Kastner Julia, Tomarchio Flavia, Decorde Nicolas, Kehrer Matthias, Hesser Günter, Fuchsbauer Anita
Functional Surfaces and Nanostructures, Profactor GmbH, 4407 Steyr-Gleink, Austria.
Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, UK.
Micromachines (Basel). 2023 Sep 28;14(10):1858. doi: 10.3390/mi14101858.
This work demonstrates the green production of a graphene ink for inkjet printing and its use as a hole transport layer (HTL) in an organic solar cell. Graphene as an HTL improves the selective hole extraction at the anode and prevents charge recombination at the electronic interface and metal diffusion into the photoactive layer. Graphite was exfoliated in water, concentrated by iterative centrifugation, and characterized by Raman. The concentrated graphene ink was incorporated into inverted organic solar cells by inkjet printing on the active polymer in an ambient atmosphere. Argon plasma was used to enhance wetting of the polymer with the graphene ink during printing. The argon plasma treatment of the active polymer P3HT:PCBM was investigated by XPS, AFM and contact angle measurements. Efficiency and lifetime studies undertaken show that the device with graphene as HTL is fully functional and has good potential for an inkjet printable and flexible alternative to PEDOT:PSS.
这项工作展示了用于喷墨打印的石墨烯墨水的绿色生产及其在有机太阳能电池中作为空穴传输层（HTL）的应用。作为HTL的石墨烯改善了阳极处的选择性空穴提取，并防止了电子界面处的电荷复合以及金属扩散到光活性层中。石墨在水中剥离，通过反复离心浓缩，并通过拉曼光谱进行表征。在环境气氛中，通过在活性聚合物上喷墨打印，将浓缩的石墨烯墨水掺入倒置的有机太阳能电池中。在打印过程中，使用氩等离子体增强聚合物与石墨烯墨水的润湿性。通过XPS、AFM和接触角测量对活性聚合物P3HT:PCBM的氩等离子体处理进行了研究。进行的效率和寿命研究表明，以石墨烯作为HTL的器件功能齐全，对于喷墨可打印且灵活的PEDOT:PSS替代品具有良好的潜力。
