A universal method for hysteresis-free and stable perovskite solar cells using water pre-treatment
A universal method for hysteresis-free and stable perovskite solar cells using water pre-treatment
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使用水预处理实现无滞后且稳定的钙钛矿太阳能电池的通用方法
DOI：
10.1016/j.cej.2020.126435
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发表时间：
2021
影响因子：
15.1
通讯作者：
Hao Wang
中科院分区：
文献类型：
--
作者：
Jingshu Wan;Li Tao;Qiao Wang;Kai Zhang;Jian Xie;Jun Zhang;Hao Wang
以SnO 2作为电子传输层的有机-无机混合钙钛矿太阳能电池（PSCs）的功率转换效率（PCE）达到25%以上。然而，长期稳定性和减少滞后仍然是巨大的挑战。为了解决这些问题，不同于传统的对ITO进行UV或臭氧处理，我们在SnO 2层的制备中引入了一种简单、清洁的溶剂工程方法--水旋涂法，获得了致密、高度均匀的SnO 2薄膜。结果表明，水处理后，钙钛矿薄膜的界面缺陷大大减少，同时由于接近完美的SnO 2层，电子输运也得到了加速。因此，与受控装置的约16%PCE相比，使用三重阳离子（Cs/FA/MA）混合的PSC获得了高于19%的改进的PCE。更重要的是，未包裹的PSC与水处理的初始PCE可以保持其初始效率的90%后，暴露于环境条件下360 h，而基于传统的旋涂SnO 2膜的PSC降解约30%。因此，我们所介绍的水旋涂预处理方法是一种有效的、实用的制备高性能SnO 2基PSC的方法。
The power conversion efficiency (PCE) of organic–inorganic hybrid perovskite solar cells (PSCs) with SnO2as an electron transport layer, achieve over 25%. However, the long-term stability and reduction of hysteresis are still great challenges. To solve these problems, different from the traditional treatment on ITO by UV or ozone, we introduce a simple, clean solvent engineering method of water spin-coating in the preparation of the SnO2layer to obtain a compact and highly uniform SnO2film. It is confirmed that after water treatment, the interface defects of the perovskite film are greatly reduced, and the electron transportation is also accelerated due to the near-perfect SnO2layer. As a result, an improved PCE above 19% is obtained with triple cation (Cs/FA/MA)-mixed PSCs compared with ~16% PCE of the controlled devices. More importantly, the initial PCE of unwrapped PSCs with the water treatment can maintain 90% of their initial efficiency after exposure to ambient conditions for 360 h, while, the PSCs based on a conventional spin-coated SnO2film degrade ~30%. Therefore, it is believe that this water spin-coating pre-treatment on SnO2film we introduced can be a valid and practical method to obtain high-performance PSCs based on SnO2.
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影响因子：
56.9
作者：
Lee, Michael M.;Teuscher, Joel;Snaith, Henry J.
通讯作者：
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影响因子：
16.6
作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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界面氧空位是钙钛矿太阳能电池滞后的潜在原因
影响因子：
8.6
作者：
Zhang, Fan;Ma, Wei;Meng, Sheng
通讯作者：
Meng, Sheng