...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Understanding the stability of mixed A-cation lead iodide perovskites
【24h】

Understanding the stability of mixed A-cation lead iodide perovskites

机译：了解混合阳离子铅碘化钙质钙质的稳定性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The routes and kinetics of the degradation of thin films of methyl ammonium (MA)/formamidinium (FA) lead iodide perovskites (MA(1-x)FA(x)Pbl(3), 0 <= x <= 1) under dry atmospheric conditions have been investigated. MA-rich phases decompose to the precursor iodide salts and Pbl(2), while FA-rich phases convert mainly to the yellow hexagonal phase. The reactivity is strongly inhibited for mixed cation phases of MA(1-x)FA(x)Pbl(3), for x = 0.4 to 0.6, where the decomposition routes available to end member phases become less favourable. It is shown that for pristine films with x = 0.6, Pbl(2) formation can be completely suppressed for up to 10 days. Kinetic analysis reveals that the rate of Pbl(2) formation decays exponentially with increasing FA content until x = 0.7, beyond which the FA containing perovskite transforms rapidly to the hexagonal phase. Ab initio simulations of the decomposition reaction energies fully support the increased kinetic stability found experimentally for the mixed A-cation perovskites.
机译：甲基铵（MA）/甲脒（FA）铅（FA）铅碘化锰（FA）铅钙菌（MA（1-x）Fa（x）pbl（3），0 <= x <= 1）的缩小薄膜的途径和动力学已经研究了大气条件。富含MA的相分解为前体碘化物盐和PBL（2），而FA的相阶段​​主要转化为黄色六边形相。对于MA（1-X）FA（X）PBL（3）的混合阳离相强烈抑制反应性，用于X = 0.4至0.6，其中可用于最终成员阶段的分解路线变得不太有利。结果表明，对于具有X = 0.6的原始膜，可以完全抑制PBL（2）的形成长达10天。动力学分析表明，PBL（2）形成的速率随着CA含量的增加，直到x = 0.7，超过该钙钛矿迅速转化为六边形阶段。分解反应能量的AB Initio模拟完全支持对混合A-Cate钙锌矿进行实验发现的动力学稳定性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号