基于四齿铂配位构型的圆偏振发光材料构筑及其深红光/近红外电致发光研究

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中图分类号：0482.31 文献标识码：ADOI：10.37188/CJL.20250165 CSTR：32170.14.CJL.20250165

Abstract：Inthiswork，spiro-chiral electroluminescent emiter（Pt-TPA-δ-Cbl）wasconstructed viaa steric hindrance strategyat the terminal acceptorofa tetradentate Pt（I）coordination system.Optically pure enantiomers（PPt-TPA-δ-Cbl and M -Pt-TPA-δ-Cbl） were successfully isolated through chiral chromatographic separation. The molecularstructures，photophysical properties，and device performance weresystematically investigatedusing combined theoreticaland experimentalapproaches，elucidating structure-propertyrelationships.Thecomplexes exhibit excellent thermal stability（decomposition temperature >450C ）and intense deep red/near-infrared（DR/NIR）emission （ λem =698 nm）．Remarkably，the chiral enantiomers demonstrate strong circularly polarizedphotoluminescence （CPL）in both solution and thin-film states，with photoluminescence dissymmetry factors （ |gPL| ）reaching 10-3 Vacuum-deposited devices achieve NIR electroluminescence at 685 nm，delivering amaximum externalquantum efficiency（ EQEmax ）of over17. 6% ，ranking among the highest reported values for Pt（ II）-based deep-red/NIR electroluminescent systems.The solution-processd circularlypolarized phosphorescent organic light emiting diodes（CPOLEDs）exhibit an electroluminescence dissymmetry factor（ ∣gEL∣ ）of ～10-4 . This work provides a strategic design paradigmand theoreticalfoundation fordeveloping high-performance deep-red/NIR luminescent materials and chiral electroluminescent devices.

Key Words：Ptcomplexes；circularly polarized luminescence;spiro-chirality；deep-red to near-infrared（NIR）

1引言

有机电致发光二极管（OLEDs）作为一种新型的平板显示器件，由于其诸多的优点，如自发光、高柔性、高分辨率、高效率、反应时间快、使用温度范围宽、低驱动电压以及低能耗等，在平面显示和照明等领域备受国内外学术界和工业界的关注。（剩余16949字）