CAREER: Developing solution-based thin-film chalcogenide perovskites

职业：开发基于溶液的薄膜硫属化物钙钛矿

• 批准号: 2044859
• 负责人: Charles Hages
• 金额: $ 59.12万
• 依托单位: University of Florida
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-02-01 至 2026-01-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2044859&HistoricalAwards=false
• 关键词: CAREER; Developing; solution; based; thin

NON-TECHNICAL SUMMARYPhotovoltaics are a renewable and clean source of energy which are rapidly becoming one of the cheapest forms of energy available in the US. However, many key scientific advancements are still needed to achieve widespread adoption of photovoltaic technology. This includes discovering and developing new photovoltaic materials and better understanding and controlling their properties. This NSF CAREER award project, supported by the Solid State and Materials Chemistry program in the Division of Materials Research, aims to develop a new class of materials – chalcogenide perovskites – for low-cost, non-toxic, and stable photovoltaics which can replace existing technologies due to their improved properties. Several challenges limit experimental progress for this material. To overcome these, novel techniques developed by Prof. Charles Hages’ research group at the University of Florida are used to synthesize these new materials. This includes the use of extremely small (nanoscale) building blocks to uniquely control material assembly. Experimental work is guided by theoretical work to identify previously unrealized promising materials whose properties are measured through advanced characterization techniques. Integrated with this research is a cross-generational STEM education and outreach plan targeting the underserved local community. This includes (1) a tailored STEM education program in renewable energy for the aging population at local independent- and assisted-living communities, and (2) K-12 education and youth programs in climate change and renewable energy education. The outcomes of this educational plan are: to enhance the perception of the value of science & technology to society, the role of academia, and the value of public funding for these pursuits; to increase public engagement with science and technology; and to enhance scientific literacy, particularly among underrepresented communities.TECHNICAL SUMMARYThis NSF CAREER award project, supported by the Solid State and Materials Chemistry program in the Division of Materials Research, establishes a new solution-based synthesis for chalcogenide perovskites and experimentally realizes new chalcogenide perovskite compounds with desirable optoelectronic properties for photovoltaics. Chalcogenide perovskites are an emerging class of semiconductor with the potential to replace the ubiquitous organic-inorganic hybrid metal halide perovskites as a high-performance photovoltaic absorber. This is a result of their predicted enhanced stability, favorable charge transport and absorption properties, and non-toxic nature – while maintaining the defect tolerance and high optoelectronic tunability typical of perovskites. However, minimal experimental research is reported in this field, resulting in a significant theory experiment knowledge gap. Furthermore, the reported high-temperature syntheses with long reaction times significantly limits their amenability to tunable materials chemistry for controlling their material properties and synthesis into thin films. To address this, Prof. Charles Hages’ research group at the University of Florida pursues research along three specific aims. Aim 1 establishes a new synthesis for thin-film chalcogenide perovskites by reactive annealing of metastable solution-based nanoparticle precursors. Aim 2 proposes a new phase stability analysis for this material space and rationalizes a focus in several previously unrealized selenium-based chalcogenide perovskites. Aim 3 proposes an all-optical characterization strategy to map the synthesis-structure-property relationship of these new compounds. This research is integrated with cross-generational STEM education and outreach in renewable energy, which includes developing and delivering tailored educational modules for the underserved local aging community and K-12 students. Research is also integrated with training and education for graduate and undergraduate students in teaching, technical communication, and in emerging energy technologies.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.

非技术总结光电转换是一种可再生和清洁的能源，正在迅速成为美国最便宜的能源形式之一。然而，仍需要许多关键的科学进步来实现光伏技术的广泛采用。这包括发现和开发新的光伏材料，更好地理解和控制它们的特性。该NSF CAREER奖项目由材料研究部的固态和材料化学计划支持，旨在开发一类新材料-硫属钙钛矿-用于低成本，无毒和稳定的光致发光材料，由于其改进的性能，可以取代现有技术。一些挑战限制了这种材料的实验进展。为了克服这些问题，佛罗里达大学的Charles Hages教授的研究小组开发了新技术来合成这些新材料。这包括使用非常小的（纳米级）构建块来唯一地控制材料组装。实验工作是指导理论工作，以确定以前未实现的有前途的材料，其性能通过先进的表征技术进行测量。与这项研究相结合的是针对服务不足的当地社区的跨代STEM教育和外展计划。这包括（1）为当地独立和辅助生活社区的老龄化人口量身定制的可再生能源STEM教育计划，以及（2）K-12教育和青年气候变化和可再生能源教育计划。该教育计划的成果是：提高对科学&技术对社会的价值、学术界的作用以及公共资金对这些追求的价值的认识;增加公众对科学和技术的参与;并提高科学素养，特别是在代表性不足的社区。技术总结这个NSF职业奖项目，由材料研究部的固态和材料化学计划支持，建立了硫属钙钛矿的新的基于溶液的合成，并通过实验实现了具有用于光致发光的所需光电性能的新的硫属钙钛矿化合物。硫系钙钛矿是一类新兴的半导体材料，具有取代普遍存在的有机-无机混合金属卤化物钙钛矿作为高性能光伏吸收剂的潜力。这是由于它们预测的增强的稳定性、有利的电荷传输和吸收性质以及无毒性质-同时保持钙钛矿典型的缺陷容限和高光电可调谐性。然而，在这一领域的实验研究报告很少，导致一个显着的理论实验知识差距。此外，所报道的具有长反应时间的高温合成显著地限制了它们对用于控制它们的材料性质和合成成薄膜的可调材料化学的适应性。为了解决这个问题，佛罗里达大学的查尔斯·黑格教授的研究小组沿着沿着三个具体目标进行研究。目的1建立一种新的硫属钙钛矿薄膜的合成方法，通过亚稳态溶液基纳米颗粒前体的反应退火。目标2提出了一种新的相稳定性分析，这种材料的空间和合理化的重点在几个以前未实现的硒基硫族钙钛矿。目的3提出了一种全光学表征策略，以映射这些新化合物的合成-结构-性质关系。这项研究与跨代STEM教育和可再生能源推广相结合，其中包括为服务不足的当地老龄社区和K-12学生开发和提供量身定制的教育模块。该奖项反映了NSF的法定使命，并通过使用基金会的知识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

On the Phase Stability of Chalcogenide Perovskites

• DOI: 10.1021/acs.chemmater.2c01289
• 发表时间: 2022-07
• 期刊: Chemistry of Materials
• 影响因子: 8.6
• 作者: Alexander Jess;Ruiquan Yang;C. Hages

A Low-Temperature Growth Mechanism for Chalcogenide Perovskites

• DOI: 10.1021/acs.chemmater.3c00494
• 发表时间: 2023-06
• 期刊: Chemistry of Materials
• 影响因子: 8.6
• 作者: Ruiquan Yang;J. Nelson;Calvin Fai;H. A. Yetkin;Chase Werner;Merielle Tervil;Alexander Jess;P. Dale;C. Hages