Nemati Bideh Babak, Shahroosvand Hashem, Sousaraei Ahmad, Cabanillas-Gonzalez Juan
Group for Molecular Engineering of Advanced Functional Materials (GMA),Chemistry Department, University of Zanjan, Zanjan, Iran.
Madrid Institute for Advanced Studies in Nanoscience, IMDEA Nanociencia, Calle Faraday 9, Ciudad Universitaria de Cantoblanco, 28049, Madrid, Spain.
Sci Rep. 2019 Jan 18;9(1):228. doi: 10.1038/s41598-018-36420-1.
We report on an organic electroluminescent device with simplified geometry and emission in the red to near infrared (NIR) spectral region which, has the lowest turn-on voltage value, 2.3 V, among light emitting electrochemical cells (LEECs). We have synthesized and characterized three novel ruthenium π-extended phenanthroimidazoles which differ on their N^N ligands. The use of dimethyl electron donating groups along with the π-extended phenanthroimidazole moiety promotes ambipolar transport thereby avoiding the use of additional charge transport layers. Furthermore, a facile cathode deposition method based on transfer of a molten alloy (Ga:In) on top of the active layer is deployed, thus avoiding high vacuum thermal deposition which adds versatile assets to our approach. We combine ambipolar charge transport organic complex design and a simple ambient cathode deposition to achieve a potentially cost effective red to NIR emitting device with outstanding performance, opening new avenues towards the development of simplified light emitting sources through device optimization.
我们报道了一种具有简化几何结构且在红色至近红外（NIR）光谱区域发光的有机电致发光器件，该器件在发光电化学电池（LEEC）中具有最低的开启电压值，为2.3 V。我们合成并表征了三种新型的钌π-扩展菲咯咪唑，它们在N^N配体上有所不同。沿着π-扩展菲咯咪唑部分使用供电子的二甲基基团促进了双极性传输，从而避免了使用额外的电荷传输层。此外，采用了一种基于在活性层顶部转移熔融合金（Ga:In）的简便阴极沉积方法，从而避免了高真空热沉积，这为我们的方法增添了多种优势。我们将双极性电荷传输有机配合物设计与简单的环境阴极沉积相结合，以实现具有出色性能的潜在低成本的红色至近红外发光器件，通过器件优化为简化发光源的开发开辟了新途径。
