LEAPS-MPS: Solution Processed 2D Tellurene with Outstanding Thermoelectric Properties

LEAPS-MPS：具有出色热电性能的溶液处理二维碲烯

• 批准号: 2213441
• 负责人: Heng Wang
• 金额: $ 23.68万
• 依托单位: Illinois Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2213441&HistoricalAwards=false
• 关键词: LEAPS; MPS; Solution; Processed; 2D

Non-technical Description. Providing precise, localized temperature control is important for many applications, such as to keep microprocessors from overheating and for medical equipment. This is often realized with thermoelectric devices where cooling and heating are performed by special semiconductors. Thermoelectric devices also have the potential for renewable energy, yet cost and efficiency limitations have precluded widespread use. While other semiconductor devices have seen dramatic increases in performance through materials advances, thermoelectric devices still use the same materials as decades ago. This project explores a new pathway to thermoelectrics, taking advantage of recent progress in low-dimensional materials and a novel synthesis technique. This research has the potential for profound impact in many technical areas. The research activities advance knowledge on the control of electrical and thermal transport in two-dimensional semiconductors as well as how to preserve the merit of these materials when they are assembled into bulk forms. The project promotes the education and training of next-generation workforce in semiconductor engineering. These include community-focused, in-person and virtual outreach programs, which serve primarily underprivileged groups on the south side of Chicago.Technical Description. This research project explores tellurene for thermoelectrics, based on a favorable electronic band structure in its two-dimensional form. A large number of degenerate bands is the key feature for better thermoelectric performance. This activity advances research on similar materials for thermoelectric and other applications. Ligand removal will be systematically studied to minimize interface influence on electrical transport. Carrier density tuning, a challenging problem for 2D semiconductors, will be addressed by a surface doping scheme.The use of inorganic binders allows mild-temperature assembly to preserve nanoscale features. Electrical and thermal transport property characterizations are complemented with Boltzmann transport modeling, which provides deep understanding on the unique features of tellurene. Knowledge generated through this research will provide insights on future materials design for thermoelectric and other device applications.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

非技术描述。提供精确的局部温度控制对于许多应用都很重要，例如防止微处理器过热和医疗设备。这通常通过热电装置来实现，其中冷却和加热由特殊半导体执行。热电设备也具有可再生能源的潜力，但成本和效率限制阻碍了广泛使用。尽管其他半导体器件通过材料进步而性能显着提高，但热电器件仍然使用与几十年前相同的材料。该项目利用低维材料和新型合成技术的最新进展，探索热电学的新途径。这项研究有可能对许多技术领域产生深远的影响。这些研究活动增进了有关二维半导体中电和热传输控制以及如何在将这些材料组装成块状形式时保留这些材料优点的知识。该项目促进下一代半导体工程劳动力的教育和培训。其中包括以社区为中心的面对面和虚拟外展计划，主要为芝加哥南部的贫困群体提供服务。技术说明。该研究项目基于二维形式的有利电子能带结构，探索用于热电的碲烯。大量的简并能带是获得更好热电性能的关键特征。这项活动推进了热电和其他应用中类似材料的研究。将系统地研究配体去除，以尽量减少界面对电传输的影响。载流子密度调节是二维半导体的一个具有挑战性的问题，将通过表面掺杂方案来解决。使用无机粘合剂可以在温和的温度下组装以保留纳米级特征。电学和热学输运特性表征与玻尔兹曼输运模型相辅相成，从而深入了解碲烯的独特特征。通过这项研究产生的知识将为热电和其他设备应用的未来材料设计提供见解。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Performance Optimization of Thermoelectric Devices and its Dependence on Materials Properties

热电器件的性能优化及其对材料特性的依赖性

• DOI: 10.54227/mlab.20220053
• 发表时间: 2022
• 期刊: Materials Lab
• 作者: Wang, Heng