使用双坐标黄金 (I) 复合体实现长波长电发光:克服能量差距法则
Sreenivas Avula1, Byung Hak Jhun1, Unhyeok Jo2
1Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul, 03722, Republic of Korea.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|November 12, 2023
概括
研究人员开发了新的金复合物,用于有机发光器件 (OLED) 的高效长波长发射. 这些发射器即使在近红外也保持了高光发光量子产量 (Φ),克服了以前的限制.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 物理 物理学 物理
背景情况:
- 双坐标硬币金属复合体对高效的有机发光器件 (OLED) 是有前途的.
- 从这些复合体中实现高效的长波长电发光是具有挑战性的.
- 现有的Au(I) 复杂排放者在低能耗排放地区面临限制.
研究的目的:
- 研究分子设计策略,以增强光发光量子产量 (Φ) 在Au (I) 复杂发射器中.
- 开发两个坐标的Au (I) 复合体,以有效地发射长波长和近红外辐射.
- 了解控制排放效率的光物理机制.
主要方法:
- 通过不同的胺联体合成了一系列双坐标Au (I) 复合体.
- 测量 photoluminescence 峰值波长和 photoluminescence 量子收益率 (Φ).
- 进行了量子化学计算和光物理分析.
主要成果:
- 开发了具有光发发光峰波长跨越533-750纳米的Au (I) 复合体.
- 在近红外辐射区域达到高达10%的Φ值.
- 证明了辐射控制克服了能量差距定律,通过增加孔和电子分布 (Sr(r)) 的重叠增强了能量差距定律.
- 发现的Sr (r) 随着孔分布中心离子和氨基联体的原子之间的距离而增加.
- 制造的多层OLED具有比以前的硬币制造金属复杂设备更好的性能.
结论:
- 具有胺配体的双坐标Au ((I) 复合体的分子设计使得高效的长波长和近红外电解发光成为可能.
- 受到激发状态电荷分布重叠的影响的辐射控制是克服能量差距定律的关键.
- 这些发现为具有定制排放特性的先进OLED铺平了道路.
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