Thermal Properties of Small-Molecule Organic Semiconductors

* 技术摘要 * 本项目将进行测量小分子有机半导体的热导率和相关性能的实验，这些小分子有机半导体对于许多预期的应用（包括薄膜晶体管和热电发电机）都很重要。 虽然近几十年来已经开发了几个与电子性质和晶体结构相关的规则，但对于理解热传输来说并不正确;此外，测量热导率的传统技术通常不适用于许多有机晶体，因为晶体很小，热导率低且各向异性。 PI和他的学生将使用一些静态和动态的技术，在这个项目中开发的一些，来测量大块晶体和薄膜的热导率，与大多数设备相关。 其目的是了解什么限制和控制热传导，并筛选可能的应用材料。 除了PhD。该项目将雇用本科教育专业的学生，他们将在不同的实验技术方面获得丰富的经验，他们将在进行科学研究方面获得宝贵的经验，可以与未来的学生分享。非技术摘要 * 本项目将进行测量小分子有机半导体的热（热）传导率和相关性能的实验。 这些材料正在被探索和开发用于许多应用，包括薄膜晶体管，太阳能电池和热电器件。 对于晶体管和太阳能电池应用，重要的是材料具有足够高的热导率，使得在它们的操作中产生的热可以被有效地带走。 另一方面，对于热电应用，人们期望低的热导率，使得人们可以容易地在样品上建立温度下降。 PI和他的学生将使用许多技术，其中一些在本项目中开发，以测量大块晶体和薄膜的热导率，与许多应用相关，选择材料。 除了PhD。该项目将雇用本科教育专业的学生，他们将在进行科学研究方面获得宝贵的经验，他们可以与未来的学生分享。

****Technical Abstract****This project will pursue experiments to measure thermal conductivities and related properties of small-molecule organic semiconductors, important for many anticipated applications including thin film transistors and thermoelectric power generators. Whereas several rules correlating electronic properties and crystal structures have been developed over recent decades, the same is not true about understanding thermal transport; in addition, traditional techniques for measuring thermal conductivity often don't work well for many organic crystals, for which crystals are small and thermal conductivities low and anisotropic. The PI and his students will use a number of static and dynamic techniques, some developed in this project, to measure thermal conductivities of bulk crystals and thin films, relevant for most devices. The aims are to both gain understanding of what limits and controls heat conduction and to screen materials for possible applications. In addition to Ph.D. students, who will gain extensive experience in different experimental techniques, the project will employ undergraduate education majors, who will gain valuable experience in doing scientific research which they can share with their future pupils.****Non-Technical Abstract****This project will pursue experiments to measure thermal (heat) conductivities and related properties of small-molecule organic semiconductors. These materials are being explored and developed for a number of applications, including as thin-film transistors, solar cells, and thermoelectric devices. For transistor and solar cell applications, it is important that the materials have sufficiently high thermal conductivities so that heat generated in their operation can be efficiently carried away. For thermoelectric applications, on the other hand, one desires a low thermal conductivity so that one can easily establish a temperature drop across the sample. The PI and his students will use a number of techniques, some developed in this project, to measure the thermal conductivities of both bulk crystals and thin films, relevant for many applications, of select materials. In addition to Ph.D. students, who will gain extensive experience in different experimental techniques, the project will employ undergraduate education majors, who will gain valuable experience in doing scientific research which they can share with their future pupils.