Understanding and Control of Metal-Organic Contacts and Transport in Organic Devices

了解有机器件如发光二极管（LED）的电流-电压（I-V）特性对于这些器件实现其在显示工程中的潜力是重要的。 需要改进接触和散装运输。 以受控方式修改接触的灵活性对于将新的聚合物透明电极或稳定的高功函数金属结合到有机器件中将是重要的。 在有机器件中，特别是在发光二极管技术中，最关键的剩余问题与电荷注入和传输物理有关。 稳定性被认为是器械工作寿命的主要限制因素。 器件应用的多样性依赖于对有机发光二极管I-V特性的深入理解，而更多的理解可能会指导材料的系统操作。 电流-电压特性将在发射限制和空间电荷限制注入制度。 在高场制度的电致发光，光致发光，拉曼和电流-电压特性将被测量。 本文将对发射限制接触的I-V特性进行理论研究。 我们将研究无序电子聚合物中极化子的高场稳定性和迁移率的场依赖性。 该项目可能与偶极夹层的开发有关，以降低有机器件的工作电压，并允许使用稳定的金属作为触点。

An understanding of current-voltage (I-V) characteristics of organic devices such as light-emitting diodes (LEDs) is important if these devices are to attain their potential for display engineering. Improvements in contacts and bulk transport are required. The flexibility to modify contacts in a controlled fashion will be important for incorporating new polymeric transparent electrodes or stable high work function metals into organic devices. The most critical remaining problems in organic devices, and particularly in light-emitting diode technology, are related to charge injection and transport physics. Stability is thought to be the primary limitation in device operating lifetime. The variety of device applications rely on a deep understanding of I-V characteristics of organic light-emitting diodes, and increased understanding may guide the systematic manipulation of materials. Current-voltage characteristics will be measured in both emission-limited and space charge limited injection regimes. In the high field regime electroluminescence, photoluminescence, Raman and current-voltage characteristics will be measured. A theoretical study of I-V characteristics of emission limited contacts will be carried out. The high-field stability of polarons and the field dependence of mobility in disordered electronic polymers will be investigated. This project may be relevant to the development of dipolar interlayers to reduce operating voltages of organic devices and permit stable metals to be used as contacts.