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<p>Here, we report naphthalene-fused boron-sulfur-nitrogen-based multi-resonance (MR) dendrimer (<b>TCz-DBSN</b>) with efficient narrowband pure-green emission by incorporating two second-generation carbazole dendrons into a boron-sulfur-nitrogen-doped polycyclic skeleton. It is found that the fused naphthalene moiety can extend conjugation to red-shift emission spectra into the pure-green region at 517 nm, and enhance oscillator strength to boost photoluminescence quantum yield up to 99%. Meanwhile, compared to its counterpart without carbazole dendron, <b>TCz-DBSN</b>, containing two carbazole dendrons, not only exhibits much better solubility in common organic solvents favorable for the fabrication of solution-processed devices, but also reveals lower singlet-state energy and a smaller singlet-triplet energy gap to accelerate the reverse intersystem crossing process. As a result, solution-processed organic light-emitting diodes (OLEDs) using <b>TCz-DBSN</b> as emitter exhibit pure-green electroluminescence at 530 nm with full width at half-maximum of 38 nm and maximum external quantum efficiency of 25.0%, making the dendrimer an efficient MR emitter for solution-processed pure-green narrowband OLED devices.</p>

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Naphthalene-fused boron-sulfur-nitrogen-based multi-resonance dendrimers for efficient solution-processed pure-green OLEDs

  • 期刊论文

  • 发表日期：

    2026年7月16日

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  • Rui Zhong,
  • Xingdong Wang,
  • Lei Zhao,
  • Shumeng Wang,
  • Hui Tong,
  • Shiyang Shao,
  • Lixiang Wang

摘要

Here, we report naphthalene-fused boron-sulfur-nitrogen-based multi-resonance (MR) dendrimer (TCz-DBSN) with efficient narrowband pure-green emission by incorporating two second-generation carbazole dendrons into a boron-sulfur-nitrogen-doped polycyclic skeleton. It is found that the fused naphthalene moiety can extend conjugation to red-shift emission spectra into the pure-green region at 517 nm, and enhance oscillator strength to boost photoluminescence quantum yield up to 99%. Meanwhile, compared to its counterpart without carbazole dendron, TCz-DBSN, containing two carbazole dendrons, not only exhibits much better solubility in common organic solvents favorable for the fabrication of solution-processed devices, but also reveals lower singlet-state energy and a smaller singlet-triplet energy gap to accelerate the reverse intersystem crossing process. As a result, solution-processed organic light-emitting diodes (OLEDs) using TCz-DBSN as emitter exhibit pure-green electroluminescence at 530 nm with full width at half-maximum of 38 nm and maximum external quantum efficiency of 25.0%, making the dendrimer an efficient MR emitter for solution-processed pure-green narrowband OLED devices.