立方矿的热力学稳定趋势
1Soochow Institute for Energy and Materials Innovations (SIEMIS), College of Physics, Optoelectronics and Energy & Collaborative Innovation Center of Suzhou Nano Science and Technology, and ‡Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province, Soochow University , Suzhou 215006, China.
Journal of the American Chemical Society
|October 7, 2017
概括
一个新的稳定性描述器, (μ + t)η,可以准确预测矿太阳能电池的稳定性. 这一发现有助于发现新的稳定矿和优化现有的矿.
科学领域:
- 材料科学
- 固态化学
- 可再生能源
背景情况:
- 矿太阳能电池对于可再生能源至关重要, 但它们的稳定性仍然是一个关键挑战.
- 戈德施密特容忍系数 (t) 为设计稳定的矿结构提供了有限的定性指导.
- 开发可靠的方法来预测和增强矿的稳定性对于其实际应用至关重要.
研究的目的:
- 在矿化合物中确定更准确的热力学稳定性的描述.
- 与现有方法相比,评估这个新描述符的预测能力.
- 促进发现和稳定用于太阳能电池的新型矿材料.
主要方法:
- 用第一原理计算来确定138个矿化合物的分解能量.
- 研究了一种新的稳定性描述因子 (μ + t) (涉及八面体因子 μ 和原子包装分数 η).
- 根据计算的分解能量验证了 (μ + t)η描述器的预测准确性.
主要成果:
- 描述符 (μ + t)η与矿的热力学稳定性呈现强烈的线性相关性.
- 这种描述器可以准确地预测矿化合物的相对稳定性,准确度约为90%.
- 使用 (μ + t) η 的预测显示了与第一原则计算的良好一致.
结论:
- 描述器 (μ + t) 提供了比戈德施密特容忍因子更精确和可靠的矿热力学稳定性的测量.
- 这种描述器可以显著加快新型稳定的矿材料的高通量选.
- 它为精确控制化学成分提供了有价值的工具,以提高现有的矿的稳定性.
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