Modulation of recombination zone position for quasi-two-dimensional blue perovskite light-emitting diodes with efficiency exceeding 5% View Full Text


Ontology type: schema:ScholarlyArticle      Open Access: True


Article Info

DATE

2019-12

AUTHORS

Zhenchao Li, Ziming Chen, Yongchao Yang, Qifan Xue, Hin-Lap Yip, Yong Cao

ABSTRACT

In recent years, substantial progress has been made in developing perovskite light-emitting diodes with near-infrared, red and green emissions and over 20% external quantum efficiency. However, the development of perovskite light-emitting diodes with blue emission remains a great challenge, which retards further development of full-color displays and white-light illumination based on perovskite emissive materials. Here, firstly, through composition and dimensional engineering, we prepare quasi-two-dimensional perovskite thin films with improved blue emission, taking advantages of reduced trap density and enhanced photoluminescence quantum yield. Secondly, we find a vertically non-uniform distribution of perovskite crystals in the PEDOT:PSS/perovskite hybrid film. Through modulating the position of the recombination zone, we activate the majority of quasi-two-dimensional perovskite crystals, and thus demonstrate the most efficient blue perovskite light-emitting diode to date with emission peak at 480 nm, record luminance of 3780 cd m-2 and record external quantum efficiency of 5.7%. More... »

PAGES

1027

References to SciGraph publications

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  • Journal

    TITLE

    Nature Communications

    ISSUE

    1

    VOLUME

    10

    Identifiers

    URI

    http://scigraph.springernature.com/pub.10.1038/s41467-019-09011-5

    DOI

    http://dx.doi.org/10.1038/s41467-019-09011-5

    DIMENSIONS

    https://app.dimensions.ai/details/publication/pub.1112509002

    PUBMED

    https://www.ncbi.nlm.nih.gov/pubmed/30833581


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    JSON-LD is a popular format for linked data which is fully compatible with JSON.

    curl -H 'Accept: application/ld+json' 'https://scigraph.springernature.com/pub.10.1038/s41467-019-09011-5'

    N-Triples is a line-based linked data format ideal for batch operations.

    curl -H 'Accept: application/n-triples' 'https://scigraph.springernature.com/pub.10.1038/s41467-019-09011-5'

    Turtle is a human-readable linked data format.

    curl -H 'Accept: text/turtle' 'https://scigraph.springernature.com/pub.10.1038/s41467-019-09011-5'

    RDF/XML is a standard XML format for linked data.

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