Title
Large area perovskite light-emitting diodes by gas-assisted crystallization
Author
Prakasam, V.
Tordera, D.
di Giacomo, F.
Abbel, R.
Langen, A.
Gelinck, G.
Bolink, H.J.
Publication year
2019
Abstract
Halide perovskites have been gaining considerable attention recently for use in light-emitting applications, due to their bandgap tunability, color purity and low cost fabrication methods. However, current fabrication techniques limit the processing to small-area devices. Here, we show that a facile N 2 gas-quenching technique can be used to make methylammonium lead bromide-based perovskite light-emitting diodes (PeLEDs) with a peak luminance of 6600 cd m ?2 and a current efficiency of 7.0 cd A ?1 . We use this strategy to upscale PeLEDs to large-area substrates (230 cm 2 ) by developing a protocol for slot-die coating combined with gas-quenching. The resulting large area devices (9 devices of each 4.46 cm 2 per substrate) with three slot-die coated layers exhibit uniform emission with a peak luminance of 550 cd m ?2 and a current efficiency of 2.6 cd A ?1 . The reasons for the reduced performance and improvement routes are discussed. These results mark a vital step towards scalable manufacturing techniques for PeLEDs.
Subject
Industrial Innovation
Perovskite light emitting diodes
Luminance
Halide perovskites
Large area devices
Manufacturing techniques
Slot-die coatings
Quenching
To reference this document use:
http://resolver.tudelft.nl/uuid:2d53176c-da90-4740-a6dc-af4f9f6fcb30
DOI
https://doi.org/10.1039/c8tc06482b/
TNO identifier
866887
Publisher
Royal Society of Chemistry
ISSN
2050-7534
Source
Journal of Materials Chemistry C, 7 (13), 3795-3801
Document type
article