Hansen Per-Anders, Svendsen Joachim, Nesteng Hanne, Nilsen Ola
Department of Chemistry, Centre for Materials Science and Nanotechnology, University of Oslo Sem Sælandsvei 26 0371 Oslo Norway
RSC Adv. 2022 Jun 20;12(28):18063-18071. doi: 10.1039/d2ra03360g. eCollection 2022 Jun 14.
Atomic layer deposition offers a unique set of design possibilities due to the vast range of metal and organic precursors that can be used and combined. In this work, we have combined lanthanides with aromatic aids as strongly absorbing sensitizers to form highly luminescent thin films. Terephthalic acid is used as a base sensitizer, absorbing shorter wavelengths than 300 nm. The absorption range is extended towards the near-UV and blue range by increasing the aromatic system and adding functional groups that have strong red-shifting effects. While terbium and europium provide green and red emission, yttrium allows emission from the sensitizer itself spanning the whole color range from purple, blue and green to red. Many organic dye molecules show very high luminescence quantum yields and several of the molecules and materials investigated in this work show bright luminescence.
由于可使用和组合的金属和有机前驱体种类繁多，原子层沉积提供了一系列独特的设计可能性。在这项工作中，我们将镧系元素与芳香助剂作为强吸收敏化剂相结合，以形成高发光薄膜。对苯二甲酸用作基础敏化剂，吸收波长小于300nm的光。通过增加芳香体系并添加具有强烈红移效应的官能团，吸收范围向近紫外和蓝光范围扩展。铽和铕发出绿色和红色光，而钇则使敏化剂本身发出从紫色、蓝色、绿色到红色的全色范围光。许多有机染料分子表现出非常高的发光量子产率，并且在这项工作中研究的几个分子和材料都表现出明亮的发光。
