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Title: Rapid crystallization of all-inorganic CsPbBr3 perovskite for high-brightness light-emitting diodes
Authors: Ng, Yan Fong
Nur Fadilah Jamaludin
Yantara, Natalia
Li, Mingjie
Irukuvarjula, Venkata Kameshwar Rao
Demir, Hilmi Volkan
Sum, Tze Chien
Mhaisalkar, Subodh
Mathews, Nripan
Keywords: Engineering::Materials
Issue Date: 2017
Source: Ng, Y. F., Nur Fadilah Jamaludin, Yantara, N., Li, M., Irukuvarjula, V. K. R., Demir, H. V., . . . Mathews, N. (2017). Rapid crystallization of all-inorganic CsPbBr3 perovskite for high-brightness light-emitting diodes. Acs Omega, 2(6), 2757-2764. doi:10.1021/acsomega.7b00360
Journal: ACS Omega
Abstract: Research into perovskite-based light-emitting diodes (PeLEDs) has been rapidly gaining momentum since the initial reports of green-emitting methylammonium lead bromide (CH3NH3PbBr3)-based devices were published. However, issues pertaining to its stability and morphological control still hamper progress toward high performing devices. Solvent engineering, a technique typically employed to modulate film crystallization, offers little opportunity for scale-up due to the tendency for inhomogeneous film growth and low degree of reproducibility. Here, we propose and show a simple gas-facilitated process to deposit a stable, all-inorganic perovskite CsPbBr3 film. The formation of smaller and less percolated grains, which gives rise to enhanced optical properties, highlights the importance of spatial charge confinement in the film. Consequently, the performance of our PeLEDs shows great improvement, with luminance as high as 8218 cd m–2 and turn-on voltage as low as 2.4 V. Concomitantly, the current efficiency and EQE of our device were increased to 0.72 cd A–1 and 0.088%, respectively. High reproducibility in the performance of PeLEDs fabricated using this process opens the path for large-area devices.
ISSN: 2470-1343
DOI: 10.1021/acsomega.7b00360
Schools: School of Electrical and Electronic Engineering 
School of Materials Science and Engineering 
School of Physical and Mathematical Sciences 
Interdisciplinary Graduate School (IGS) 
Organisations: LUMINOUS! Center of Excellence for Semiconductor Lighting and Displays
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Rights: © 2017 American Chemical Society. This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles

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