Improved performance and stability of perovskite solar modules by interface modulating with graphene oxide crosslinked CsPbBr3 quantum dots,Energy & Environmental Science

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Improved performance and stability of perovskite solar modules by interface modulating with graphene oxide crosslinked CsPbBr3 quantum dots
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2021-11-16 , DOI: 10.1039/d1ee01778k
Shujing Zhang ₁ , Rui Guo ₁ , Haipeng Zeng ₁ , Yang Zhao ₁ , Xingyue Liu ₂ , Shuai You ₁ , Min Li ₁ , Long Luo ₁ , Monica Lira-Cantu ₃ , Lin Li ₁ , Fengxiang Liu ₁ , Xin Zheng ₁ , Guanglan Liao ₂ , Xiong Li ₁

Affiliation

Perovskite solar cells (PSCs) are one of the most prominent photovoltaic technologies. However, PSCs still encounter great challenges of scaling up from laboratorial cells to industrial modules without serious performance loss while maintaining excellent long-term stability, owing to the resistive losses and extra instability factors that scale quadratically with the device area. Here, we manifest a concept of multifunctional interface modulation for highly efficient and stable perovskite solar modules (PSMs). The advisably designed multifunctional interface modulator GO/QD crosslinks the CsPbBr₃ perovskite quantum dots (QDs) on the conductive graphene oxide (GO) surfaces, which significantly improve charge transport and energy band alignment at the perovskite/hole transporting layer interface to reduce the charge transport resistance while passivating the surface defects of the perovskite to inhibit carrier recombination resistive losses. Moreover, the GO/QD interlayer acts as a robust permeation barrier that modulates the undesirable interfacial ion and moisture diffusion. Consequently, we adopt a scalable vacuum flash-assisted solution processing (VASP) method to achieve a certified stabilized power output efficiency of 17.85% (lab-measured champion efficiency of 18.55%) for the mini-modules. The encapsulated PSMs achieve over 90% of their initial efficiency after continuous operation under 1 sun illumination and the damp heat test at 85 °C, respectively.

中文翻译：

通过与氧化石墨烯交联的 CsPbBr3 量子点进行界面调制，提高钙钛矿太阳能模块的性能和稳定性

钙钛矿太阳能电池（PSC）是最突出的光伏技术之一。然而，由于电阻损耗和额外的不稳定性因素与器件面积成二次方扩展，PSC 在从实验室电池扩展到工业模块方面仍然面临着巨大的挑战，而不会造成严重的性能损失，同时保持出色的长期稳定性。在这里，我们展示了用于高效稳定的钙钛矿太阳能模块（PSM）的多功能界面调制概念。设计合理的多功能界面调制器 GO/QD 使 CsPbBr ₃交联导电氧化石墨烯 (GO) 表面上的钙钛矿量子点 (QD)，可显着改善钙钛矿/空穴传输层界面处的电荷传输和能带排列，以降低电荷传输电阻，同时钝化钙钛矿的表面缺陷以抑制载流子复合电阻损失。此外，GO/QD 中间层充当强大的渗透屏障，可调节不需要的界面离子和水分扩散。因此，我们采用可扩展的真空闪光辅助溶液处理 (VASP) 方法来实现微型模块 17.85% 的认证稳定功率输出效率（实验室测量的冠军效率为 18.55%）。

更新日期：2021-12-07

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