Novel n-Doping Approaches for Organic Semiconductors

掺杂有机层是许多新器件概念的关键。特别是，有机光伏（OPV）需要高效的掺杂材料，这是多结电池中传输层和复合接触所必需的。然而，获得具有优异电子性能的n掺杂剂仍然具有挑战性。高电离势和强掺杂能力以及空气稳定性和可加工性是关键要求。我们已经确定了三种新的物质类别，它们具有潜在的成本效益和可扩展的合成途径，并结合基于dft计算的极有希望的电离势：环丙烯亚胺、茚和戊烯。新材料将与行业合作伙伴Heliatek GmbH密切合作，在单层和太阳能电池设备方面的性能方面进行广泛的表征，以有效开发新材料的应用潜力。

Doped organic layers are crucial for many novel device concepts. In particular, organic photovoltaics (OPV) require efficient doping materials that are needed for transport layers and the recombination contact in multi-junction cells. However, the access to n-dopants with superior electronic properties remains challenging. A high ionization potential and strong doping ability in connection with airstability and processability represent the key requirements. We have identified three novel substance classes that offer potentially cost-effective and scalable synthetic access in conjunction with highly promising ionization potentials based on DFT-calculations: cyclopropenyl imines, indacenes and pentalenes. The new substances will be extensively characterized in terms of their performance in single layers and solar cell device in close collaboration with the industry partner Heliatek GmbH for an efficient exploitation of the application potential of the new materials.