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Efficient and Stable Blue Quasi-2D Halide Perovskite Light-Emitting Diodes

Project description

High-efficiency blue light-emitting diodes based on halide perovskites

Metal-halide perovskites are a new generation of semiconductor materials that have been widely applied in numerous optoelectronic devices including perovskite light-emitting diodes (PeLEDs). The external quantum efficiencies (EQEs) of green and red emissive PeLEDs have exceeded 20 % which is comparable to organic LEDs at the lab scale. However, the performance of blue PeLED lags behind that of its counterparts (i.e. green and red PeLEDs) due to poor colour stability of blue emission which leads poor device performance and stability. The EU-funded Blue-PeLEDs project will work on improving the efficiency and colour stability of blue PeLED by designing quasi-2D perovskite materials. Further, these will be used to fabricate state-of-the-art efficient blue PeLEDs.


Within eight years, metal halide perovskite materials become a new class of semiconducting materials for optoelectronic device application. Their unique and attractive optoelectronic properties, e.g. high crystallinity, low-cost, solution processable with large area deposition, direct band gap nature, low defect density, high color purity (narrow PL emission), tunable optical bandgap, long diffusion length, and balance and high charge carrier mobility. These properties make them attractive and potential candidates for light emitting diodes (LEDs) also. The green and red emissive perovskite-based LEDs efficiency reached ~10%, which is equal to the organic light emitting diodes (OLEDs) at lab scale. But still, blue emissive PeLED efficiency is lower as compared to green and red PeLEDs. The poor stability, poor charge balance, and low photoluminescent are major problems to limit blue PeLED efficinecy.
In this proposal, I aims to address these challenges and demonstrate efficient and stable blue PeLED. The research work will be organized according to the following key objectives. 1) Design of blue emissive quasi 2D perovskite material by first-principles calculation (with the support of host organization), b) Deposition of high quality and pinhole-free blue quasi 2D thin film by using various deposition method and their characterization, and c) Fabrication of efficient and stable blue emissive quasi 2D PeLED beyond state of the art, by using device engineering and device physics investigation. This project provides basic scientific knowledge of quasi 2D perovskite materials for blue emissive PeLEDs. The expected results of this project are bandgap engineering of quasi 2D perovskite materials for blue emission with good optoelectronic properties, efficient and stable blue PeLED. Also, I will learn the synthesis of quasi 2D materials from the host organization that will be improved my interdisciplinary knowledge and research skills. The efficient blue PeLED is us


Net EU contribution
€ 203 852,16
Campus valla
581 83 Linkoping

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Östra Sverige Östra Mellansverige Östergötlands län
Activity type
Higher or Secondary Education Establishments
Other funding
€ 0,00