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Molecularly Engineered Near-Infra red Light-Emitting Electrochemical Cells

机译：分子化工改的近红外线发光电化学电影细胞

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摘要

The development of near-infrared (NIR) luminescent materials has emerged as a promising research field with important applications in solid-state lighting (SSL), night-vision-readable displays, and the telecommunication industry. Over the past two decades, remarkable advances in the development of light-emitting electrochemical cells (LECs) have stunned the SSL community, which has in turn driven the quest for new classes of stable, more efficient NIR emissive molecules. In this review, an overview of the state of the art in the field of near-infrared light-emitting electrochemical cells (NIR-LEC) is provided based on three families of emissive compounds developed over the past 25 years: i) transition metal complexes, ii) ionic polymers, and iii) host-guest materials. In this context, ionic and conductive emitters are particularly attractive since their emission can be tuned via molecular design, which involves varying the chemical nature and substitution pattern of their ancillary ligands. Herein, the challenges and current limitations of the latter approach are highlighted, particularly with respect to developing NIR-LECs with high external quantum efficiencies. Finally, useful guidelines for the discovery of new, efficient emitters for tailored NIR-LEC applications are presented, together with an outlook towards the design of new NIR-SSL materials.
机译：近红外线（NIR）发光材料的发展是一个有前途的研究领域，具有固态照明（SSL），夜视可读性显示器和电信行业的重要应用。在过去的二十年中，发光电化学电影细胞（LECS）的显着进展令人惊叹的是SSL社区，该社区又推动了对新类稳定，更高效的NIR发光分子的追求。在该审查中，基于在过去25年中发育的三个发射化合物的三个家庭提供了近红外发光电化学电化学电池（NIR-LEC）领域的概述：I）过渡金属配合物，II）离子聚合物和III）宿主材料。在这种情况下，离子和导电发射器特别有吸引力，因为它们可以通过分子设计调节它们，这涉及改变其辅助配体的化学性质和替代模式。在此，突出了后一种方法的挑战和当前限制，特别是对于具有高外部量子效率的NIR-LEC。最后，提出了用于发现新的高效发射器的有用指南，用于量身定制的NIR-LEC应用程序，以及对新的NIR-SSL材料设计的展望。

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