Document Type

Journal Article

Department/Unit

Department of Physics

Language

English

Abstract

The effect of morphology control on the performance of inorganic cesium lead halide based green perovskite light-emitting diodes (PeLEDs) was analyzed. The PeLEDs were prepared using two different formulation approaches: (1) the solution was prepared by dissolving CsPbBr3 powders in dimethyl sulfoxide (DMSO), and (2) the precursor solution was formulated by dissolving CsBr and PbBr2 powders with different molar ratios of CsBr to PbBr2 in DMSO. The peak luminance of 4590 cd/m2 was obtained for PeLEDs made with CsPbBr3-solution, which is 48 and 12 times higher than that of the optimized PeLEDs fabricated using CsBr/PbBr2 precursor solutions with different molar ratios of CsBr to PbBr2 of 2:1 and 1:1. Our results reveal that the morphology and control of excess Pb atoms in the perovskite emitting layer play the important role in modulating the current losses and radiative decay rate, which were optimized in this work for attaining efficient operation of the PeLEDs.

Publication Date

2-2018

Source Publication Title

Journal of Materials Chemistry C

Issue

6

Start Page

1573

End Page

1578

Publisher

Royal Society of Chemistry

Peer Reviewed

1

Copyright

This journal is © The Royal Society of Chemistry 2018

Funder

This work was supported by the National Natural Science Foundation of China (Grants. 61604149, 61376062, 61376022, 61575192 and 61504145); The Science and Technology Development Plan of Jilin Province (20170520130JH and 20140101094JC); The Project of Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices (KJS1615). Hong Kong Baptist University Faculty Research Grant (FRG2/2016-17/088); Interinstitutional Collaborative Research Scheme (RC-ICRS/15-16/04); and Shenzhen Peacock Plan (KQTD20140630110339343).

DOI

10.1039/C7TC04631F

Link to Publisher's Edition

http://dx.doi.org/10.1039/C7TC04631F

ISSN (print)

20507526

JA-5052-29474_suppl.pdf (375 kB)
Supporting Information

Available for download on Friday, March 01, 2019

Additional Files

JA-5052-29474_suppl.pdf (375 kB)
Supporting Information

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