April 22 - 26, 2024
Seattle, Washington
May 7 - 9, 2024 (Virtual)

Event Supporters

2024 MRS Spring Meeting
EN10.02.08

Highly Efficient Perovskite Blue Light-Emitting Diodes

When and Where

Apr 22, 2024
5:30pm - 5:45pm
Room 347, Level 3, Summit

Presenter(s)

Samuel Stranks, University of Cambridge

Co-Author(s)

Jian Mao1,2,Samuel Stranks1

University of Cambridge1,Fudan University2

Abstract

Jian Mao1,2,Samuel Stranks1

University of Cambridge1,Fudan University2
Lead halide perovskite has attracted extensive attention during the past decade for applications in light-emitting diodes because of its wide emission tunability, high color purity, high quantum yield, and easy solution processibility. Despite the exciting progress of perovskite green, red, and near-infrared LEDs, fabrication of perovskite blue LEDs with high external quantum efficiency (EQE), high brightness, and high color purity remains a considerable challenge. Here, we report efficient perovskite blue LEDs with a world-record EQE of surpassing 22%, a peak luminance above 7000 cd/m<sup>2</sup>, and a full width at half maximum of 15 nm. Besides, the devices exhibit a stable electroluminescence spectrum at constant elevated current injection. This performance is achieved by carefully manipulating the growth of perovskite into thin films with homogeneous isolated grains, which not only improve the light outcoupling efficiency but also enhance the spectrum stability.

Keywords

luminescence

Symposium Organizers

Ivan Mora-Sero, Universitat Jaume I
Michael Saliba, University of Stuttgart
Carolin Sutter-Fella, Lawrence Berkeley National Laboratory
Yuanyuan Zhou, Hong Kong University of Science and Technology

Symposium Support

Silver
Journal of Energy Chemistry

Session Chairs

Tim Kodalle
Yuanyuan Zhou

In this Session