journal article·2026-01Open access

Self‐Assembled Monolayers Facilitate Simultaneous Enhancements of External Quantum Efficiencies and Circularly Polarized Luminescence Dissymmetry Factors for Chiral Perovskite Red Spin‐Light Emitting Diodes

Linze Jiang, Guoshuai Zhang, Houzhi Chen, Xiangpeng Zhang, Chao Qian, Jing Li, Lidan Guo, Jinpeng Li, Shuaishuai Ding, Guankui Long, Chuang Zhang, Zhixiang Wei, Xiangnan Sun, Kai Wang

Advanced Science· Volume 13· Issue 3

Abstract

Abstract Stemming from the chirality‐induced spin‐orbit coupling (CISOC), the transfer of spin angular momenta to angular momenta of light can be realized by chiral hybrid perovskites (CHPs) for developing novel spin‐light emitting diodes (spin‐LEDs). The primary challenge lies in simultaneous enhancements for the electronic charge associated external quantum efficiencies (EQEs) and spin‐dependent dissymmetry factor of circularly polarized electroluminescence ( g EL ), which severely limits the high‐performance spin‐LEDs’ development. Herein, a self‐assembled monolayer (SAM) that acts as an interfacial layer between a nickel oxide (NiO x ) transport layer and a chiral perovskite emissive film has been adopted for red spin‐LED fabrications. An optimal EQE of 8.3% and g EL of 16.3% have been successfully achieved for the red circularly polarized electroluminescence (CPEL) at 725 nm. From the spin‐optoelectronic consideration, the well‐balanced EQE and g EL . These are attributed to remarkable fluorescence recombination lifetime improvements, ion migration suppressions, and trap density reductions. Notably, a two times greater spin lifetime (≈27.6 ps) has been obtained by comparing with a control sample (≈12.1 ps). Improved chiral‐induced spin‐orbit coupling (CISOC) strengths further elevate spin‐selective capacities, which consequently promote polarized spin current generation. This study unlocks the challenge and opens a new avenue for constructing high‐performance spin‐LEDs using the SAM nanotechnology.
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Research context

OpenAlex topics: Perovskite Materials and Applications · Organic Light-Emitting Diodes Research · 2D Materials and Applications

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

Affiliations

Key Laboratory of Luminescence and Optical Information Ministry of Education School of Physical Science and Engineering Beijing Jiaotong University Beijing 100044 P. R. China

Tangshan Research Institute of Beijing Jiaotong University Tangshan 063000 P. R. China

Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology Beijing 100190 P. R. China

Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China

State Key Laboratory of Advanced Materials for Intelligent Sensing Tianjin Key Laboratory of Molecular Optoelectronic Sciences Department of Chemistry Institute of Molecular Aggregation Science Tianjin University Tianjin 300072 P. R. China

Tianjin Key Lab for Rare Earth Materials and Applications School of Materials Science and Engineering National Institute for Advanced Materials Nankai University Tianjin 300350 P. R. China

Key Laboratory of Photochemistry Beijing National Laboratory for Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. China

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China · Tangshan Science and Technology Bureau · Fundamental Research Funds for the Central Universities

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