Light scattering studies of organic field-effect transistors

有机场效应晶体管的光散射研究

• 批准号: 0823563
• 负责人: Suchismita Guha
• 金额: $ 26.85万
• 依托单位: University of Missouri-Columbia
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-09-01 至 2012-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0823563&HistoricalAwards=false
• 关键词: Light; scattering; studies; organic; field

The objective of this research is to investigate charge transport properties in interface-controlled organic field-effect transistors (OFETs) using light scattering techniques, with a long term goal of applying OFETs in memory devices. The approach includes (1) layer-by-layer growth of polymer films using pulsed laser deposition to control the semiconductor-dielectric interface in OFETs; (2) probing the dielectric-semiconductor interface using Raman spectroscopy from biased OFET structures and correlating the changes in the vibrational spectra with theory to identify the structural changes upon charge transport; (3) charge modulation spectroscopy of OFETs; (4) surface-enhanced Raman scattering from metal nanoparticle doped dielectric and organic semiconductors for memory applications.The proposed research takes a comprehensive approach to probe charge transport in OFETs by combining light scattering techniques with conventional current-voltage characteristics, yielding information on electron-phonon interactions and structural changes at the interface. Such a technique has a potential transformative character as it promises to become a standard probe for studying charge transport mechanisms in a host of other optoelectronic devices. This hypothesis will be further put to test in organic memory applications where surface-enhanced Raman scattering studies will be carried out to gain insight into the operation of memory devices.The broader impact of the work is demonstrated by recruitment of undergraduate interns including underrepresented minorities from Lincoln University (a Historically Black College & University) to give them opportunities in cutting-edge research. The proposed work involves participation and training of graduate students which will contribute to the US workforce in the area of organic optoelectronics.

本研究的目的是利用光散射技术研究界面控制的有机场效应晶体管(OFET)中的电荷输运特性，以期将OFET应用于存储器件。该方法包括：(1)用脉冲激光沉积的方法逐层生长聚合物薄膜，以控制OFET中的半导体-介质界面；(2)利用偏置的OFET结构的拉曼光谱探测介电-半导体界面，并将振动光谱的变化与理论相关联，以识别电荷传输时的结构变化；(3)OFET的电荷调制光谱；(4)用于存储应用的金属纳米颗粒掺杂介质和有机半导体的表面增强拉曼散射。该研究通过将光散射技术与传统的电流-电压特性相结合，获得关于电子-声子相互作用和界面结构变化的信息，从而综合地研究了探测器在OFET中的电荷输运。这种技术具有潜在的变革性，因为它有望成为研究许多其他光电子器件中电荷传输机制的标准探测器。这一假设将进一步在有机存储应用中进行测试，在有机存储应用中，将进行表面增强拉曼散射研究，以深入了解存储设备的运行。这项工作的更广泛影响通过招募本科生实习生来证明，其中包括来自林肯大学(历史上的黑人学院和大学)的未被充分代表的少数民族，为他们提供前沿研究的机会。拟议的工作涉及研究生的参与和培训，这将为美国有机光电子领域的劳动力做出贡献。