Efficient emission of quasi-two-dimensional perovskite films cast by inkjet printing for pixel-defined matrix light-emitting diodes

Junjie Wang; Danyang Li; Jian Wang; Junbiao Peng

doi:10.1088/2752-5724/ac9b2d

Volume 1 Issue 4

December 2022

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Junjie Wang, Danyang Li, Jian Wang, Junbiao Peng. Efficient emission of quasi-two-dimensional perovskite films cast by inkjet printing for pixel-defined matrix light-emitting diodes[J]. Materials Futures, 2022, 1(4): 045301. doi: 10.1088/2752-5724/ac9b2d

Citation:

Junjie Wang, Danyang Li, Jian Wang, Junbiao Peng. Efficient emission of quasi-two-dimensional perovskite films cast by inkjet printing for pixel-defined matrix light-emitting diodes[J]. Materials Futures, 2022, 1(4): 045301. doi: 10.1088/2752-5724/ac9b2d

Citation:

Junjie Wang, Danyang Li, Jian Wang, Junbiao Peng. Efficient emission of quasi-two-dimensional perovskite films cast by inkjet printing for pixel-defined matrix light-emitting diodes[J]. Materials Futures, 2022, 1(4): 045301. doi: 10.1088/2752-5724/ac9b2d

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Efficient emission of quasi-two-dimensional perovskite films cast by inkjet printing for pixel-defined matrix light-emitting diodes

Materials Futures, Volume 1, Number 4

Received Date: 2022-08-16
Accepted Date: 2022-10-18
Rev Recd Date: 2022-09-23
Publish Date: 2022-11-17

Article information

doi: 10.1088/2752-5724/ac9b2d

Institute of Polymer Optoelectronic Materials and Devices, State Key Laboratory of Luminescent Materials and Devices, South China University of Technology, Guangzhou 510640, People’s Republic of China
Author to whom any correspondence should be addressed.

More Information

Corresponding author: E-mail: psjbpeng@scut.edu.cn

Abstract

Abstract

Quasi-two-dimensional (quasi-2D) perovskites are promising materials for potential application in light-emitting diodes (LEDs) due to their high exciton binding energy and efficient emission. However, their luminescent performance is limited by the low-n phases that act as quenching luminescence centers. Here, a novel strategy for eliminating low-n phases is proposed based on the doping of strontium bromide (SrBr₂) in perovskites, in which SrBr₂ is able to manipulate the growth of quasi-2D perovskites during their formation. It was reasonably inferred that SrBr₂ readily dissociated strontium ions (Sr²⁺) in dimethyl sulfoxide solvent, and Sr²⁺ was preferentially adsorbed around [PbBr₆]^4- through strong electrostatic interaction between them, leading to a controllable growth of quasi-2D perovskites by appropriately increasing the formation energy of perovskites. It has been experimentally proved that the growth can almost completely eliminate low-n phases of quasi-2D perovskite films, which exhibited remarkably enhanced photoluminescence. A high electroluminescent efficiency matrix green quasi-2D perovskite-LED (PeLED) with a pixel density of 120 pixels per inch fabricated by inkjet printing technique was achieved, exhibiting a peak external quantum efficiency of 13.9%, which is the most efficient matrix green quasi-2D PeLED so far to our knowledge.
- quasi-2D perovskite,
- inkjet printing,
- SrBr₂ doping,
- phase distribution,
- pixel-defined matrix LEDs

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Conflict of interest

The authors declare that they have no conflict of interest.

Author contributions

Junjie Wang and Junbiao Peng designed the experiments; Junjie Wang performed the experiments; Junjie Wang and Danyang Li helped with the measurements. Junjie Wang and Danyang Li helped with the inkjet printing operation. Junjie Wang wrote the paper with support from Junbiao Peng. Jian Wang gave valuable advice. All authors contributed to the general discussion.

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