Benchmarking Chemical Stability of Arbitrarily Mixed 3D Hybrid Halide Perovskites for Solar Cell Applications,Small Methods

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Benchmarking Chemical Stability of Arbitrarily Mixed 3D Hybrid Halide Perovskites for Solar Cell Applications
Small Methods ( IF 10.7 ) Pub Date : 2018-08-14 , DOI: 10.1002/smtd.201800242
Alberto García‐Fernández _{1,

2} , Emilio J. Juarez‐Perez ₁ , Socorro Castro‐García ₂ , Manuel Sánchez‐Andújar ₂ , Luis K. Ono ₁ , Yan Jiang ₁ , Yabing Qi ₁

Affiliation

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.

中文翻译：

任意混合的3D混合卤化物钙钛矿用于太阳能电池的化学稳定性基准测试

准确快速地评估混合成分杂化卤化物钙钛矿材料的固有不稳定性对于钙钛矿太阳能电池的开发至关重要。钙钛矿型太阳能电池必须达到接近于目前基于硅的技术的更长寿命，才能进入商业应用。评估钙钛矿太阳能电池操作稳定性能的常规方法依赖于跟踪设备上的最大功率效率。但是，这种操作稳定性测试程序需要较长的测量时间，这对于筛选混合钙钛矿的巨大组成空间而言是一种效率低下的程序。在这里，显示了一种热降解方案，可以对任何混合的3D杂化钙钛矿材料的稳定性进行快速的初步筛选评估。该稳定性评估确定了两个独立的参数用于稳定性量化。1）降解温度和2）降解过程中吸收的热量。可以得出类似熵的实验参数，以解决每种混合杂化钙钛矿成分的相对稳定性。此外，描述了一种第一原理理论方法，用于计算机搜索最佳混合组成的钙钛矿。该实验稳定性基准测试程序能够表示几种通用的经验法则，以便在装置组装和常规稳定性测试之前发现混合钙钛矿中增强的稳定性趋势。可以得出类似熵的实验参数，以解决每种混合杂化钙钛矿成分的相对稳定性。此外，描述了一种第一原理理论方法，用于计算机搜索最佳混合组成的钙钛矿。该实验稳定性基准测试规程能够表示几种通用的经验法则，以便在装置组装和常规稳定性测试之前发现混合成分钙钛矿中增强的稳定性趋势。可以得出类似熵的实验参数，以解决每种混合杂化钙钛矿成分的相对稳定性。此外，描述了一种第一原理理论方法，用于计算机搜索最佳混合组成的钙钛矿。该实验稳定性基准测试规程能够表示几种通用的经验法则，以便在装置组装和常规稳定性测试之前发现混合成分钙钛矿中增强的稳定性趋势。

更新日期：2018-08-14

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