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Open Access

Effect of Chloride Ion Concentrations on Luminescence Peak Blue Shift of Light-Emitting Diode Using Anti-Solvent Extraction of Quasi-Two-Dimensional Perovskite

Beijing Advanced Innovation Center for Materials Genome Engineering, Beijing Key Laboratory for Sensor, MOE Key Laboratory for Modern Measurement and Control Technology, Beijing Information Science and Technology University, Beijing 100101, China.
State Key Laboratory on Integrated Optoelectronics, Institute of Semiconductor, Chinese Academy of Sciences, Beijing 100083, China.
Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
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Abstract

In recent years, Perovskite Light-Emitting Diodes (PeLEDs) have received considerable attention in academia. However, with the development of PeLEDs, commercial applications of full-color PeLED technology are largely limited by the progress of blue-emitting devices, due to the uncontrollably accurate composition, unstable properties, and low luminance. In this article, we add Cesium chloride (CsCl) to the quasi-two-dimensional (quasi-2D) perovskite precursor solution and achieve the relatively blue shifts of PeLED emission peak by introducing chloride ions for photoluminescence (PL) and electroluminescence (EL). We also found that the introduction of chlorine ions can make quasi-2D perovskite films thinner with smoother surface of 0.408 nm. It is interesting that the EL peaks and intensities of PeLED are adjustable under different driving voltages in high concentration chlorine-added perovskite devices, and different processes of photo-excited, photo-quenched, and photo-excited occur sequentially with the increasing driving voltage. Our work provides a path for demonstrating full-color screens in the future.

Keywords

Perovskite Light-Emitting Diodes (PeLEDs)quasi-two-dimensional (quasi-2D)chloride ionsblue shifts

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Tsinghua Science and Technology
Volume 26 Issue 4,
August 2021
Pages 496-504
DOI: 10.26599/TST.2020.9010013
Cite this article:
Liu B, Zou X, Chen D, et al. Effect of Chloride Ion Concentrations on Luminescence Peak Blue Shift of Light-Emitting Diode Using Anti-Solvent Extraction of Quasi-Two-Dimensional Perovskite. Tsinghua Science and Technology, 2021, 26(4): 496-504. https://doi.org/10.26599/TST.2020.9010013

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Received: 31 March 2020
Accepted: 15 April 2020
Published: 04 January 2021
© The author(s) 2021

The articles published in this open access journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/).
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