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Temperature Gradient-Induced Instability of Perovskite via Ion Transport
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-12-29 00:00:00 , DOI: 10.1021/acsami.7b17798
Xinwei Wang 1 , Hong Liu 1 , Feng Zhou 1 , Jeremy Dahan 2 , Xin Wang 1 , Zhengping Li 1 , Wenzhong Shen 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2017-12-29 00:00:00 , DOI: 10.1021/acsami.7b17798
Xinwei Wang 1 , Hong Liu 1 , Feng Zhou 1 , Jeremy Dahan 2 , Xin Wang 1 , Zhengping Li 1 , Wenzhong Shen 1
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Perovskite has been known as a promising novel material for photovoltaics and other fields because of its excellent opto-electric properties and convenient fabrication. However, its stability has been a widely known haunting factor that has severely deteriorated its application in reality. In this work, it has been discovered for the first time that perovskite can become significantly chemically unstable with the existence of a temperature gradient in the system, even at temperature far below its thermal decomposition condition. A study of the detailed mechanism has revealed that the existence of a temperature gradient could induce a mass transport process of extrinsic ionic species into the perovskite layer, which enhances its decomposition process. Moreover, this instability could be effectively suppressed with a reduced temperature gradient by simple structural modification of the device. Further experiments have proved the existence of this phenomenon in different perovskites with various mainstream substrates, indicating the universality of this phenomenon in many previous studies and future research. Hopefully, this work may bring deeper understanding of its formation mechanisms and facilitate the general development of perovskite toward its real application.
中文翻译:
温度梯度通过离子输运引起的钙钛矿不稳定性
钙钛矿因其优异的光电性能和方便的制造而被称为光伏和其他领域的有前途的新型材料。然而,它的稳定性已经成为众所周知的困扰因素,实际上已经严重恶化了它的应用。在这项工作中,首次发现钙钛矿即使在远低于其热分解条件的温度下,由于系统中存在温度梯度,也可能在化学上变得非常不稳定。对详细机理的研究表明,温度梯度的存在可以诱导非本征离子物种向钙钛矿层中的质量迁移过程,从而增强其分解过程。而且,通过对器件进行简单的结构修改,可以在降低的温度梯度的情况下有效地抑制这种不稳定性。进一步的实验证明了这种现象存在于具有多种主流基质的不同钙钛矿中,表明该现象在许多先前的研究和未来的研究中具有普遍性。希望这项工作可以加深对钙钛矿形成机理的理解,并促进钙钛矿在其实际应用中的总体发展。
更新日期:2017-12-29
中文翻译:
![](https://scdn.x-mol.com/jcss/images/paperTranslation.png)
温度梯度通过离子输运引起的钙钛矿不稳定性
钙钛矿因其优异的光电性能和方便的制造而被称为光伏和其他领域的有前途的新型材料。然而,它的稳定性已经成为众所周知的困扰因素,实际上已经严重恶化了它的应用。在这项工作中,首次发现钙钛矿即使在远低于其热分解条件的温度下,由于系统中存在温度梯度,也可能在化学上变得非常不稳定。对详细机理的研究表明,温度梯度的存在可以诱导非本征离子物种向钙钛矿层中的质量迁移过程,从而增强其分解过程。而且,通过对器件进行简单的结构修改,可以在降低的温度梯度的情况下有效地抑制这种不稳定性。进一步的实验证明了这种现象存在于具有多种主流基质的不同钙钛矿中,表明该现象在许多先前的研究和未来的研究中具有普遍性。希望这项工作可以加深对钙钛矿形成机理的理解,并促进钙钛矿在其实际应用中的总体发展。