Analysis of the Oxygen Passivation Effects on MAPbI3 and MAPbBr3 in Fresh and Aged Solar Cells by the Transient Photovoltage Technique,ChemPlusChem

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Analysis of the Oxygen Passivation Effects on MAPbI3 and MAPbBr3 in Fresh and Aged Solar Cells by the Transient Photovoltage Technique
ChemPlusChem ( IF 3.0 ) Pub Date : 2021-07-12 , DOI: 10.1002/cplu.202100204
Lijun Su _{1,

2} , Maria Méndez ₂ , Jesús Jiménez-López ₂ , Miaoli Zhu ₁ , Yaoming Xiao ₃ , Emilio José Palomares Gil _{2,

4}

Affiliation

Previous studies have revealed that for some perovskite compositions, power conversion efficiencies (PCEs) improved after storing the devices in different ambient conditions. With the aim of better understanding such improvements, we focus our attention on the carrier/ionic dynamic kinetics of fresh and aged PSCs with different perovskite compositions (MAPbI₃ and MAPbBr₃) and using spiro-OMeTAD as HTM. For that, we use transient photovoltage (TPV), a technique used to analyse the different recombination kinetics at equilibrium and at different illumination times. We observe that the aging treatment causes significant changes on the kinetics behaviour for bromide-based devices, resulting in a positive influence on the cell performance (from 3.5 % to 6.1 % PCE, in reverse scan). However, the kinetics for those iodide-based perovskite solar cells remains unchangeable (from 16.3 % to 15.0 % PCE, in reverse scan).

中文翻译：

瞬态光电压技术分析新旧太阳能电池中MAPbI3和MAPbBr3的氧钝化效应

先前的研究表明，对于某些钙钛矿组合物，在不同环境条件下储存设备后，功率转换效率 (PCE) 有所提高。为了更好地理解这些改进，我们将注意力集中在具有不同钙钛矿成分（MAPbI ₃和 MAPbBr _3）的新鲜和老化 PSC 的载体/离子动力学动力学上。) 并使用 spiro-OMeTAD 作为 HTM。为此，我们使用瞬态光电压 (TPV)，这是一种用于分析平衡和不同光照时间下不同重组动力学的技术。我们观察到老化处理会导致基于溴化物的器件的动力学行为发生显着变化，从而对电池性能产生积极影响（从 3.5% 到 6.1% PCE，在反向扫描中）。然而，那些基于碘化物的钙钛矿太阳能电池的动力学保持不变（从 16.3% 到 15.0% PCE，在反向扫描中）。

更新日期：2021-09-15

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