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Updated: Jan 26, 2026

Development of Efficient OLEDs from Solution Deposition
Published on: November 4, 2022
Enhancing Molecular Aggregations by Intermolecular Hydrogen Bonds to Develop Phosphorescent Emitters for
Xiaolong Yang1, Haoran Guo1, Xianbin Xu1
1MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Department of Chemistry School of Science Xi'an Jiaotong University Xi'an 710049 P. R. China.
Abstract:
Phosphorescent near-infrared (NIR) organic light-emitting devices (OLEDs) have drawn increasing attention for their promising applications in the fields such as photodynamic therapy and night-vision readable displays. Here, three simple phosphorescent Pt(II) complexes are synthesized, and their intermolecular interactions are investigated in crystals and neat films by X-ray single crystal diffraction and grazing-incidence wide-angle X-ray scattering, respectively. The photophysical properties, molecular aggregation (including Pt-Pt interaction), molecular packing orientation, and electron transport ability are all influenced by the strong intermolecular hydrogen bonds. Consequently, the nondoped OLEDs based on tBu-Pt and F-Pt show electroluminescent emissions in NIR region with the highest external quantum efficiencies of 13.9% and 16.7%, respectively.
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