MRS Meetings and Events


EN05.10.31 2023 MRS Fall Meeting

Tunable Anode Work-Function by Self-Assembled Monolayers for High-Performance Pure Blue Light-Emitting Diodes Low Driving Voltage

When and Where

Nov 29, 2023
8:00pm - 10:00pm

Hynes, Level 1, Hall A



Hyo Jae Lee1,Jung Jae Do1,Jae Woong Jung1

Kyung Hee University1


Hyo Jae Lee1,Jung Jae Do1,Jae Woong Jung1

Kyung Hee University1
Organometallic trihalide perovskites have garnered significant attention for their potential in light-emitting diode applications, thanks to their unique characteristics including excellent color purity, color tunability, and ease of solution processing through scalable printing technology. Presently, perovskite emitters have achieved comparable electroluminescence and quantum efficiency to organic and quantum-dot display technologies in green and red-emitting perovskite light-emitting diodes (PeLEDs). However, blue-emitting PeLEDs still face challenges in terms of electroluminance, operational stability, and efficiency, primarily due to the relatively wide bandgap of the perovskite emitters (<i>E</i><sub>g</sub> &gt; 2.5 eV), which thus requires high driving bias for device operation. In this study, we propose a straightforward interfacial engineering approach to reduce the driving voltage of pure-blue PeLEDs by employing self-assembled monolayer (SAM) molecules on the indium tin oxide (ITO) electrode. The SAM layer facilitates the control of the electronic structure of the ITO surface by modulating its work function, thereby improving hole extraction properties at the lower internal interface. Furthermore, the functionalized SAM molecules interact with the under-coordinated perovskite lattices, providing interfacial interaction with the perovskite layers and facilitating radiative carrier recombination at lower driving bias. These desirable characteristics of SAM molecules enable enhancements in the electroluminescence and quantum efficiency of pure blue emission while requiring lower driving voltage. Moreover, the superior properties of the perovskite film, coupled with the reduced driving voltage, contribute to an extended operational stability of blue electroluminescence in PeLEDs. Consequently, this strategy demonstrates the remarkable potential of achieving high-performance PeLEDs with blue light emission, which is highly attractive for full-color perovskite display technologies.

Symposium Organizers

Marina Leite, University of California, Davis
Lina Quan, Virginia Institute of Technology
Samuel Stranks, University of Cambridge
Ni Zhao, Chinese University of Hong Kong

Symposium Support

Enli Technology Co., LTD

APL Energy | AIP Publishing

Session Chairs

So Min Park
Lina Quan

In this Session

Interstitial Defect Relaxation DFT Study of Lead Halide Perovskites

Water-Assisted Morphology and Crystal Engineering of Hybrid Organic-Inorganic Halide Perovskite: Implications for Optoelectronic Properties

Self-Leveling Inks for Engineering Large Area Uniformity in High-Performance Flexography-Printed Perovskite Solar Cells

Towards Highly Efficient Fully Evaporated Perovskite/Si Tandem Solar Cells

The Outstanding Role of Dielectricity in Hybrid Solar Cell Absorbers

Controlling The Crystallization of Pure Bromide Quasi-2-Dimensional Perovskite Crystals for High Efficiency Pure-Blue Light-Emitting Diodes

Compositional Engineering of Single-Crystal Perovskite for Highly Efficient Photovoltaics

Atomistic Origin of Transparent Absorption Spectra of Halide Perovskites

Exploring a Novel Family of Conjugated Polymers for High Efficiency and Thermally Stable Perovskite Solar Cells

Charge Transfer Doping of Ruddlesden–Popper Metal–Halide Perovskites via Bulk Incorporation of Organic Molecular Dopants

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Publishing Alliance

MRS publishes with Springer Nature