CAREER: Control of Charge Carrier Dynamics in Complex Thermoelectric Semiconductors

职业：复杂热电半导体中电荷载流子动力学的控制

• 批准号: 1555340
• 负责人: Eric Toberer
• 金额: $ 62.5万
• 依托单位: Colorado School of Mines
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-03-01 至 2023-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1555340&HistoricalAwards=false
• 关键词: CAREER; Control; Charge; Carrier; Dynamics

Non-Technical AbstractThe objective of this project is to reveal and control charge transport in structurally complex semiconductors to ultimately yield the next generation of thermoelectric materials. The development of advanced thermoelectric materials could have a considerable impact on the nation's energy portfolio through solar thermoelectric generators, cogeneration, and waste heat recovery. More broadly, this program will lead to a deep understanding of charge transport in complex semiconductors that impacts other applications (e.g. transparent conductors, photovoltaic materials, power electronics). These research efforts will be integrated into the classroom through data-driven active learning modules. Community college students will be engaged in solid state materials chemistry and physics through summer research on this project. Technical AbstractIn thermoelectric materials, the energy-dependence of charge carrier transport plays a key role in determining the thermopower. Further, the interplay between solid state chemistry and charge transport in semiconductors is particularly rich due to the profound effects that even dilute chemical perturbations exert on electronic properties. There is thus a grand challenge to understand and control the energy dependence charge transport. In this project, the goal is to combine recent advances in structural determination and first principles calculations, in concert with single crystal growth and advanced transport measurements, to yield deep insight into charge transport through the careful integration of these measurements. With the support of the Solid State and Materials Chemistry program, this understanding will reveal the energy-dependence of charge carrier transport and the associated structural perturbations which can dramatically alter these properties.

非技术摘要该项目的目的是揭示和控制结构复杂的半导体中的电荷运输，以最终产生下一代的热电材料。 先进的热电材料的开发可能会通过太阳能热电发电机，热电联产和废热恢复对国家的能源组合产生重大影响。 更广泛地说，该程序将使对复杂半导体的电荷传输有深入的了解，从而影响其他应用（例如透明导体，光伏材料，电力电子）。 这些研究工作将通过数据驱动的主动学习模块整合到课堂中。 社区大学的学生将通过夏季对该项目的研究从事固态材料化学和物理。 技术摘要热电材料，电荷载体传输的能量依赖性在确定热电器方面起着关键作用。 此外，由于稀释的化学性能对电子性质施加的深刻影响，固态化学和半导体的电荷转运之间的相互作用尤其丰富。 因此，要理解和控制能源依赖电荷运输的挑战是一个巨大的挑战。在该项目中，目标是结合结构确定和第一原理计算的最新进展，并结合单晶生长和高级运输测量，以通过仔细整合这些测量值来深入了解电荷运输。 在固态和材料化学计划的支持下，这种理解将揭示电荷载体传输和相关的结构扰动的能量依赖性，这些扰动可以极大地改变这些特性。