Switchable Anion Exchange in Polymer-Encapsulated APbX3 Nanocrystals Delivers Stable All-Perovskite White Emitters
© 2021 The Authors. Published by American Chemical Society..
We report a one-step synthesis of halide perovskite nanocrystals embedded in amphiphilic polymer (poly(acrylic acid)-block-poly(styrene), PAA-b-PS) micelles, based on injecting a dimethylformamide solution of PAA-b-PS, PbBr2, ABr (A = Cs, formamidinium, or both) and "additive" molecules in toluene. These bifunctional or trifunctional short chain organic molecules improve the nanocrystal-polymer compatibility, increasing the nanocrystal stability against polar solvents and high flux irradiation (the nanocrystals retain almost 80% of their photoluminescence after 1 h of 3.2 w/cm2 irradiation). If the nanocrystals are suspended in toluene, the coil state of the polymer allows the nanocrystals to undergo halide exchange, enabling emission color tunability. If the nanocrystals are suspended in methanol, or dried as powders, the polymer is in the globule state, and they are inert to halide exchange. By mixing three primary colors we could prepare stable, multicolor emissive samples (for example, white emitting powders) and a UV-to-white color converting layer for light-emitting diodes entirely made of perovskite nanocrystals.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:6 |
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| Enthalten in: |
ACS energy letters - 6(2021), 8 vom: 13. Aug., Seite 2844-2853 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Imran, Muhammad [VerfasserIn] |
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| Anmerkungen: |
Date Revised 24.08.2021 published: Print-Electronic Citation Status PubMed-not-MEDLINE |
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| doi: |
10.1021/acsenergylett.1c01232 |
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| 520 | |a © 2021 The Authors. Published by American Chemical Society. | ||
| 520 | |a We report a one-step synthesis of halide perovskite nanocrystals embedded in amphiphilic polymer (poly(acrylic acid)-block-poly(styrene), PAA-b-PS) micelles, based on injecting a dimethylformamide solution of PAA-b-PS, PbBr2, ABr (A = Cs, formamidinium, or both) and "additive" molecules in toluene. These bifunctional or trifunctional short chain organic molecules improve the nanocrystal-polymer compatibility, increasing the nanocrystal stability against polar solvents and high flux irradiation (the nanocrystals retain almost 80% of their photoluminescence after 1 h of 3.2 w/cm2 irradiation). If the nanocrystals are suspended in toluene, the coil state of the polymer allows the nanocrystals to undergo halide exchange, enabling emission color tunability. If the nanocrystals are suspended in methanol, or dried as powders, the polymer is in the globule state, and they are inert to halide exchange. By mixing three primary colors we could prepare stable, multicolor emissive samples (for example, white emitting powders) and a UV-to-white color converting layer for light-emitting diodes entirely made of perovskite nanocrystals | ||
| 650 | 4 | |a Journal Article | |
| 700 | 1 | |a Mai, Binh T |e verfasserin |4 aut | |
| 700 | 1 | |a Goldoni, Luca |e verfasserin |4 aut | |
| 700 | 1 | |a Cirignano, Matilde |e verfasserin |4 aut | |
| 700 | 1 | |a Jalali, Houman Bahmani |e verfasserin |4 aut | |
| 700 | 1 | |a Di Stasio, Francesco |e verfasserin |4 aut | |
| 700 | 1 | |a Pellegrino, Teresa |e verfasserin |4 aut | |
| 700 | 1 | |a Manna, Liberato |e verfasserin |4 aut | |
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