Optoelectronic properties and stability of next-generation perovskite materials for solar cells

下一代太阳能电池钙钛矿材料的光电性能和稳定性

• 批准号: 2752067
• 金额: --
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2752067
• 关键词: Optoelectronic; properties; stability; next; generation

Organic-inorganic metal halide perovskites (ABX3 stoichiometry) have made a remarkably successful entry into the field of next-generation photovoltaic cells. A rapidly intensifying research activity has since led to certified power conversion efficiencies now exceeding 25% for single-junction thin-film solar cells. While competing technologies currently exist for such devices, the world's growing need for energy supply, lighting and display technologies has created an increasing desire for low-cost, high-efficiency solutions. Continued advances in photovoltaic devices, in particular, are urgently required to address climate change and energy security, which are arguably the greatest challenges to be faced by mankind over the coming century.This Industrial CASE Studentship will focus on critical issues remaining to be resolved regarding the optoelectronic performance and stability of metal halide perovskites.Factors that influence the efficient operation of perovskite solar cells will be elucidated, including mechanisms for electron-phonon coupling, charge-carrier mobility and recombination, light emission and re-absorption. In addition, the stability of these materials will be enhanced through critical examination of factors such as ionic migration and chemical conversion, e.g. under atmospheric conditions. Fundamental photon-to-charge conversion processes will be explored using a combination of ultra-fast optical techniques, e.g. transient absorption, photoluminescence up-conversion and THz pump-probe spectroscopy, while chemical conversions and material instabilities will be examined with x-ray diffraction and electron microscopies. These studies will feed directly into collaborative efforts aimed at propelling forward the creation of commercially available perovskite solar cells, addressing stability, band-gap tunability, lead-free perovskites, trap-free materials, material morphology control and multi-junction device structures. The project will benefit from the complementary expertise of Prof Herz's group at the University of Oxford on fundamental materials analysis, and of the project partner, Oxford Photovoltaics, who are leaders in perovskite solar technology and are currently exploring their use, for example, integrated in tandem with standard silicon solar cells.The proposed research clearly fits within the EPSRC's portfolio, targeting identified Grand Challenges in Physics (Nanoscale Design of Functional Materials) and Chemistry (Directed Assembly of Extended Structures with Targeted Properties). The proposed programme also clearly falls into the EPSRC Themes of Physical Sciences, Energy & Manufacturing the Future; and the Areas of Materials for Energy Applications, Computational and Theoretical Chemistry and Solar Technology.

有机-无机金属卤化物钙钛矿（ABX3化学计量）已非常成功地进入下一代光伏电池领域。此后，快速加强的研究活动已使单结薄膜太阳能电池的经过认证的功率转换效率现已超过 25%。虽然此类设备目前存在竞争技术，但世界对能源供应、照明和显示技术日益增长的需求引发了对低成本、高效率解决方案的日益增长的需求。特别是，迫切需要光伏设备的持续进步来解决气候变化和能源安全问题，这可以说是人类在下个世纪面临的最大挑战。该工业案例学生奖学金将重点关注以下方面仍有待解决的关键问题：金属卤化物钙钛矿的光电性能和稳定性。将阐明影响钙钛矿太阳能电池有效运行的因素，包括电子-声子耦合机制、载流子迁移率和复合、光发射和重新吸收。此外，通过严格检查离子迁移和化学转化等因素，将提高这些材料的稳定性。在大气条件下。将使用超快光学技术的组合来探索基本的光子到电荷的转换过程，例如瞬态吸收、光致发光上转换和太赫兹泵浦探针光谱，而化学转化和材料不稳定性将通过 X 射线衍射和电子显微镜进行检查。这些研究将直接促进合作努力，旨在推动商用钙钛矿太阳能电池的创建，解决稳定性、带隙可调性、无铅钙钛矿、无陷阱材料、材料形态控制和多结器件结构的问题。该项目将受益于牛津大学 Herz 教授团队在基础材料分析方面的互补专业知识，以及项目合作伙伴 Oxford Photovoltaics 的互补专业知识，他们是钙钛矿太阳能技术的领导者，目前正在探索其用途，例如，集成到与标准硅太阳能电池串联。拟议的研究显然符合 EPSRC 的投资组合，针对物理（功能材料的纳米级设计）和化学（具有目标特性的扩展结构的定向组装）领域已确定的重大挑战。拟议的计划也显然属于 EPSRC 的物理科学、能源和制造未来主题；以及能源应用材料、计算和理论化学以及太阳能技术领域。