Benchmarking Chemical Stability of Arbitrarily Mixed 3D Hybrid Halide Perovskites for Solar Cell Applications
Benchmarking Chemical Stability of Arbitrarily Mixed 3D Hybrid Halide Perovskites for Solar Cell Applications
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DOI：
10.1002/smtd.201800242
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发表时间：
2018-10-16
期刊：
影响因子：
12.4
通讯作者：
Qi, Yabing
中科院分区：
文献类型：
--
作者：
Garcia-Fernandez, Alberto;Juarez-Perez, Emilio J.;Qi, Yabing
准确、快速地评价混合组分混合卤化物钙钛矿材料的本征不稳定性对钙钛矿太阳能电池的发展至关重要。接近当前硅基技术的更长寿命是钙钛矿太阳能电池达到商业应用的强制性属性。评估钙钛矿太阳能电池的操作稳定性性能的传统方法依赖于跟踪设备上的最大功率效率。然而，这种操作稳定性测试程序需要长的测量时间，这是筛选混合钙钛矿的巨大组成空间的低效程序。在这里，示出了用于任何混合的3D混合钙钛矿材料的稳定性的快速初步筛选评估的热降解方案。该稳定性评估确定了稳定性定量的两个独立参数; 1）降解温度和2）降解期间吸收的热量。可以导出实验类熵参数，解决每种混合的杂化钙钛矿组合物的相对稳定性。此外，第一原理的理论方法描述了在硅片上搜索的最佳混合组成的钙钛矿。该实验稳定性基准测试方案能够表示几个一般经验法则，以在装置组装和常规稳定性测试之前发现混合组合物钙钛矿中的增强的稳定性趋势。
Accurate and fast assessment of the intrinsic instability of mixed composition hybrid halide perovskite material is of vital importance for the development of perovskite solar cells. A longer lifetime close to current silicon-based technology is a mandatory property for perovskite solar cells to reach commercial applications. The conventional method to evaluate the operational stability performance of perovskite solar cells relies on tracking maximum power efficiency on devices. However, this operational stability testing procedure requires a long measurement time, which is an inefficient procedure to screen the huge compositional space of mixed perovskites. Here, a thermal degradation protocol is shown for fast preliminary screening evaluation of the stability of any mixed 3D hybrid perovskite material. This stability assessment determines two independent parameters for stability quantification; 1) degradation temperature and 2) heat absorbed during degradation. Experimental entropic-like parameter can be derived addressing the relative stability for each mixed hybrid perovskite composition. In addition, a first-principle theoretical approach is described for the in silico search of optimal mixed composition perovskites. This experimental stability benchmarking protocol is able to signify several general rules of thumb to find enhanced stability trends in mixed composition perovskites prior to device assembly and conventional stability tests.