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<p>Platinum complexes are one of the most promising emitters for organic light-emitting diodes (OLEDs) and they have been studied for decades. However, it is still challenging to realize high-performance solution-processed OLEDs by using the platinum complex as an emissive dopant. Herein, a nonplanar terdentate [Pt(N^C^N)Cl] emitter (<b>Pt1</b>) with good solubility and film-forming ability, ultrahigh photoluminescence quantum yield (98% in PMMA film), and short excited-state lifetime (1.5 µs in solution) is presented to achieve this goal. This complex is designed and synthesized by using a nonplanar ligand strategy. Solution-processed OLEDs of <b>Pt1</b> are successfully fabricated to show a maximum external quantum efficiency (EQE<sub>max</sub>) of 16.14%, a maximum current efficiency (CE<sub>max</sub>) of 46.36 cd A<sup>−1</sup>, a maximum luminance (<i>L</i><sub>max</sub>) of 13990 cd m<sup>−2</sup>, and operating half-lifetime (LT<sub>50</sub>) of 288 min, respectively, representing the highest performance recorded so far based on the terdentate platinum complexes. More importantly, the large-area (144 mm<sup>2</sup>) OLEDs of <b>Pt1</b> with high EQE<sub>max</sub> of 10.28% and uniform luminance of 8076 cd m<sup>−2</sup> have been achieved, indicating a high potential of <b>Pt1</b> for commercial applications.</p>

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High-performance solution-processed OLEDs utilizing a nonplanar terdentate chloroplatinum emitter

  • 期刊论文

  • 发表日期：

    2025年3月13日

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  • Si-Hai Wu,
  • Jian-Cheng Chen,
  • Zhe Zhang,
  • Ren-Hui Zheng,
  • Hui-E. Peng,
  • Zifeng Zhao,
  • Dian-Xue Ma,
  • Zhong-Qiu Li,
  • Jiang-Yang Shao,
  • Yu-Wu Zhong

摘要

Platinum complexes are one of the most promising emitters for organic light-emitting diodes (OLEDs) and they have been studied for decades. However, it is still challenging to realize high-performance solution-processed OLEDs by using the platinum complex as an emissive dopant. Herein, a nonplanar terdentate [Pt(N^C^N)Cl] emitter (Pt1) with good solubility and film-forming ability, ultrahigh photoluminescence quantum yield (98% in PMMA film), and short excited-state lifetime (1.5 µs in solution) is presented to achieve this goal. This complex is designed and synthesized by using a nonplanar ligand strategy. Solution-processed OLEDs of Pt1 are successfully fabricated to show a maximum external quantum efficiency (EQEmax) of 16.14%, a maximum current efficiency (CEmax) of 46.36 cd A−1, a maximum luminance (Lmax) of 13990 cd m−2, and operating half-lifetime (LT50) of 288 min, respectively, representing the highest performance recorded so far based on the terdentate platinum complexes. More importantly, the large-area (144 mm2) OLEDs of Pt1 with high EQEmax of 10.28% and uniform luminance of 8076 cd m−2 have been achieved, indicating a high potential of Pt1 for commercial applications.