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Title: Designing the perovskite structural landscape for efficient blue emission
Authors: Yantara, Natalia
Nur Fadilah Jamaludin
Febriansyah, Benny
Giovanni, David
Bruno, Annalisa
Soci, Cesare
Sum, Tze Chien
Mhaisalkar, Subodh
Mathews, Nripan
Keywords: Engineering::Materials::Energy materials
Issue Date: 2020
Source: Yantara, N., Nur Fadilah Jamaludin, Febriansyah, B., Giovanni, D., Bruno, A., Soci, C., ... Mathews, N. (2020). Designing the perovskite structural landscape for efficient blue emission. ACS Energy Letters, 1593-1600. doi:10.1021/acsenergylett.0c00559
Project: NRF-CRP14-2014-03
Journal: ACS Energy Letters
Abstract: Despite the rapid development of perovskite light-emitting diodes (PeLEDs) in recent years, blue PeLEDs’ efficiencies are still inferior to those of their red and green counterparts. The poor performance is associated with, among other factors, halide segregation in bromide-chloride materials and energy funneling to lowest bandgaps in multilayered Ruddlesden–Popper (RP) systems. This study reports that compositional engineering through prudent selection of the A-site cation in a pure bromide RP system can result in a narrow distribution of layered domains. With a narrow distribution centered around the desired RP domain, efficient energy cascade to yield blue emission is ensured. Coupled with rapid nucleation induced by an antisolvent deposition technique, record efficiencies of 2.34 and 5.08%, corresponding to color-stable deep blue (∼465 nm) and cyan (∼493 nm), respectively, were attained. This composition and process engineering to design favorable structural landscape is transferrable to other material systems, which paves the way for high-performance PeLEDs.
ISSN: 2380-8195
DOI: 10.1021/acsenergylett.0c00559
DOI (Related Dataset):
Schools: School of Materials Science and Engineering 
School of Physical and Mathematical Sciences 
Interdisciplinary Graduate School (IGS) 
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Rights: This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Energy Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles

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