DataVXAdvanced MaterialsPaper
journal article·2024-01Open access

Highly Bright and Stable Lead‐Free Double Perovskite White Light‐Emitting Diodes

Shilin Jin, He Yuan, Tao Pang, Manjia Zhang, Junyang Li, Yuanhui Zheng, Tianmin Wu, Ruidan Zhang, Zhibin Wang, Daqin Chen

Advanced Materials· Volume 36· Issue 4
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Source abstract

Abstract

Abstract Lead‐free double perovskites (DPs) are emerging highly stable emitters with efficient broadband self‐trapped exciton (STE) photoluminescence (PL), but their low electroluminescent (EL) efficiency is a critical shortcoming. This work promotes the external quantum efficiency (EQE) and luminance of DP‐based white light‐emitting diode (wLED) with a normal device structure to 0.76% and 2793 cd m−2 via two modifications: This work prevents the formation of adverse metallic silver, spatially confined STE, and lowers local site symmetry in Cs2Na0.4Ag0.6In0.97Bi0.03Cl6 DP by terbium doping; and this work develops a guest–host strategy to improve film morphology, reduce defect density, and increase carrier mobility. These alterations cause substantial increase in STE radiative recombination and charge injection efficiency of perovskite layer. Finally, pure white EL with ideal color coordinates of (0.328, 0.329) and a record‐breaking optoelectronic performance is achieved by introducing additional green carbon dots in LED to fill the deficient green component.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Organic Light-Emitting Diodes Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

College of Physics and Energy Fujian Normal University Fuzhou Fujian 350117 P. R. China

Huzhou Key Laboratory of Materials for Energy Conversion and Storage College of Science Huzhou University Huzhou Zhejiang 313000 China

Fujian Science and Technology Innovation Laboratory for Optoelectronic Information Fuzhou Fujian 350116 P. R. China

College of Chemistry Fuzhou University Fuzhou Fujian 350116 P. R. China

Key Laboratory of Opto‐Electronic Science and Technology for Medicine of Ministry of Education College of Photonic and Electronic Engineering Fujian Normal University Fuzhou Fujian 350117 China

Fujian Provincial Collaborative Innovation Center for Advanced High‐Field Superconducting Materials and Engineering Fujian Normal University Fuzhou Fujian 350117 P. R. China

Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy Storage Fujian Normal University Fuzhou Fujian 350117 P. R. China

Funding

Natural Science Foundation of Fujian Province · National Natural Science Foundation of China · National Key Research and Development Program of China

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