Benzyl alcohol-treated CH3NH3PbBr3 nanocrystals exhibiting high luminescence, stability, and ultralow amplified spontaneous emission thresholds

We report the high yield synthesis of about 11 nm sized CH3NH3PbBr3 nanocrystals with near-unity photoluminescence quantum yield. The nanocrystals are formed in the presence of surface-binding ligands through their direct precipitation in a benzyl alcohol/toluene phase. The benzyl alcohol plays a pi...

Full description

Saved in:
Bibliographic Details
Main Authors: Veldhuis, Sjoerd Antonius, Tay, Eugene Yong Kang, Bruno, Annalisa, Dintakurti, Sai S. H., Bhaumik, Saikat, Muduli, Subas Kumar, Li, Mingjie, Mathews, Nripan, Sum, Tze Chien, Mhaisalkar, Subodh Gautam
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2020
Subjects:
Online Access:https://hdl.handle.net/10356/141120
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-141120
record_format dspace
spelling sg-ntu-dr.10356-1411202021-01-06T07:58:42Z Benzyl alcohol-treated CH3NH3PbBr3 nanocrystals exhibiting high luminescence, stability, and ultralow amplified spontaneous emission thresholds Veldhuis, Sjoerd Antonius Tay, Eugene Yong Kang Bruno, Annalisa Dintakurti, Sai S. H. Bhaumik, Saikat Muduli, Subas Kumar Li, Mingjie Mathews, Nripan Sum, Tze Chien Mhaisalkar, Subodh Gautam School of Materials Science and Engineering School of Physical and Mathematical Sciences Energy Research Institute @ NTU (ERI@N) Science::Physics Perovskites Quantum Dots We report the high yield synthesis of about 11 nm sized CH3NH3PbBr3 nanocrystals with near-unity photoluminescence quantum yield. The nanocrystals are formed in the presence of surface-binding ligands through their direct precipitation in a benzyl alcohol/toluene phase. The benzyl alcohol plays a pivotal role in steering the surface ligands binding motifs on the NC surface, resulting in enhanced surface-trap passivation and near-unity PLQY values. We further demonstrate that thin films from purified CH3NH3PbBr3 nanocrystals are stable >4 months in air, exhibit high optical gain (about 520 cm-1), and display stable, ultralow amplified spontaneous emission thresholds of 13.9 ± 1.3 and 569.7 ± 6 μJ cm-2 at one-photon (400 nm) and two-photon (800 nm) absorption, respectively. To the best of our knowledge, the latter signifies a 5-fold reduction of the lowest reported threshold value for halide perovskite nanocrystals to date, which makes them ideal candidates for light-emitting and low-threshold lasing applications. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Accepted version 2020-06-04T04:20:40Z 2020-06-04T04:20:40Z 2017 Journal Article Veldhuis, S. A., Tay, E. Y. K., Bruno, A., Dintakurti, S. S. H., Bhaumik, S., Muduli, S. K., . . . Mhaisalkar, S. G. (2017). Benzyl alcohol-treated CH3NH3PbBr3 nanocrystals exhibiting high luminescence, stability, and ultralow amplified spontaneous emission thresholds. Nano Letters, 17(12), 7424-7432. doi:10.1021/acs.nanolett.7b03272 1530-6984 https://hdl.handle.net/10356/141120 10.1021/acs.nanolett.7b03272 29125763 2-s2.0-85038211880 12 17 7424 7432 en Nano Letters This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.nanolett.7b03272 application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Science::Physics
Perovskites
Quantum Dots
spellingShingle Science::Physics
Perovskites
Quantum Dots
Veldhuis, Sjoerd Antonius
Tay, Eugene Yong Kang
Bruno, Annalisa
Dintakurti, Sai S. H.
Bhaumik, Saikat
Muduli, Subas Kumar
Li, Mingjie
Mathews, Nripan
Sum, Tze Chien
Mhaisalkar, Subodh Gautam
Benzyl alcohol-treated CH3NH3PbBr3 nanocrystals exhibiting high luminescence, stability, and ultralow amplified spontaneous emission thresholds
description We report the high yield synthesis of about 11 nm sized CH3NH3PbBr3 nanocrystals with near-unity photoluminescence quantum yield. The nanocrystals are formed in the presence of surface-binding ligands through their direct precipitation in a benzyl alcohol/toluene phase. The benzyl alcohol plays a pivotal role in steering the surface ligands binding motifs on the NC surface, resulting in enhanced surface-trap passivation and near-unity PLQY values. We further demonstrate that thin films from purified CH3NH3PbBr3 nanocrystals are stable >4 months in air, exhibit high optical gain (about 520 cm-1), and display stable, ultralow amplified spontaneous emission thresholds of 13.9 ± 1.3 and 569.7 ± 6 μJ cm-2 at one-photon (400 nm) and two-photon (800 nm) absorption, respectively. To the best of our knowledge, the latter signifies a 5-fold reduction of the lowest reported threshold value for halide perovskite nanocrystals to date, which makes them ideal candidates for light-emitting and low-threshold lasing applications.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Veldhuis, Sjoerd Antonius
Tay, Eugene Yong Kang
Bruno, Annalisa
Dintakurti, Sai S. H.
Bhaumik, Saikat
Muduli, Subas Kumar
Li, Mingjie
Mathews, Nripan
Sum, Tze Chien
Mhaisalkar, Subodh Gautam
format Article
author Veldhuis, Sjoerd Antonius
Tay, Eugene Yong Kang
Bruno, Annalisa
Dintakurti, Sai S. H.
Bhaumik, Saikat
Muduli, Subas Kumar
Li, Mingjie
Mathews, Nripan
Sum, Tze Chien
Mhaisalkar, Subodh Gautam
author_sort Veldhuis, Sjoerd Antonius
title Benzyl alcohol-treated CH3NH3PbBr3 nanocrystals exhibiting high luminescence, stability, and ultralow amplified spontaneous emission thresholds
title_short Benzyl alcohol-treated CH3NH3PbBr3 nanocrystals exhibiting high luminescence, stability, and ultralow amplified spontaneous emission thresholds
title_full Benzyl alcohol-treated CH3NH3PbBr3 nanocrystals exhibiting high luminescence, stability, and ultralow amplified spontaneous emission thresholds
title_fullStr Benzyl alcohol-treated CH3NH3PbBr3 nanocrystals exhibiting high luminescence, stability, and ultralow amplified spontaneous emission thresholds
title_full_unstemmed Benzyl alcohol-treated CH3NH3PbBr3 nanocrystals exhibiting high luminescence, stability, and ultralow amplified spontaneous emission thresholds
title_sort benzyl alcohol-treated ch3nh3pbbr3 nanocrystals exhibiting high luminescence, stability, and ultralow amplified spontaneous emission thresholds
publishDate 2020
url https://hdl.handle.net/10356/141120
_version_ 1688665516902711296