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Issue 5, 2017
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Effect of the solvent used for fabrication of perovskite films by solvent dropping on performance of perovskite light-emitting diodes

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Abstract

Organic–inorganic hybrid perovskites have emerged as a next-generation candidate for light-emitting device applications due to their excellent optical and electrical properties with narrow band emission compared to organic emitters. The morphological control of perovskite films with full surface coverage and few defect sites is essential for achieving highly efficient perovskite light-emitting diodes (PeLEDs). Here, we obtain a highly uniform perovskite film with a remarkably reduced number of defect sites in a perovskite crystal using chlorobenzene dropping. This effort leads to the enhanced performance of PeLEDs with a CH3NH3PbBr3 film using chlorobenzene dropping with a maximum luminance of 14 460 cd m−2 (at 3.8 V) and a maximum external quantum efficiency (EQE) of 0.71% (at 2.8 V). This research confirms that the role of the solvent in the solvent dropping method is to fabricate a dense and uniform perovskite film and to passivate the defect sites of the perovskite crystal films.

Graphical abstract: Effect of the solvent used for fabrication of perovskite films by solvent dropping on performance of perovskite light-emitting diodes

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Publication details

The article was received on 18 Oct 2016, accepted on 29 Dec 2016 and first published on 04 Jan 2017


Article type: Paper
DOI: 10.1039/C6NR08158D
Citation: Nanoscale, 2017,9, 2088-2094
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    Effect of the solvent used for fabrication of perovskite films by solvent dropping on performance of perovskite light-emitting diodes

    J. C. Yu, D. W. Kim, D. B. Kim, E. D. Jung, K. Lee, S. Lee, D. D. Nuzzo, J. Kim and M. H. Song, Nanoscale, 2017, 9, 2088
    DOI: 10.1039/C6NR08158D

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