Collaborative Research: FuSe: High-throughput Discovery of Phase Change Materials for Co-designed Electronic and Optical Computational Devices (PHACEO)

合作研究：FuSe：用于共同设计的电子和光学计算设备的相变材料的高通量发现（PHACEO）

• 批准号: 2329088
• 负责人: Juejun Hu
• 金额: $ 31.5万
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-10-01 至 2026-09-30
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2329088&HistoricalAwards=false
• 关键词: Collaborative; Research; FuSe; throughput; Discovery

Non-technical DescriptionThe demand for energy needed to store and process data is growing at an unsustainable rate. New technologies are clearly needed. Phase change materials, which can dramatically change their electronic, optical, and physical properties during phase transitions, offer a promising solution. Their tunability makes them promising candidates for emerging applications such as energy efficient in-memory computing. This FuSe project will explore a new class of phase change materials that combine five or more elements in comparable amounts. The field of materials science has been captivated by the discovery of such “high entropy” materials. For example, high entropy ceramics have unique thermal and mechanical properties not possible with simpler compositions. In this project, investigators will combine computational materials discovery with combinatorial synthesis to realize high entropy phase change materials. The most promising candidates will be characterized comprehensively and integrated into electronic and photonic computational devices. The team will establish a robust pipeline to educate the next-generation workforce. They will offer rotational internships so that students can work at different universities and in cross-cutting fields and promote their success through mentoring. The team will also create a partnership between the University of Maryland and Howard University, an HBCU, to promote the direct exchange of research mentorship and training.Technical DescriptionThe central hypothesis driving this Future of Semiconductors project is that high-entropy phase change materials (PCMs) can form a thermodynamically stable single phase when elements randomly occupy one type of lattice site and are present in high concentrations rather than as dopants. This structure, stabilized by large configurational entropy, will enable development of PCMS with low/zero resistance drift and large bandgaps (1.5 eV) or extinction coefficient contrast (∆k~2-3) for optical memristors in the visible and infrared. The proposed research comprises four thrust topics to be conducted in a closed-loop fashion. 1) First-principles computation material discovery to predict previously unexplored entropy-stabilized PCMs. 2) Combinatorial synthesis via sputtering of selenides and tellurides and thermal evaporation of sulfides in order to explore multiple compositions in a single run. 3) Electrical, optical, structural, and compositional material characterization to reveal the intrinsic (permittivity, structure, vibrational modes, composition, conductivity, capacitance, etc.) and extrinsic (void formations, capping, geometry, substrates) factors dictating device performance. 4) Integration of PCMs into photonic and electronic devices to demonstrate optical and electrical memristors and memcapacitors with optimal performance.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.

非技术描述以d的速度增长和流程数据所需的需求。能源的计算是一种新的相变材料，这些材料将五个或更多的元素在类似的元素中发现。在带有梳子合成的综合材料中，最有前途的候选者将被表征并整合到电子和光子计算设备中。在Diveretit IES和跨切割领域的工作，并通过指导来促进团队在Unaryland和University U之间建立合作伙伴 - 内向相变材料（PCM）可以形成热力学稳定的单相，随机占用一种晶格位点，以高收缩而不是掺杂剂，而不是通过大型配置熵来稳定。零电阻漂移和大型带隙（1.5 eV）或灭绝系数（∆K〜2-3）用于可见的ED中的光学备忘录通过硒化的综合，硒化的综合和表面蒸发，以探索单个运行中的多个成分。 ，底座）指示设备性能和电子设备的因素，以表现出具有最佳性能的光学和电气回忆录和内存器。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的智力优点和更广泛的影响审查标准来评估的。