Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/12289
Title: Highly mobile excitons in single crystal methylammonium lead tribromide perovskite microribbons
Authors: McClintock, Luke
Song, Ziyi
Travaglini, H. Clark
Senger, Ramazan Tuğrul
Chandrasekaran, Vigneshwaran
Htoon, Han
Yarotski, Dmitry
Yu, Dong
Keywords: Perovskites
Excitons
Solar energy
Publisher: American Chemical Society
Abstract: Excitons are often given negative connotation in solar energy harvesting in part due to their presumed short diffusion lengths. We investigate exciton transport in single-crystal methylammonium lead tribromide (MAPbBr3) microribbons via spectrally, spatially, and temporally resolved photocurrent and photoluminescence measurements. Distinct peaks in the photocurrent spectra unambiguously confirm exciton formation and allow for accurate extraction of the low temperature exciton binding energy (39 meV). Photocurrent decays within a few μm at room temperature, while a gate-tunable long-range photocurrent component appears at lower temperatures (about 100 μm below 140 K). Carrier lifetimes of 1.2 μs or shorter exclude the possibility of the long decay length arising from slow trapped-carrier hopping. Free carrier diffusion is also an unlikely source of the highly nonlocal photocurrent, due to their small fraction at low temperatures. We attribute the long-distance transport to high-mobility excitons, which may open up new opportunities for novel exciton-based photovoltaic applications.
URI: https://doi.org/10.1021/acs.jpclett.2c00274
https://hdl.handle.net/11147/12289
ISSN: 1948-7185
Appears in Collections:Physics / Fizik
PubMed İndeksli Yayınlar Koleksiyonu / PubMed Indexed Publications Collection
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File Description SizeFormat 
acs.jpclett.2c00274.pdfArticle (Makale)5.53 MBAdobe PDFView/Open
Show full item record



CORE Recommender

Page view(s)

13,316
checked on Nov 18, 2024

Download(s)

88
checked on Nov 18, 2024

Google ScholarTM

Check




Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.