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Title: 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:
 [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. 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}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1021/acsenergylett.6b00236

Citation Metrics:
Cited by: 380 works
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Figures / Tables:

Figure 1 Figure 1: Photoluminescence studies of films treated with Lewis bases. (a) Bulk time-resolved photoluminescence decay traces of control (black) film treated with trioctylphosphine oxide (TOPO, red), octadecanethiol (ODT, orange), and triphenylphosphine (PPh3, blue), excited with pulsed excitation (470 nm, 125 kHz repetition rate, 30 nJ/cm2 per pulse). (b) Integrated PLmore » intensity statistics of control and TOPO-, ODT-, and PPh3-treated films. Error bars are standard error of the mean for N = 20.« less

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