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<p>Organic-inorganic hybrid antimony halides are emerging emitters for solution-processed light-emitting diodes. However, achieving high-efficiency electroluminescence remains challenging resulting from the non-radiative recombination within emitters and inferior charge transport within device. Here, we develop an organic cation engineering to design a carbazole-functionalized triphenyl(9-ethyl-9H-carbazol-3-yl) phosphonium (TPPEtCz<sup>+</sup>), which enables a (TPPEtCz)<sub>2</sub>Sb<sub>2</sub>Br<sub>8</sub> film with good luminescence and achieves an improved charge transport within device. The TPPEtCz<sup>+</sup> facilitates strong hydrogen bonding with the [Sb<sub>2</sub>Br<sub>8</sub>]<sup>2−</sup> species and dichloromethane solvent, resulting in a more complete crystal restructuring, thus improving the quality of films. Moreover, non-covalent <i>π–π</i> interactions between carbazole moieties of (TPPEtCz)<sub>2</sub>Sb<sub>2</sub>Br<sub>8</sub> and benzimidazole moieties of electron-transport TPBi modify the interfacial contact that promotes electron transport and injection. Consequently, our light-emitting diodes reach a peak external quantum efficiency of 19.4% and half-lifetime of 10,190 min at 100 cd m<sup>−2</sup>. These discoveries provide critical insights into the cation design of hybrid devices that are promising for practical applications.</p>

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Efficient solution-processed light-emitting diodes based on organic-inorganic hybrid antimony halides

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年1月17日

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  • Zhuangzhuang Ma,
  • Weihong Chu,
  • Qiming Peng,
  • Qicong Zhou,
  • Xinzhen Ji,
  • Shuailing Lin,
  • Jingmin Wang,
  • Xiuyong Li,
  • Meng Wang,
  • Mengyao Zhang,
  • Dongyang Zhu,
  • Zhenghao Xia,
  • Niannian Wang,
  • Dongwen Yang,
  • Ying Liu,
  • Yanbing Han,
  • Linyuan Lian,
  • Mochen Jia,
  • Xu Chen,
  • Jibin Zhang,
  • Di Wu,
  • Xinjian Li,
  • Chongxin Shan,
  • Jianpu Wang,
  • Zhifeng Shi

摘要

Organic-inorganic hybrid antimony halides are emerging emitters for solution-processed light-emitting diodes. However, achieving high-efficiency electroluminescence remains challenging resulting from the non-radiative recombination within emitters and inferior charge transport within device. Here, we develop an organic cation engineering to design a carbazole-functionalized triphenyl(9-ethyl-9H-carbazol-3-yl) phosphonium (TPPEtCz+), which enables a (TPPEtCz)2Sb2Br8 film with good luminescence and achieves an improved charge transport within device. The TPPEtCz+ facilitates strong hydrogen bonding with the [Sb2Br8]2− species and dichloromethane solvent, resulting in a more complete crystal restructuring, thus improving the quality of films. Moreover, non-covalent π–π interactions between carbazole moieties of (TPPEtCz)2Sb2Br8 and benzimidazole moieties of electron-transport TPBi modify the interfacial contact that promotes electron transport and injection. Consequently, our light-emitting diodes reach a peak external quantum efficiency of 19.4% and half-lifetime of 10,190 min at 100 cd m−2. These discoveries provide critical insights into the cation design of hybrid devices that are promising for practical applications.