High Layer Number (n = 1-6) 2D Ruddlesden-Popper Lead Bromide Perovskites: Nanosheets, Crystal Structure, and Optoelectronic Properties

Kristel M. Forlano, Chris R. Roy, Willa Mihalyi-Koch, Tareq Hossain, Kyana Sanders, Ilia Guzei, Kenneth R. Graham, John C. Wright, Song Jin

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

2D Ruddlesden-Popper (RP) lead halide perovskites have highly tunable structures, compositions, and properties that enable their promising optoelectronic applications. Among various 2D halide perovskites, the materials chemistry and fundamental optoelectronic properties of high layer number (n) lead-bromide RP perovskites, where n refers to the number of inorganic octahedra layers, have been less studied. Here, we report the synthesis of thin nanosheets of (PEA)2Csn-1PbnBr3n+1 (n = 1-6, PEA = phenylethylammonium) perovskites and study the optical properties, assigning photoluminescence emissions of 486, 496, and 505 nm to n = 4-6 phases, respectively, and reporting the photoluminescence lifetimes. The crystal structure of (PEA)2Cs2Pb3Br10 was determined to reveal minimal octahedral structural distortions. Ultraviolet photoelectron spectroscopy measurements reveal the positioning of the valence and conduction bands for n = 1-3 phases and confirm the type-I band alignment for the (PEA)2Csn-1PbnBr3n+1 series, laying the foundation for rational heterostructure device design in the future.

Original languageEnglish
Pages (from-to)2913-2921
Number of pages9
JournalACS Materials Letters
Volume5
Issue number11
DOIs
StatePublished - Nov 6 2023

Bibliographical note

Publisher Copyright:
© 2023 American Chemical Society.

ASJC Scopus subject areas

  • General Chemical Engineering
  • Biomedical Engineering
  • General Materials Science

Fingerprint

Dive into the research topics of 'High Layer Number (n = 1-6) 2D Ruddlesden-Popper Lead Bromide Perovskites: Nanosheets, Crystal Structure, and Optoelectronic Properties'. Together they form a unique fingerprint.

Cite this