Molecular Design of Air-Stable n-type Fluorocarbon Semiconductors

在这个由化学部门化学结构、动态和机制B项目资助的项目中，科罗拉多州立大学化学系的Steven Strauss教授和Olga Boltalina博士将从地球上丰富的元素中设计一系列新的坚固、空气稳定的氟碳受体材料。这些新型轻质氟有机受体将具有n型有机半导体所需的增量可调谐电子特性，并具有足够广泛的固态封装基序，从而允许用于光电子学的高性能和空气稳定材料的分子工程。它们的潜在应用包括但不限于各种有机电子结构（有机光伏器件、有机发光二极管、有机薄膜晶体管和各种类型的化学传感器）。该项目的一个重要目标是通过广泛培养研究生成为下一代解决问题的科学家来推进科学教育。通过参与这个项目，他们将成为化学领域的多面手，学习化学合成的困难艺术，然后通过动手实验掌握一系列物理技术，包括在世界各地的合作实验室中使用的技术。这些材料是基于烃基和含杂原子的多环芳烃，具有多个吸电子基团，主要是氟碳基团，但不完全是。与涉及多个步骤和金属催化剂的常见合成方法不同，该团队将使用无溶剂、无催化剂或无促进剂的气相合成，这将有效地产生大多数热力学稳定的产品。通过对精心挑选的高纯度新型电活性氟碳化合物家族的研究，系统地了解单分子性质与体材料和复合材料功能之间的相互关系，将获得以下物理化学技术：气相电子亲和测量低温光电光谱；循环伏安法;ESR-和uv - vis - nir -光谱电化学；薄膜及其与供体材料共混物的时间分辨微波导电性薄膜和共混物的时间分辨光致发光测量。

In this project funded by the Chemical Structure, Dynamic & Mechanism B Program of the Chemistry Division, Professor Steven Strauss and Dr. Olga Boltalina of the Department of Chemistry at Colorado State University will design a series of new robust, air stable fluorocarbon acceptor materials from earth-abundant elements. These new light-weight fluoroorganic acceptors will possess incrementally tunable electronic properties desirable for n-type organic semiconductors and sufficiently broad range of solid state packing motifs to allow for molecular engineering of high-performance and air-stable materials for optoelectronics. Their potential applications include but are not limited to various organic electronic architectures (organic photovoltaic devices, organic light-emitting diodes, Organic thin-film transistors, and various types of chemical sensors). An important goal of this project will be the advancement of scientific education by broadly training graduate students to become the next generation of problem-solving scientists. By participating in this project they will become chemical jacks-of-all-trades, learning the difficult art of chemical synthesis and then mastering, through hands-on experimentation, an armamentarium of physical techniques, including those in collaborators laboratories around the world.These materials are based on hydrocarbyl and heteroatom-containing polycyclic aromatic hydrocarbons with multiple electron-withdrawing groups, primarily, but not exclusively, fluorocarbon groups. In contrast to common synthetic approaches involving multiple steps and metal catalysts, the team will use a solvent-, catalyst-, or promoter-free gas-phase syntheses that will efficiently yield most thermodynamically stable products. Fundamental understanding of the interrelationships between single molecule properties and bulk material and composites functions will be gained through a systematic approach based on studies of the carefully selected families of high-purity novel electroactive fluorocarbon compounds by the following physicochemical techniques: gas-phase electron affinity measurements by low-temperature photoemission spectroscopy; cyclic voltammetry; ESR- and UV-Vis-NIR-spectroelectro-chemistry; time resolved microwave conductivity of thin films and blends with donor materials; and time-resolved photoluminescence measurements of thin films and blends.