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The Role of Water in the Reversible Optoelectronic Degradation of Hybrid Perovskites at Low Pressure
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-11-14 00:00:00 , DOI: 10.1021/acs.jpcc.7b06402 Genevieve N. Hall 1, 2 , Michael Stuckelberger 1 , Tara Nietzold 1 , Jessi Hartman 3 , Ji-Sang Park 3 , Jérémie Werner 4 , Bjoern Niesen 4 , Marvin L. Cummings 3, 5 , Volker Rose 3, 5 , Christophe Ballif 4 , Maria K. Chan 3, 6 , David P. Fenning 7 , Mariana I. Bertoni 1
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2017-11-14 00:00:00 , DOI: 10.1021/acs.jpcc.7b06402 Genevieve N. Hall 1, 2 , Michael Stuckelberger 1 , Tara Nietzold 1 , Jessi Hartman 3 , Ji-Sang Park 3 , Jérémie Werner 4 , Bjoern Niesen 4 , Marvin L. Cummings 3, 5 , Volker Rose 3, 5 , Christophe Ballif 4 , Maria K. Chan 3, 6 , David P. Fenning 7 , Mariana I. Bertoni 1
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There is no doubt about the potential offered by the low-cost fabrication and high efficiency of hybrid organic–inorganic perovskite solar cells. However, the service lifetimes of these devices must be increased from months to years to capitalize on their potential. The archetypal hybrid perovskite for solar cells, methylammonium lead iodide (CH3NH3PbI3, abbreviated MAPI), readily degrades in ambient atmosphere under standard operating conditions. Understanding the origin and effects of this degradation can pave the way to better engineer photovoltaic devices and the perovskite material itself. Herein we present the effects of varying pressure on the electrical performance of MAPI solar cells. Solar cell parameters, especially open circuit voltage, are significantly affected by the total ambient pressure and present an unexpected reversible behavior upon pressure cycling. We complement photoluminescence studies as a function of ambient atmosphere and temperature with first-principles density functional theory (DFT) calculations. The results suggest that the reversible intercalation of water in MAPI is a necessary component underlying this behavior.
中文翻译：
水在低压下混合钙钛矿可逆光电降解中的作用
毫无疑问，低成本的制造和高效率的有机-无机钙钛矿混合太阳能电池所提供的潜力。但是，这些设备的使用寿命必须从数月延长至数年，以充分利用其潜力。太阳能电池的原型混合钙钛矿，甲基铵碘化铅（CH 3 NH 3 PbI 3，简称MAPI），在标准操作条件下，在环境大气中容易降解。了解这种降解的起因和影响可以为更好地设计光伏设备和钙钛矿材料本身铺平道路。本文中，我们介绍了压力变化对MAPI太阳能电池电性能的影响。太阳能电池的参数，尤其是开路电压，受总环境压力的显着影响，并且在压力循环时会表现出意想不到的可逆行为。我们用第一原理密度泛函理论（DFT）计算对光致发光研究作为环境大气和温度的函数进行补充。结果表明，MAPI中水的可逆嵌入是此行为的必要组成部分。
更新日期：2017-11-15
中文翻译：
水在低压下混合钙钛矿可逆光电降解中的作用
毫无疑问，低成本的制造和高效率的有机-无机钙钛矿混合太阳能电池所提供的潜力。但是，这些设备的使用寿命必须从数月延长至数年，以充分利用其潜力。太阳能电池的原型混合钙钛矿，甲基铵碘化铅（CH 3 NH 3 PbI 3，简称MAPI），在标准操作条件下，在环境大气中容易降解。了解这种降解的起因和影响可以为更好地设计光伏设备和钙钛矿材料本身铺平道路。本文中，我们介绍了压力变化对MAPI太阳能电池电性能的影响。太阳能电池的参数，尤其是开路电压，受总环境压力的显着影响，并且在压力循环时会表现出意想不到的可逆行为。我们用第一原理密度泛函理论（DFT）计算对光致发光研究作为环境大气和温度的函数进行补充。结果表明，MAPI中水的可逆嵌入是此行为的必要组成部分。
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