Organic light-emitting diodes (OLEDs) produced from metal complexes play an important role in modern electroluminescent devices. While OLEDs are being used in display various applications such as TVs, smartphones and wearables already, a drastic increase in the production volume in the next years is being expected as soon as OLED lighting applications and printed OLEDs hit the market. Given that thus far, phosphorescent iridium compounds are required to make these products, sustainability issues are imminent. To review viable alternatives, we highlight the current status of sustainable metal complexes with a special focus on copper and zinc complexes. Ligand structures and complex preparation were highlighted. We also briefly address features like cooperativity, chirality, and printing.

由金属络合物生产的有机发光二极管（OLED）在现代电致发光器件中起着重要作用。尽管OLED已被用于电视，智能手机和可穿戴设备等各种显示器中，但随着OLED照明应用和印刷OLED进入市场，预计明年的产量将急剧增加。鉴于到目前为止，制造这些产品需要磷光铱化合物，因此迫在眉睫的可持续性问题迫在眉睫。为了审查可行的替代方案，我们重点介绍了可持续金属配合物的现状，特别关注铜和锌配合物。强调了配体结构和复杂的制备方法。我们还将简要介绍诸如合作性，手性和打印之类的功能。