journal article·2025-07Open access

Minimizing Interfacial Energy Losses with Carbon Dot Bifacial Modification Layers for High‐Efficiency and Stable Perovskite LEDs

Zhibin Wang, Song Zheng, Naizhong Jiang, Hailiang Huang, Ximing Wu, Ruidan Zhang, Yang Lin, Longqi Lin, Xin Zhou, Rui Zeng, Tao Pang, Tianmin Wu, Feng Huang, Daqin Chen

Advanced Functional Materials· Volume 35· Issue 28

Abstract

Abstract Perovskite light‐emitting diodes (PeLEDs) have reached near‐unity photoluminescent quantum yields (PLQYs), but further improvements in electroluminescent efficiency are constrained by interfacial energy losses between the emissive layer and charge transport layers. In this study, multifunctional carbon dot organic frameworks (CDOFs) are introduced as a dual‐interface modification material for perovskite layer. This approach effectively passivates both the upper and buried interfaces, boosting the PLQY to nearly 100% and enabling an external quantum efficiency of 28.0%. The CDOFs also facilitate balanced charge injection, achieving a low turn‐on voltage of only 1.9 V, significantly below the bandgap voltage. Additionally, the exceptional defect passivation imparted by CDOFs significantly bolsters structural stability, achieving a T50 operational lifetime of 81.7 min at an initial ultrahigh luminance of 10 000 cd m−2, with no detectable Joule heating. This study underscores the potential of CDOFs in significantly advancing PeLED performance.
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Research context

OpenAlex topics: Perovskite Materials and Applications · ZnO doping and properties · Quantum Dots Synthesis And Properties

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

Affiliations

College of Physics and Energy Fujian Normal University Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials Fuzhou 350117 China

School of Chemistry and Chemical Engineering Frontiers Science Center for Transformative Molecules In‐situ Center for Physical Science Center of Hydrogen Science Shanghai Jiao Tong University Shanghai 200240 China

Huzhou Key Laboratory of Materials for Energy Conversion and Storage College of Science Huzhou University Zhejiang Huzhou 313000 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 Fuzhou 350117 China

Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy Storage Fuzhou 350117 China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Fujian Province

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