A hybrid blue perovskite@metal-organic gel (MOG) nanocomposite: simultaneous improvement of luminescence and stability

Blue light-emitting hybrid perovskite nanocrystals (NCs) are promising candidates for optoelectronic applications. However, these NCs suffer severely from low photoluminescence quantum yield (PLQY) and inferior stability under working conditions. Herein, we report, for the first time, a simultaneous...

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Bibliographic Details
Published in:Chemical science (Cambridge) 2019-12, Vol.1 (45), p.1524-153
Main Authors: Mollick, Samraj, Mandal, Tarak Nath, Jana, Atanu, Fajal, Sahel, Ghosh, Sujit K
Format: Article
Language:English
Subjects:
Chemistry
Diodes
Flexibility
Luminescence
Nanocomposites
Nanocrystals
Optoelectronics
Organic light emitting diodes
Perovskites
Photoluminescence
Stability tests
Water stability
White light
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Summary:Blue light-emitting hybrid perovskite nanocrystals (NCs) are promising candidates for optoelectronic applications. However, these NCs suffer severely from low photoluminescence quantum yield (PLQY) and inferior stability under working conditions. Herein, we report, for the first time, a simultaneous dramatic improvement in both the luminescence and the stability of hybrid perovskite NCs through embedding in a porous metal-organic gel (MOG) matrix. The nanocomposite (EAPbBr 3 @MOG, EA: ethylammonium) shows sharp emission in the intense blue region ( λ max < 440 nm), with a substantial ten-fold enhancement in the PLQY (∼53%) compared with EAPbBr 3 NCs (PLQY ∼5%). Incorporation of perovskite NCs into the soft MOG matrix provides the additional benefits of flexibility as well as water stability. As a proof of principle, these nanocomposites were further utilized to fabricate a white light-emitting diode. The combination of high brightness, stability and flexibility of these nanocomposites could render them viable contenders in the development of efficient, blue light-emitting diodes for practical applications. Weakly blue emitting EAPbBr 3 NCs transformed into a highly intense blue material after embedding inside metal-organic gel (MOG) matrix. The nanocomposite showing outstanding stability in water and under UV light for longer period of time.
ISSN:2041-6520
2041-6539
DOI:10.1039/c9sc03829a