. Rouse | Zendy; Avi Shragai | Zendy; Shefford P. Baker | Zendy; B. J. Ramshaw | Zendy; Joseph P. Feser | Zendy; David B. Mitzi | Zendy; Zhiting Tian | Zendy

Open Access

Remarkably Weak Anisotropy in Thermal Conductivity of Two-Dimensional Hybrid Perovskite Butylammonium Lead Iodide Crystals

Author(s) -

Chen Li,

Hao Ma,

Tianyang Li,

Jinghang Dai,

Md Abu Jafar Rasel,

Alessandro Mattoni,

Ahmet Alatas,

Malcolm G. Thomas,

Zachary W. Rouse,

Avi Shragai,

Shefford P. Baker,

B. J. Ramshaw,

Joseph P. Feser,

David B. Mitzi,

Zhiting Tian

Publication year - 2021

Publication title -

nano letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 4.853

H-Index - 488

eISSN - 1530-6992

pISSN - 1530-6984

DOI - 10.1021/acs.nanolett.0c04550

Subject(s) - thermal conductivity , anisotropy , perovskite (structure) , phonon , materials science , thermoelectric effect , iodide , conductivity , thermal , condensed matter physics , nanotechnology , crystallography , chemistry , optics , inorganic chemistry , composite material , physics , meteorology , thermodynamics

Two-dimensional (2D) hybrid organic-inorganic perovskites consisting of alternating organic and inorganic layers are a new class of layered structures. They have attracted increasing interest for photovoltaic, optoelectronic, and thermoelectric applications, where knowing their thermal transport properties is critical. We carry out both experimental and computational studies on thermal transport properties of 2D butylammonium lead iodide crystals and find their thermal conductivity is ultralow (below 0.3 W m -1 K -1 ) with very weak anisotropy (around 1.5) among layered crystals. Further analysis reveals that the unique structure with the preferential alignment of organic chains and complicated energy landscape leads to moderately smaller phonon lifetimes in the out-of-plane direction and comparable phonon group velocities in in-plane and out-of-plane directions. These new findings may guide the future design of novel hybrid materials with desired thermal conductivity for various applications.

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