CAREER: Elucidating Structures of Charge Traps in Organic Photovoltaic Materials Using Ultrafast 2D IR Spectroelectrochemistry

职业：利用超快二维红外光谱电化学阐明有机光伏材料中电荷陷阱的结构

• 批准号: 0846241
• 负责人: John Asbury
• 金额: $ 62.4万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-01 至 2015-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0846241&HistoricalAwards=false
• 关键词: CAREER; Elucidating; Structures; Charge; Traps

In this award funded by the Experimental Physical Chemistry Program of the Division of Chemistry, Professor John B. Asbury of the Pennsylvania State University will use two-dimensional infrared spectroelectrochemistry to study the molecular structures of defects in organic electronic materials. When electrons or positively charged carriers (termed holes) become trapped at defects in organic electronic materials, the electrical functionality of the materials is significantly reduced. The research funded by this award will use the dynamics of molecular vibrations in conjunction with their frequencies to elucidate the structures of defects in organic photovoltaic materials. In particular, defects will be charged electrochemically allowing them to be examined with two-dimensional infrared spectroscopy. The vibrational dynamics and 2D line shapes of charged defects will be compared to the corresponding features of the neutral materials for which structural assignments are known, thus facilitating structural elucidation of the defects. This approach will be used to establish predictive relationships among the structural and electrical characteristics and the corresponding defect structures and energetic distributions in organic photovoltaic materials.The development of two-dimensional infrared spectroscopy as an analytical tool to examine defects will impact the organic electronics field by developing predictive structure-property relationships. Knowledge of these relationships will guide the rational design of organic photovoltaic materials that resist the formation of or are tolerant to defects, leading to the development of inexpensive solid state solar cells with greater than 10% power conversion efficiency. The understanding of charged defects will also facilitate the development of inexpensive lighting and display technologies based on organic electronic materials. The interdisciplinary nature of the research program will stimulate graduate and undergraduate researchers to work at the interface of ultrafast spectroscopy and materials disciplines. The educational plan is firmly rooted in the recommendations of the National Academies for enhancing the science and technology enterprise in the United States. Special emphasis is placed on targeting secondary school science education by involving in-service high school teachers in the research program supported by this award and by developing summer curricula for students from under-performing high schools through the Upward Bound Math and Science program of the U.S. Department of Education.

在由化学部实验物理化学计划资助的该奖项中，宾夕法尼亚州立大学的约翰·B·阿斯伯里教授将使用二维红外光上电性化学来研究有机材料中缺陷的分子结构。 当电子或带电的载体（称为孔）被困在有机电子材料中的缺陷处时，材料的电气功能会大大降低。 该奖项资助的研究将使用分子振动的动力学及其频率来阐明有机光伏材料中缺陷的结构。 特别是，将在电化学上充电，以使其通过二维红外光谱进行检查。 带电缺陷的振动动力学和2D线形状将与已知结构分配的中性材料的相应特征进行比较，从而促进了缺陷的结构阐明。 该方法将用于在有机光伏材料中建立结构和电气特征以及相应的缺陷结构和能量分布之间的预测关系。二维红外光谱谱图作为检查缺陷的分析工具的开发将通过建立预测性结构 - 特性关系来影响有机电子技术。 这些关系的知识将指导有机光伏材料的合理设计，这些材料抵抗或耐药物的形成或宽容，从而导致廉价的固态太阳能电池的发展，其功率转换效率大于10％。 对带电缺陷的理解还将促进基于有机电子材料的廉价照明和展示技术的发展。 研究计划的跨学科性质将刺激研究生和本科研究人员在超快光谱和材料学科的界面上工作。 该教育计划牢固地植根于国家学院的建议，以增强美国的科学和技术企业。 特别重点是针对中学科学教育，通过涉及该奖项支持的研究计划，并通过美国教育部的向上约束数学和科学计划为来自表现不佳的高中的学生开发夏季课程。