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...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2020
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| Online Access: | https://hdl.handle.net/10356/141120 |
| _version_ | 1811692531590627328 |
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| 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 |
| 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 |
| author_sort | Veldhuis, Sjoerd Antonius |
| collection | NTU |
| 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. |
| first_indexed | 2024-10-01T06:37:16Z |
| format | Journal Article |
| id | ntu-10356/141120 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T06:37:16Z |
| publishDate | 2020 |
| record_format | dspace |
| spelling | ntu-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 |
| 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 |
| title | 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_short | 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 |
| topic | Science::Physics Perovskites Quantum Dots |
| url | https://hdl.handle.net/10356/141120 |
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