Minimising efficiency roll-off in high-brightness perovskite light-emitting diodes

Wei Zou, Renzhi Li, Shuting Zhang, Yunlong Liu, Nana Wang, Yu Cao, Yanfeng Miao, Mengmeng Xu, Qiang Guo, Dawei Di, Li Zhang, Chang Yi, Feng Gao, Richard H. Friend, Jianpu Wang () and Wei Huang ()
Additional contact information
Wei Zou: Nanjing Tech University (NanjingTech)
Renzhi Li: Nanjing Tech University (NanjingTech)
Shuting Zhang: Nanjing Tech University (NanjingTech)
Yunlong Liu: Nanjing Tech University (NanjingTech)
Nana Wang: Nanjing Tech University (NanjingTech)
Yu Cao: Nanjing Tech University (NanjingTech)
Yanfeng Miao: Nanjing Tech University (NanjingTech)
Mengmeng Xu: Nanjing Tech University (NanjingTech)
Qiang Guo: Nanjing Tech University (NanjingTech)
Dawei Di: Cambridge University
Li Zhang: Nanjing Tech University (NanjingTech)
Chang Yi: Nanjing Tech University (NanjingTech)
Feng Gao: Linköping University
Richard H. Friend: Cambridge University
Jianpu Wang: Nanjing Tech University (NanjingTech)
Wei Huang: Nanjing Tech University (NanjingTech)

Nature Communications, 2018, vol. 9, issue 1, 1-7

Abstract: Abstract Efficiency roll-off is a major issue for most types of light-emitting diodes (LEDs), and its origins remain controversial. Here we present investigations of the efficiency roll-off in perovskite LEDs based on two-dimensional layered perovskites. By simultaneously measuring electroluminescence and photoluminescence on a working device, supported by transient photoluminescence decay measurements, we conclude that the efficiency roll-off in perovskite LEDs is mainly due to luminescence quenching which is likely caused by non-radiative Auger recombination. This detrimental effect can be suppressed by increasing the width of quantum wells, which can be easily realized in the layered perovskites by tuning the ratio of large and small organic cations in the precursor solution. This approach leads to the realization of a perovskite LED with a record external quantum efficiency of 12.7%, and the efficiency remains to be high, at approximately 10%, under a high current density of 500 mA cm−2.

Date: 2018
References: Add references at CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.nature.com/articles/s41467-018-03049-7 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:9:y:2018:i:1:d:10.1038_s41467-018-03049-7

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-018-03049-7

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().