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

有机器件中金属有机接触和输运的理解和控制

• 批准号: 9970663
• 负责人: Lewis Rothberg
• 金额: $ 25.11万
• 依托单位: University of Rochester
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9970663&HistoricalAwards=false
• 关键词: Understanding; Control; Metal; Organic; Contacts

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.

如果发光二极管 (LED) 等有机器件要发挥其在显示工程方面的潜力，那么了解这些器件的电流-电压 (I-V) 特性非常重要。 需要改进接触和批量运输。 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整合到有机器件中非常重要。 有机器件，特别是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。 稳定性被认为是设备工作寿命的主要限制。 各种器件应用依赖于对有机发光二极管 I-V 特性的深入理解，加深理解可以指导材料的系统操作。 将在发射限制和空间电荷限制注入模式下测量电流-电压特性。 在高场状态下，将测量电致发光、光致发光、拉曼和电流-电压特性。 对发射限制触点的 I-V 特性进行理论研究。 将研究极化子的高场稳定性和无序电子聚合物中迁移率的场依赖性。 该项目可能与偶极中间层的开发有关，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。