CAREER: Enabling Light-Driven Thermodynamic Cycles

职业：实现光驱动热力循环

• 批准号: 2144662
• 负责人: Andrej Lenert
• 金额: $ 50万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-04-15 至 2027-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2144662&HistoricalAwards=false
• 关键词: CAREER; Enabling; Light; Driven; Thermodynamic

This award is funded in whole or in part under the American Rescue Plan Act of 2021 (Public Law 117-2)As an alternative to conventional mechanical systems, the process of light (photon) emission and absorption can be used for refrigeration and conversion of heat into electricity. This is a solid-state approach that can offer significant advantages in applications where size, cost, speed, and reliability are important, such as renewable energy, solid-state refrigeration, and distributed power generation. Though promising, the approach requires exceptional control over light emission and absorption processes to achieve high performance. The goal of this project is to address this technological gap by developing an innovative device, consisting of Inter-Digitated Emitters and Absorbers of Light (IDEAL), that virtually eliminates photon loss and thus bridges the gap relative to theoretical limits. Such devices can leapfrog the limitations of current mechanical processes and enable a societal transition to a clean and sustainable energy system. This project will also introduce the principles of optical thermodynamics to under-resourced schools in metro Detroit and offer workshops that demystify graduate school, thus expanding STEM opportunities to under-represented communities.With advances in manufacturing enabling high-quality photovoltaic materials, the key barrier to high performance in thermo-photonic devices has become the ability to selectively absorb above-bandgap photons, suppress parasitic absorption of luminescent photons, and maintain efficiency at elevated power densities. These shortcomings have resulted in significant efficiency losses relative to thermodynamic limits. This project will address this gap by developing an innovative device concept, named IDEAL, that features interdigitated photovoltaic absorbers and thermal/luminescent emitters. The novelty of the IDEAL approach is that it (1) creates lines of symmetry that act as perfect broadband reflectors and (2) enhances the power density while preserving efficiency. The project will implement the concept in two model material systems to test its generality and map out the coupling between thermal and optoelectronic properties to provide design rules for high performance. The expected result is almost an order of magnitude reduction in photon loss probabilities compared to current performance in photovoltaics and light-emitting diodes, which will yield large gains in the thermodynamic efficiency of thermophotovoltaic power generation and electroluminescent refrigeration. The IDEAL geometry has the added benefit of potentially enabling power densities that are only accessible to near-field approaches.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.

该奖项的全部或部分资金来自《2021年美国救援计划法案》(公法117-2)。作为传统机械系统的替代方案，光(光子)发射和吸收过程可用于制冷和将热能转化为电能。这是一种固态方法，可以在尺寸、成本、速度和可靠性非常重要的应用中提供显著优势，例如可再生能源、固态制冷和分布式发电。尽管前景看好，但该方法需要对光发射和吸收过程进行特殊控制才能实现高性能。该项目的目标是通过开发一种创新的装置来解决这一技术差距，该装置由指间发射器和光吸收装置(理想)组成，几乎消除了光子损失，从而弥合了相对于理论极限的差距。这种装置可以跨越当前机械工艺的限制，使社会能够向清洁和可持续的能源系统过渡。该项目还将向底特律大都会区资源不足的学校介绍光学热力学原理，并提供研讨会，揭开研究生院的神秘面纱，从而将STEM机会扩大到代表不足的社区。随着使高质量光伏材料成为可能的制造技术的进步，热光器件高性能的关键障碍已成为选择性地吸收带隙以上光子、抑制发光光子的寄生吸收以及在更高的功率密度下保持效率的能力。这些缺点导致了相对于热力学极限的显著效率损失。该项目将通过开发一种名为Idea的创新器件概念来解决这一差距，该器件具有交叉型光伏吸收器和热/发光发射器。理想方法的新奇之处在于，它(1)创造了作为完美宽带反射器的对称线，(2)在保持效率的同时提高了功率密度。该项目将在两个模型材料系统中实施这一概念，以测试其通用性，并绘制出热学和光电性能之间的耦合图，为高性能提供设计规则。与光伏和发光二极管的当前性能相比，预期的结果是光子损失概率几乎减少了一个数量级，这将在热光伏发电和电致发光制冷的热力学效率方面产生巨大的收益。理想的几何形状还有一个额外的好处，那就是潜在地实现了只能通过近场方法获得的功率密度。这一奖项反映了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

High albedo daytime radiative cooling for enhanced bifacial PV performance

• DOI: 10.1515/nanoph-2023-0611
• 发表时间: 2023-12
• 期刊: Nanophotonics
• 影响因子: 7.5
• 作者: Hannah Kim;Yiwei Gao;Ethan Moran;Annyn Howle;Sean McSherry;Spencer Cira;A. Lenert

Nexus of solar and thermal photovoltaic technology could help solve the energy storage problem

太阳能和热光伏技术的结合有助于解决储能问题

• DOI: 10.1016/j.joule.2022.05.015
• 发表时间: 2022
• 期刊: Joule
• 影响因子: 39.8
• 作者: Lenert, Andrej;Forrest, Stephen R.
• 通讯作者: Forrest, Stephen R.

Air-Bridge Cells for Higher Emission Temperatures

用于更高发射温度的空气桥电池

• DOI: 10.1109/pvsc48320.2023.10359802
• 发表时间: 2023
• 期刊: 2023 IEEE 50th Photovoltaic Specialists Conference (PVSC
• 作者: Roy-Layinde, Bosun;Rahman, Areefa;Lim, Jihun;Paul, Sritoma;Forrest, Stephen R.;Lenert, Andrej
• 通讯作者: Lenert, Andrej