Vibrational relaxation dynamics in layered perovskite quantum wells

Journal Article · 15 June 2021 · Proceedings of the National Academy of Sciences of the United States of America

DOI: https://doi.org/10.1073/pnas.2104425118 · OSTI ID:1788306

Quan, Li Na ^[1]; Park, Yoonjae  ^[2]; Guo, Peijun ^[3]; Gao, Mengyu  ^[4]; Jin, Jianbo  ^[2]; Huang, Jianmei ^[2]; Copper, Jason K. ^[5]; Schwartzberg, Adam ^[6]; Schaller, Richard ^[7]; Limmer, David T.  ^[8]; Yang, Peidong ^[9]

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1. Department of Chemistry, University of California, Berkeley, CA 94720,, Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,, Department of Chemistry, Virginia Tech, Blacksburg, VA 24061,
2. Department of Chemistry, University of California, Berkeley, CA 94720,
3. Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL 60439,
4. Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,, Department of Materials Science and Engineering, University of California, Berkeley, CA 94720,
5. Chemical Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,
6. Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,
7. Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL 60439,, Department of Chemistry, Northwestern University, Evanston, IL 60208,
8. Department of Chemistry, University of California, Berkeley, CA 94720,, Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,, Chemical Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,, Kavli Energy NanoScience Institute, Berkeley, CA 94720
9. Department of Chemistry, University of California, Berkeley, CA 94720,, Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,, Department of Materials Science and Engineering, University of California, Berkeley, CA 94720,, Chemical Science Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,, Kavli Energy NanoScience Institute, Berkeley, CA 94720

Significance Halide perovskites, especially layered perovskites, offer a number of advantages to creating bright and efficient light-emitting devices and other optoelectronic applications. The organic–inorganic hybrid layered perovskite features complex lattice dynamics due to the ionic character of the crystal and the softness arising from noncovalent bonds between molecular moieties and the inorganic network. Especially, the packing geometry of the organic barriers leads to a structural deformation of inorganic octahedral, which strongly affects the properties that are crucial for device applications. In this work, we use high-resolution resonant impulsive stimulated Raman spectroscopy of a variety of ligand substitutions in layered perovskites. We find the composition of organic ligands can substantially change the dephasing rate of optical phonons and their temperature dependence, due to varying degrees of anharmonicity in the lattice and dynamic structural disorder.

• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1788306
• Journal Information: Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 25 Vol. 118; ISSN 0027-8424
• Publisher: Proceedings of the National Academy of SciencesCopyright Statement
• Country of Publication: United States
• Language: English