Photoluminescence Lifetimes Exceeding 8 μs and Quantum Yields Exceeding 30% in Hybrid Perovskite Thin Films by Ligand Passivation
Abstract
We study the effects of a series of post-deposition ligand treatments on the photoluminescence (PL) of polycrystalline methylammonium lead triiodide perovskite thin films. We show that a variety of Lewis bases can improve the bulk PL quantum efficiency (PLQE) and extend the average PL lifetime, <τ>, with large enhancements concentrated at grain boundaries. Notably, we demonstrate thin-film PLQE as high as 35 ± 1% and <τ> as long as 8.82 ± 0.03 μs at solar equivalent carrier densities using tri-n-octylphosphine oxide-treated films. Using glow discharge optical emission spectroscopy and nuclear magnetic resonance spectroscopy, we show that the ligands are incorporated primarily at the film surface and are acting as electron donors. These results indicate it is possible to obtain thin-film PL lifetime and PLQE values that are comparable to those from single crystals by control over surface chemistry.
- Authors:
-
- Department of Chemistry, University of Washington, Box 351700, Seattle, Washington 98195-1700, United States
- Publication Date:
- Research Org.:
- Univ. of Washington, Seattle, WA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1297265
- Alternate Identifier(s):
- OSTI ID: 1436981
- Grant/Contract Number:
- SC0013957
- Resource Type:
- Published Article
- Journal Name:
- ACS Energy Letters
- Additional Journal Information:
- Journal Name: ACS Energy Letters Journal Volume: 1 Journal Issue: 2; Journal ID: ISSN 2380-8195
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 14 SOLAR ENERGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
deQuilettes, Dane W., Koch, Susanne, Burke, Sven, Paranji, Rajan K., Shropshire, Alfred J., Ziffer, Mark E., and Ginger, David S. Photoluminescence Lifetimes Exceeding 8 μs and Quantum Yields Exceeding 30% in Hybrid Perovskite Thin Films by Ligand Passivation. United States: N. p., 2016.
Web. doi:10.1021/acsenergylett.6b00236.
deQuilettes, Dane W., Koch, Susanne, Burke, Sven, Paranji, Rajan K., Shropshire, Alfred J., Ziffer, Mark E., & Ginger, David S. Photoluminescence Lifetimes Exceeding 8 μs and Quantum Yields Exceeding 30% in Hybrid Perovskite Thin Films by Ligand Passivation. United States. https://doi.org/10.1021/acsenergylett.6b00236
deQuilettes, Dane W., Koch, Susanne, Burke, Sven, Paranji, Rajan K., Shropshire, Alfred J., Ziffer, Mark E., and Ginger, David S. Fri .
"Photoluminescence Lifetimes Exceeding 8 μs and Quantum Yields Exceeding 30% in Hybrid Perovskite Thin Films by Ligand Passivation". United States. https://doi.org/10.1021/acsenergylett.6b00236.
@article{osti_1297265,
title = {Photoluminescence Lifetimes Exceeding 8 μs and Quantum Yields Exceeding 30% in Hybrid Perovskite Thin Films by Ligand Passivation},
author = {deQuilettes, Dane W. and Koch, Susanne and Burke, Sven and Paranji, Rajan K. and Shropshire, Alfred J. and Ziffer, Mark E. and Ginger, David S.},
abstractNote = {We study the effects of a series of post-deposition ligand treatments on the photoluminescence (PL) of polycrystalline methylammonium lead triiodide perovskite thin films. We show that a variety of Lewis bases can improve the bulk PL quantum efficiency (PLQE) and extend the average PL lifetime, <τ>, with large enhancements concentrated at grain boundaries. Notably, we demonstrate thin-film PLQE as high as 35 ± 1% and <τ> as long as 8.82 ± 0.03 μs at solar equivalent carrier densities using tri-n-octylphosphine oxide-treated films. Using glow discharge optical emission spectroscopy and nuclear magnetic resonance spectroscopy, we show that the ligands are incorporated primarily at the film surface and are acting as electron donors. These results indicate it is possible to obtain thin-film PL lifetime and PLQE values that are comparable to those from single crystals by control over surface chemistry.},
doi = {10.1021/acsenergylett.6b00236},
journal = {ACS Energy Letters},
number = 2,
volume = 1,
place = {United States},
year = {Fri Jul 29 00:00:00 EDT 2016},
month = {Fri Jul 29 00:00:00 EDT 2016}
}
https://doi.org/10.1021/acsenergylett.6b00236
Web of Science
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