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Lead halide perovskites: Crystal-liquid duality, phonon glass electron crystals, and large polaron formation

Kiyoshi Miyata; Timothy Luke Atallah; Xiaoyang Zhu

Title:
Lead halide perovskites: Crystal-liquid duality, phonon glass electron crystals, and large polaron formation
Author(s):
Miyata, Kiyoshi
Atallah, Timothy Luke
Zhu, Xiaoyang
Date:
Type:
Articles
Department(s):
Chemistry
Volume:
3
Persistent URL:
Book/Journal Title:
Science Advances
Abstract:
Lead halide perovskites have been demonstrated as high performance materials in solar cells and light-emitting devices. These materials are characterized by coherent band transport expected from crystalline semiconductors, but dielectric responses and phonon dynamics typical of liquids. This “crystal-liquid” duality implies that lead halide perovskites belong to phonon glass electron crystals, a class of materials believed to make the most efficient thermoelectrics. We show that the crystal-liquid duality and the resulting dielectric response are responsible for large polaron formation and screening of charge carriers, leading to defect tolerance, moderate charge carrier mobility, and radiative recombination properties. Large polaron formation, along with the phonon glass character, may also explain the marked reduction in hot carrier cooling rates in these materials.
Subject(s):
Metal halides
Perovskite
Chemistry
Polarons
Materials science
Publisher DOI:
https://doi.org/10.1126/sciadv.1701469
Item views
24
Metadata:
text | xml
Suggested Citation:
Kiyoshi Miyata, Timothy Luke Atallah, Xiaoyang Zhu, , Lead halide perovskites: Crystal-liquid duality, phonon glass electron crystals, and large polaron formation, Columbia University Academic Commons, .

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