In Operando Characterization of Degradation Processes in Organic Semiconductor Materials

有机半导体材料降解过程的现场表征

• 批准号: 1608289
• 负责人: Jeanne Pemberton
• 金额: $ 59万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-07-01 至 2020-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1608289&HistoricalAwards=false
• 关键词: Operando; Characterization; Degradation; Processes; Organic

Non-technical AbstractOrganic semiconductor materials hold exceptional promise in a number of existing and emerging technologies including optoelectronics, thermoelectrics, bioelectronics, and energy harvesting and storage applications. Degradation of these materials during use is a major issue in the commercial implementation of organic semiconductors. These degradation pathways are thought to be a complex combination of effects resulting from exposure to small amounts of gases and moisture in the ambient atmosphere as well as ultraviolet radiation. With the support of the Solid State and Materials Chemistry program, this foundational effort allows development of sophisticated, state-of-the-art spectroscopic tools based on the interaction of light and electrons with these materials to identify the chemical pathways that accompany degradation, leading to better solutions to solve this complicated problem. This inherently interdisciplinary effort has substantial broader impact through the professional development of the graduate students involved. Graduate students conduct a portion of their dissertation research in the laboratory of the other Principal Investigator, as well as complete a 6-week internship at Next Energy Technologies, Inc. Technical AbstractSolid-state organic semiconductor materials are the essential active components of a variety of existing and emerging technologies, including light-emitting diode lasers and organic-based electronic and photonic devices. These technologies suffer from limited lifetimes due to the inevitable degradation of organic semiconductors through poorly defined chemical, photochemical and photophysical processes, especially in operando, or under conditions of operation. Addressing these limitations requires characterization of the molecular structural, electronic, and charge transport attributes of these organic semiconductor materials during and after degradation. Toward this end, a suite of state-of-the-art methods, including surface vibrational spectroscopies (Raman, PM-IRRAS) in ambient to ultrahigh vacuum, x-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), inverse photoemission spectroscopy (IPES), and charge mobility measurements, are used to study organic semiconductors in environments that systematically increase in chemical and optoelectronic complexity, including in operando. The primary objective of this effort is to undertake a comprehensive fundamental investigation of the chemical, photochemical, and photophysical mechanisms of degradation that underlie the diminished performance and eventual failure of organic semiconductor-based devices. The secondary impact of this effort is formulation of new design criteria for more robust organic semiconductors.

非技术抽象的半导体材料在许多现有技术和新兴技术中都具有非凡的承诺，包括光电，热电学，生物电子学以及能量收集和存储应用。在使用过程中，这些材料的降解是有机半导体商业实施的主要问题。这些降解途径被认为是由于暴露于环境大气中的少量气体和水分以及紫外线辐射而导致的效果的复杂组合。在固态和材料化学计划的支持下，这种基础努力允许基于光和电子与这些材料的相互作用来开发复杂的，最先进的光谱工具，以识别伴随退化的化学途径，从而为解决这个复杂问题提供了更好的解决方案。这项固有的跨学科工作通过参与研究生的专业发展产生了更大的影响。研究生在其他主要研究者的实验室进行了一部分论文研究，并在Next Enerve Technologies，Inc。Inc.进行了为期6周的实习。由于有机半导体不可避免地通过定义的化学，光化学和光学物理过程，尤其是在Operando或操作条件下，这些技术的生命值有限。解决这些局限性需要表征这些有机半导体材料在降解期间和之后这些有机半导体材料的分子结构，电子和电荷传输属性。 Toward this end, a suite of state-of-the-art methods, including surface vibrational spectroscopies (Raman, PM-IRRAS) in ambient to ultrahigh vacuum, x-ray photoelectron spectroscopy (XPS), ultraviolet photoelectron spectroscopy (UPS), inverse photoemission spectroscopy (IPES), and charge mobility measurements, are used to study organic semiconductors in environments that系统地增加了化学和光电复杂性，包括Operando。这项工作的主要目的是对降解的化学，光化学和光物理机制进行全面的基本研究，这是有机半导体设备的性能和最终失败的基础。这项工作的次要影响是制定新设计标准，以实现更健壮的有机半导体。