DataVXACS NanoPaper
journal article·2025-04-08

Mitigation of Nonradiative Recombination by Reconfiguring Triplet Energy of Additive Toward Efficient Blue Perovskite Light-Emitting Diodes

Shuang-Qiao Sun, Qi Sun, Yating Cai, Zi-Qi Feng, Qi Zheng, Bochen Liu, Min Zhu, Tingting Shi, Liang-Sheng Liao, Yue-Min Xie, Shuit-Tong Lee, Man-Keung Fung

ACS Nano· Volume 19· Issue 13
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Source abstract

Abstract

The exceptional optoelectronic properties of metal halide perovskites, including enhanced color saturation and tunable emission wavelengths, render them highly potential candidates for fabricating perovskite light-emitting diodes (PeLEDs). However, blue PeLEDs underperform relative to their red and green counterparts due to substantial nonradiative recombination losses, particularly at the perovskite/electron transporting layer (ETL) interface. Here, we propose an effective energy management strategy aimed at boosting the efficiency of blue PeLEDs by the incorporation of a multifunctional interlayer, specifically 2,8-bis(diphenylphosphoryl)dibenzo[ b, d ]furan (PPF), at the perovskite/ETL interface. This approach involves the formation of robust P═O/Pb bonds between PPF and perovskite surface defects, thereby effectively mitigating trap-induced nonradiative recombination. Furthermore, the high triplet energy level of PPF inhibits triplet energy transfer from the perovskite to the ETL, leading to further reductions in energy loss. Consequently, the optimized blue PeLEDs exhibit a peak external quantum efficiency (EQE) of 15.1% (peak emission at 472 nm) with a 4-fold increased operational lifetime compared to the control PeLED. Additionally, utilizing blue PeLED units treated with PPF, we achieve a record EQE of 31.1% for hybrid perovskite/organic tandem white LEDs, which exhibit a high color rendering index of 85.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

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

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

Affiliations

Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM)

Soochow University

Institute of Organic Optoelectronics, Jiangsu Industrial Technology Research Institute (JITRI), 1198 Fenhu Dadao, Wujiang, Suzhou, Jiangsu 215200, P. R. China

Macau Institute of Materials Science and Engineering (MIMSE), MUST-SUDA Joint Research Center for Advanced Functional Materials, Zhuhai MUST Science and Technology Research Institute

Macau University of Science and Technology

Siyuan Laboratory, Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials Department of Physics

Jinan University

Jiangsu Key Laboratory of Advanced Negative Carbon Technologies

Funding

Collaborative Innovation Center of Suzhou Nano Science and Technology · China Postdoctoral Science Foundation · Fundo para o Desenvolvimento das Ci?ncias e da Tecnologia · Higher Education Discipline Innovation Project · Gusu Innovation and Entrepreneur Leading Talents · Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials, Soochow University

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