Blade-coated perovskite nanoplatelet polymer composites for sky-blue light-emitting diodes.

Autor:	Chen J; Photophysics & OptoElectronics, Zernike Institute for Advanced Materials, University of Groningen Nijenborgh 3 9747AG Groningen The Netherlands M.A.Loi@rug.nl., Li J; Photophysics & OptoElectronics, Zernike Institute for Advanced Materials, University of Groningen Nijenborgh 3 9747AG Groningen The Netherlands M.A.Loi@rug.nl., Nedelcu G; Materials Chemistry, Zernike Institute for Advanced Materials, University of Groningen Nijenborgh 3 9747AG Groningen The Netherlands., Hansch P; Photophysics & OptoElectronics, Zernike Institute for Advanced Materials, University of Groningen Nijenborgh 3 9747AG Groningen The Netherlands M.A.Loi@rug.nl., Di Mario L; Photophysics & OptoElectronics, Zernike Institute for Advanced Materials, University of Groningen Nijenborgh 3 9747AG Groningen The Netherlands M.A.Loi@rug.nl., Protesescu L; Materials Chemistry, Zernike Institute for Advanced Materials, University of Groningen Nijenborgh 3 9747AG Groningen The Netherlands., Loi MA; Photophysics & OptoElectronics, Zernike Institute for Advanced Materials, University of Groningen Nijenborgh 3 9747AG Groningen The Netherlands M.A.Loi@rug.nl.
Jazyk:	angličtina
Zdroj:	Journal of materials chemistry. C [J Mater Chem C Mater] 2024 Jul 31; Vol. 12 (35), pp. 13847-13853. Date of Electronic Publication: 2024 Jul 31 (Print Publication: 2024).
DOI:	10.1039/d4tc02404d
Abstrakt:	Colloidal perovskite nanoplatelets (NPLs) have shown promise in tackling blue light-emitting diode challenges based on their tunable band gap and high photoluminescence efficiencies. However, high quality and large area dense NPL films have been proven to be very hard to prepare because of their chemical and physical fragility during the liquid phase deposition. Herein, we report a perovskite-polymer composite film deposition strategy with fine morphology engineering obtained using the blade coating method. The effects of the polymer type, solution concentration, compounding ratio and film thickness on the film quality are systematically investigated. We found that a relatively high-concentration suspension with an optimized NPL to polymer ratio of 1 : 2 is crucial for the suppression of phase separation and arriving at a uniform film. Finally, sky-blue NPL-based perovskite light-emitting diodes were fabricated by blade coating showing an EQE of 0.12% on a device area of 16 mm 2 . Competing Interests: There are no conflicts to declare. (This journal is © The Royal Society of Chemistry.)
Databáze:	MEDLINE
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