Oxide Perovskites for Thermally Enhanced Solar Energy Conversion

用于热增强太阳能转换的氧化物钙钛矿

• 批准号: EP/Y027647/1
• 负责人: Ibrahim Ahmet
• 金额: $ 25.55万
• 依托单位: University of Oxford
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2024
• 资助国家: 英国
• 起止时间: 2024 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FY027647%2F1
• 关键词: Oxide; Perovskites; Thermally; Enhanced; Solar

The following research proposal is aimed at providing a fundamental understanding of how dopants and defects (including theirrespective energetic and structural disorder) can modify the electronic structure and charge transport properties of main group metaloxide perovskites, such as oxygen-deficient BaSnO3-x, which possess optically active valent ns2 lone pair states. This project offers anexceptional combination of fundament energy materials theory, advanced spectroscopic characterization, and devicedemonstrations. One of the main goals of the project is to resolve certain controversies in the current understanding of chargetransport in engineered metal oxide semiconductors, which often deviate from the typical band-like models applied to classicalcrystalline absorber materials. Adding specific dopants and/or defects into oxide perovskites, at relatively high concentrations (1-10mol %) can lead to increased peak charge carrier mobilities, moderate carrier concentrations (via compensation), and simultaneouslygenerate mid-band gap states with relatively strong optical transitions. This engineering process has the potential to substantiallyenhance the optoelectronic performance of the oxide semiconductors. A combination of state-of-the-art experimental andtheoretical approaches will be used, including advanced chemical deposition and device fabrication, in-depth materialscharacterization, photo-electrochemical/catalytic analysis, and energy and time dependant spectroscopy. A unique aspect of thisresearch is the characterization of temperature-dependent charge carrier dynamics to provide an accurate mechanisticunderstanding of thermally activated charge transport in oxide materials by considering dynamic disorder models. Subsequently, weaim to demonstrate how solar thermal integration can act as an innovative strategy to enhance the performance of oxide basedphotocatalytic and photovoltaic (PV) systems for efficient solar energy conversion up to 10%.

以下研究计划旨在提供对掺杂剂和缺陷（包括它们各自的能量和结构无序）如何改变主族金属氧化物钙钛矿（例如缺氧的BaSnO3-x）的电子结构和电荷传输特性的基本了解，该钙钛矿具有光学活性价 ns2 孤对电子态。该项目提供了基础能源材料理论、先进光谱表征和设备演示的特殊组合。该项目的主要目标之一是解决当前对工程金属氧化物半导体中电荷传输的理解中的某些争议，这些争议通常偏离应用于经典晶体吸收材料的典型带状模型。在氧化物钙钛矿中添加特定的掺杂剂和/或缺陷，以相对较高的浓度（1-10mol％）可以导致峰值载流子迁移率增加，适度的载流子浓度（通过补偿），并同时产生具有相对较强光学跃迁的中带隙态。该工程过程有可能大幅增强氧化物半导体的光电性能。将结合最先进的实验和理论方法，包括先进的化学沉积和器件制造、深入的材料表征、光电化学/催化分析以及能量和时间依赖性光谱学。这项研究的一个独特方面是对温度相关载流子动力学的表征，通过考虑动态无序模型，提供对氧化物材料中热激活电荷传输的准确机械理解。随后，我们旨在展示太阳能热集成如何作为一种创新策略来增强基于氧化物的光催化和光伏 (PV) 系统的性能，将太阳能转换效率提高至 10%。