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

Autor: Mollick S; Department of Chemistry , Indian Institute of Science Education and Research (IISER) Pune , Dr. HomiBhabha Road, Pashan , Pune 411008 , India . Email: sghosh@gmail.com., Mandal TN; Department of Chemistry , Indian Institute of Science Education and Research (IISER) Pune , Dr. HomiBhabha Road, Pashan , Pune 411008 , India . Email: sghosh@gmail.com., Jana A; Center for Superfunctional Materials , Department of Chemistry , School of Natural Science , Ulsan National Institute of Science and Technology (UNIST) , Ulsan 44919 , South Korea., Fajal S; Department of Chemistry , Indian Institute of Science Education and Research (IISER) Pune , Dr. HomiBhabha Road, Pashan , Pune 411008 , India . Email: sghosh@gmail.com., Ghosh SK; Department of Chemistry , Indian Institute of Science Education and Research (IISER) Pune , Dr. HomiBhabha Road, Pashan , Pune 411008 , India . Email: sghosh@gmail.com.; Centre for Energy Science , IISER Pune , Pune 411008 , India.
Jazyk: angličtina
Zdroj: Chemical science [Chem Sci] 2019 Sep 25; Vol. 10 (45), pp. 10524-10530. Date of Electronic Publication: 2019 Sep 25 (Print Publication: 2019).
DOI: 10.1039/c9sc03829a
Abstrakt: 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.
(This journal is © The Royal Society of Chemistry 2019.)
Databáze: MEDLINE
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