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Related Experiment Video

Updated: Jun 10, 2025

Development of Efficient OLEDs from Solution Deposition

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Published on: November 4, 2022

Coherence Programming for Efficient Linearly Polarized Perovskite Light-Emitting Diodes.

Meiqin Xiao¹, Jonghee Yang², Wei Zhang³

¹Chongqing Key Laboratory of Micro&Nano Structure Optoelectronics, School of Physical Science and Technology, Southwest University, Chongqing 400715, China.

|October 10, 2024

Summary

Researchers developed a new method for creating highly efficient linearly polarized perovskite light-emitting diodes (LP-PeLEDs). This breakthrough overcomes previous challenges in controlling perovskite crystal orientation and defects, enabling practical LP-PeLED applications.

Keywords:

light-emitting diodes linearly polarized oriented growth passivation quasi-2D perovskites

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Area of Science:

Materials Science
Optoelectronics
Solid-State Chemistry

Background:

Quasi-two-dimensional (quasi-2D) perovskites offer potential for efficient linearly polarized electroluminescence due to anisotropic structures.
Practical implementation of linearly polarized perovskite light-emitting diodes (LP-PeLEDs) has been hindered by challenges in controlling perovskite orientation, phase distribution, and defect minimization.

Purpose of the Study:

To develop a synergistic strategy for fabricating quasi-2D perovskite films with controlled orientation and reduced defects.
To achieve macroscopic alignment of transition dipole moments (TDMs) for efficient linearly polarized emission.
To demonstrate highly efficient LP-PeLEDs with improved performance and communication capabilities.

Main Methods:

Incorporation of a trimethylolpropane triacrylate anchoring layer to guide oriented perovskite growth along the (110) plane.
Use of 18-Crown-6 molecular passivator to reduce defects and homogenize crystal phase.
Fabrication of a "coherence-programmed emission layer" for LP-PeLEDs.

Main Results:

Achieved oriented growth of quasi-2D perovskites with aligned TDMs.
Demonstrated LP-PeLEDs with high external quantum efficiency (∼23.7%) and brightness (∼36,142 cd/m²).
Obtained a high degree of linear polarization (DoLP) of ∼38% and improved signal-to-interference-and-noise ratio in visible light communication systems.

Conclusions:

The synergistic strategy effectively controls quasi-2D perovskite orientation and phase, enabling efficient LP-PeLEDs.
The developed LP-PeLEDs show promising performance for optoelectronic applications and visible light communication.
This work paves the way for practical applications of quasi-2D perovskites in polarized light emission.