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.

非技术性描述。提供精确、局部的温度控制对于许多应用非常重要，例如防止微处理器过热和医疗设备。这通常是通过热电设备实现的，其中冷却和加热由特殊的半导体执行。热电设备也具有可再生能源的潜力，但由于成本和效率的限制，无法广泛使用。虽然其他半导体器件通过材料的进步大大提高了性能，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的最新进展和一种新的合成技术，探索了一条获得热电材料的新途径。这项研究有可能在许多技术领域产生深远影响。研究活动增进了对二维半导体中电和热传输的控制以及如何在将这些材料组装成块状时保留其优点的知识。该项目促进了半导体工程领域下一代劳动力的教育和培训。这些计划包括以社区为中心的、面对面的和虚拟的外展计划，这些计划主要服务于芝加哥南部的贫困群体。这项研究项目探索用于热电的碲，基于其二维形式的良好的电子能带结构。大量的简并带是获得更好热电性能的关键。这项活动促进了热电和其他应用的类似材料的研究。将系统地研究配体的去除，以最大限度地减少界面对电传输的影响。对于2D半导体来说，载流子密度调节是一个具有挑战性的问题，将通过表面掺杂方案来解决。无机粘结剂的使用允许在温和的温度下组装以保持纳米级的特征。电学和热学输运性质的表征与玻尔兹曼输运模型相辅相成，该模型提供了对碲的独特特征的深刻理解。通过这项研究获得的知识将为热电和其他设备应用的未来材料设计提供洞察力。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势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