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

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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Turtle is a human-readable linked data format.

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