Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 7, Issue 13, Pages 3795-3801Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8tc06482b
Keywords
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Funding
- European Commission [675867]
- Spanish Ministry of Economy and Competitiveness (MINECO) via the Unidad de Excelencia Maria de Maeztu [MDM-2015-0538, MAT2017-88821-R]
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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.
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