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Stable and High-Efficiency Perovskite Light-Emitting Diodes 

Light-emitting diodes (LEDs), which emit light by a solid-state process called electroluminescence, are considered as the most promising energy-efficient technology for future lighting and display. It has been demonstrated that optimal use of LEDs could significantly reduce the world’s electricity use for lighting from 20% to 4%. However, current LED technologies typically rely on expensive high-vacuum manufacturing processes, hampering their widespread applications. Therefore, it is highly desirable to develop low-cost LEDs based on solution-processed semiconductors. 

A superstar in the family of solution-processed semiconductors is metal halide perovskites, which have shown great success in photovoltaic applications during the past few years. The same perovskites can also been applied in LEDs. Despite being at an early stage of development with associated challenges, metal halide perovskites provide great promise as a new generation of materials for low-cost LEDs.

This project aims to develop high-efficiency and stable perovskite LEDs based on solution-processed perovskites. Two different classes of low-dimensional perovskites, i.e. perovskite multi-layer quantum wells (organometal hybrid) and perovskite nanocrystals (inorganic), will be investigated independently. These new perovskites materials will then be coupled with novel interface engineering to fabricate perovskite LEDs with the performance beyond the state of the art. At the core of the research is the synthesis of new perovskite nanostructures, combined with advanced spectroscopic characterization and device development. This project combines recent advances in perovskite optoelectronics and low-dimensional materials to create a new paradigm for perovskite LEDs. This research will also lead to the development of new perovskites materials, which will serve future advances in photovoltaics, transistors, lasers, etc.

Professor Feng Gao

Linköping University

Email: feng.gao@liu.se

Organic and perovskite semiconductors for energy technologies. ERC Starting Grantee in 2016; Wallenberg Academy Fellow in 2017; SSF Future Research Leader in 2020; Tage Erlander Prize (awarded by the Royal Swedish Academy of Sciences) in 2020.

Pulication lists

Journal of Materials Chemistry C

Efficient perovskite light-emitting diodes based on a solution-processed tin dioxide electron transport laye


Chemical Communications

Room-temperature film formation of metal halide perovskites on n-type metal oxides: the catalysis of ZnO on perovskite


Advanced Materials

High‐Quality Ruddlesden–Popper Perovskite Films Based on In Situ Formed Organic Spacer Cations



Blue perovskite light-emitting diodes: progress, challenges and future directions



Efficient and Tunable Electroluminescence from In Situ Synthesized Perovskite Quantum Dots


Advanced Optical Materials

Efficient CsPbBr3 Perovskite Light-Emitting Diodes Enabled by Synergetic Morphology Control


Israel Journal of Chemistry

Metal Doping/Alloying of Cesium Lead Halide Perovskite Nanocrystals and their Applications in Light‐Emitting Diodes with Enhanced Efficiency and Stability


Nature Photonics

Rational molecular passivation for high-performance perovskite light-emitting diodes


Nature Communications

Ultrafast long-range spin-funneling in solution-processed Ruddlesden–Popper halide perovskites


Nature Communications

Unveiling the synergistic effect of precursor stoichiometry and interfacial reactions for perovskite light-emitting diodes


Journal of Photonics for Energy

Efficient light-emitting diodes based on in-situ self-assembled perovskite nanocrystals


Advanced Materials

High Performance and Stable All-Inorganic Metal Halide Perovskite-Based Photodetectors for Optical Communication Applications


Advanced Optical Materials

Optical Energy Losses in Organic-Inorganic Hybrid Perovskite Light-Emitting Diodes


The Journal of Physical Chemistry Letters

Organic–Inorganic Hybrid Ruddlesden–Popper Perovskites: An Emerging Paradigm for High-Performance Light-Emitting Diodes


Nature Communications

Perovskite-molecule composite thin films for efficient and stable light-emitting diodes


Nature Electronics

Bidirectional optical signal transmission between two identical devices using perovskite diodes


Nature Communications

Intermediate-phase-assisted low-temperature formation of γ-CsPbI3 films for high-efficiency deep-red light-emitting devices


Advanced Functional Materials

Dynamic Redistribution of Mobile Ions in Perovskite Light‐Emitting Diodes



Critical role of additive-induced molecular interaction on the operational stability of perovskite light-emitting diodes


The Journal of Physical Chemistry Letters

Impact of Amine Additives on Perovskite Precursor Aging: A Case Study of Light-Emitting Diodes


The Journal of Physical Chemistry Letters

Color-Stable Blue Light-Emitting Diodes Enabled by Effective Passivation of Mixed Halide Perovskites


Advanced Optical Materials

Aligning Transition Dipole Moment toward Light Amplification and Polarized Emission in Hybrid Perovskites


Nature Communications

Manipulating crystallization dynamics through chelating molecules for bright perovskite emitters


Nature Communications

Mobile ions determine the luminescence yield of perovskite light-emitting diodes under pulsed operation


Advanced Materials

Spacer Cation Alloying in Ruddlesden–Popper Perovskites for Efficient Red Light-Emitting Diodes with Precisely Tunable Wavelengths