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1.北京理工大学 光电学院, 北京 100081
2.伦敦大学国王学院 物理系, 英国 伦敦 WC2R 2LS
Received:10 September 2025,
Revised:2025-10-13,
Published:05 January 2026
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HUANG Dengming, LIU Zheng, JIANG Ting, et al. Polarized luminescence properties of (Ph4P)2SbCl5 nanocrystals/PVDF composite fiber film[J]. Chinese Journal of Liquid Crystals and Displays, 2026, 41(1): 26-34. DOI: 10.37188/CJLCD.2025-0185. CSTR: 32172.14.CJLCD.2025-0185.
具有偏振发光特性的新型材料在显示器件中具有易集成、低能耗等优势,有望取代传统偏振片实现器件的小型化。非铅金属卤化物作为一类新型发光材料,具有低毒性、带隙可调、荧光量子产率高、可溶液加工等显著优势,在照明与显示领域具有重要潜在应用价值。本文以锑基有机-无机杂化非铅金属卤化物为材料体系,采用静电纺丝技术原位制备了具有偏振发光特性的(Ph
4
P)
2
SbCl
5
纳米晶/聚偏氟乙烯(PVDF)复合纤维薄膜。透射电子显微镜表征结果表明,(Ph
4
P)
2
SbCl
5
纳米晶/PVDF复合纤维中(Ph
4
P)
2
SbCl
5
呈纳米棒状,直径约为30 nm,且沿纤维轴向分布。(Ph
4
P)
2
SbCl
5
纳米晶/PVDF复合薄膜具有均匀的橙红光发光,发光峰位于600 nm处,偏振度可达0.5,并且荧光量子产率(photoluminescence quantum yield, PLQY)可达58.
7%。分析得出,复合纳米纤维的高偏振发射源于发光中心的定向跃迁偶极矩及PVDF基质的介电限域效应。最后,以该复合纤维薄膜作为荧光转换层、紫外发光二极管(light-emitting diodes, LED)芯片作为激发源制备了荧光转换型橙红光LED器件。本文所制备的(Ph
4
P)
2
SbCl
5
/PVDF偏振发光复合纳米纤维薄膜有望应用于新型显示器件。
Novel materials with polarized luminescence characteristics have the advantages of easy integration and low energy consumption in the field of display, and are expected to replace traditional polarizers to achieve miniaturization of devices. As a new type of luminescent material, lead-free metal halides have significant advantages such as low toxicity, adjustable band gap, high photoluminescence quantum yield (PLQY), and solution processing, thus showing important potential applications in the field of display. In this paper, (Ph
4
P)
2
SbCl
5
nanocrystals/PVDF (polyvinylidene fluoride) composite fiber films with polarized luminescence properties were prepared in situ by electrospinning using antimony-based organic-inorganic hybrid lead-free metal halides as the material system. Transmission electron microscope(TEM) results showed that (Ph
4
P)
2
SbCl
5
nanocrystals in the (Ph
4
P)
2
SbCl
5
/PVDF composite film exhibited nanorod morphology with a diameter of about 30 nm and distributed along the fiber axis. The (Ph
4
P)
2
SbCl
5
nanocrystals/PVDF composite film exhibits uniform orange-red luminescence with an emission peak located at 600 nm, with a degree of polarization of 0.5, and the PLQY reaches 58.7%. The high polarized emission of the composite nanofiber film originates from the oriented transition dipole moment of the luminescent centers and the dielectric confinement effect of the PVDF matrix. Finally, a fluorescence-conversion-type orange-red LED device was fabricated using this composite nanofiber film as the fluorescence conversion layer and an ultraviolet light-emitting diode(UV LED) chip as the excitation source. T
he as-prepared (Ph
4
P)
2
SbCl
5
/PVDF polarized luminescence composite nanofiber film demonstrates promising potential for application in new display devices.
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