Understanding the Design and Conduction of Materials for Organic Electronics at the Molecular Level

在分子水平上了解有机电子材料的设计和传导

• 批准号: 1206202
• 负责人: Latha Venkataraman
• 金额: $ 52.5万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1206202&HistoricalAwards=false
• 关键词: Understanding; Design; Conduction; Materials; Organic

This project is jointly funded by the Electronic and Photonic Materials Program (EPM) in the Division of Materials Research (DMR) and the Chemical Structure, Dynamics and Mechanisms Program (CSDM) in the Division of Chemistry (CHE).Technical Description: Organic materials as alternates to standard silicon-based semiconductors are fast becoming viable in areas of flexible electronics, sensors and photovoltaics. However, the physical mechanism by which charge transfer occurs in relation to the chemical structure in these systems is not well understood. In this project, important architectural elements of polymers that exhibit the best performance in organic electronics and photovoltaics are dissected to their molecular analogues to study their electronic and photo-induced transport characteristics at the single-molecule level. A series of oligomeric thiophenes are analyzed as analogues of polythiophene and its derivatives to understand the transport characteristics as a function of chemical structure. The scanning tunneling microscope-based break-junction technique is used to measure single-molecule charge transport characteristics and to probe photoconductivity in single-molecule junctions. Finally, analysis to correlate results from single-molecule transport measurements to bulk organic semiconducting device characteristics is used, enabling a multi-scale approach to understanding structure and function of efficient organic semiconductors. Through a combination of synthesis and measurements at the single-molecule level, this project provides molecular design rules for the development of novel materials used for organic electronics and photovoltaics.Non-technical Description: There is a need to understand the governing factors enabling the development of organic semiconductor materials with advanced transport properties to complement their inorganic counterparts. This project bridges the gap between the single-molecule electronic structure components of polymeric semiconductors that exhibit high mobilities and photovoltaic characteristics. Using the fundamental understanding gained from single-molecule experiments enables the design of a new class of materials, which are tested in single molecule junctions as well as device architectures. In addition to developing new compounds that impact organic electronics, an integral part of the project introduces interdisciplinary science to high school, undergraduate and graduate students, aiming to instill a desire to pursue careers in science. The nature of the project requires a close collaboration between the graduate students in the Venkataraman and Campos groups, from Applied Physics and Chemistry. A focus of the PIs is also to recruit undergraduate women and/or minority students to participate in the research and prepare them as competitive applicants for graduate school in the sciences. Finally, basic concepts in organic electronics are adapted for demonstrations at schools in Manhattan.

该项目由材料研究部 (DMR) 电子和光子材料计划 (EPM) 和化学部 (CHE) 化学结构、动力学和机理计划 (CSDM) 联合资助。技术描述：有机材料作为标准硅基半导体的替代品在柔性电子、传感器和光伏领域迅速变得可行。然而，与这些系统中的化学结构相关的电荷转移发生的物理机制尚不清楚。在该项目中，在有机电子和光伏领域表现出最佳性能的聚合物的重要结构元素被分解为它们的分子类似物，以研究它们在单分子水平上的电子和光诱导的传输特性。将一系列低聚噻吩作为聚噻吩及其衍生物的类似物进行分析，以了解作为化学结构函数的传输特性。基于扫描隧道显微镜的断裂结技术用于测量单分子电荷传输特性并探测单分子结中的光电导性。最后，使用分析将单分子输运测量结果与本体有机半导体器件特性相关联，从而实现多尺度方法来理解高效有机半导体的结构和功能。通过单分子水平的合成和测量相结合，该项目为开发用于有机电子和光伏的新型材料提供了分子设计规则。非技术描述：需要了解能够开发具有先进传输性能的有机半导体材料以补充其无机材料的控制因素。该项目弥合了具有高迁移率和光伏特性的聚合物半导体的单分子电子结构组件之间的差距。利用从单分子实验中获得的基本理解可以设计出一类新型材料，并在单分子结和器件架构中进行测试。除了开发影响有机电子学的新化合物外，该项目的一个组成部分还向高中生、本科生和研究生介绍跨学科科学，旨在灌输追求科学职业的愿望。该项目的性质需要应用物理和化学的 Venkataraman 和 Campos 小组的研究生之间的密切合作。 PI 的一个重点还在于招募本科女性和/或少数族裔学生参与研究，并帮助她们成为科学研究生院的竞争性申请者。最后，有机电子学的基本概念适用于曼哈顿学校的演示。