Robust hole transport material with interface anchors enhances the efficiency and stability of inverted formamidinium–cesium perovskite solar cells with a certified efficiency of 22.3%,Energy & Environmental Science

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Robust hole transport material with interface anchors enhances the efficiency and stability of inverted formamidinium–cesium perovskite solar cells with a certified efficiency of 22.3%
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2022-04-27 , DOI: 10.1039/d2ee00433j
Rui Chen ₁ , Sanwan Liu ₁ , Xiaojia Xu ₂ , Fumeng Ren ₁ , Jing Zhou ₁ , Xueying Tian ₁ , Zhichun Yang ₁ , Xinyu Guanz ₁ , Zonghao Liu _{1,

3} , Shasha Zhang ₄ , Yiqiang Zhang ₄ , Yongzhen Wu ₂ , Liyuan Han ₅ , Yabing Qi ₆ , Wei Chen _{1,

3}

Affiliation

Perovskite solar cells (PSCs) require both high efficiency and reliable long-term stability for commercialization. As important as the perovskite layer, charge transport layers and their contact with the adjacent perovskite layer also play crucial roles in the efficiency and stability of PSCs. Herein, we report the use of pyridine anchoring group functionalized poly(triarylamine) (p-PY) as the hole transport layer at buried interfaces between the conductive oxide substrate and formamidinium-cesium perovskite layer to enhance the efficiency and stability of inverted PSCs. The p-PY based device exhibited a record efficiency of 22.8% (certified efficiency of 22.3%) and maintained 97.5% of the initial efficiency after operation under 1 sun equivalent white-light light-emitting diode array illumination with maximum power point tracking at 45 °C for 1000 h, and 94% and 81% of the initial efficiencies after harsh thermal aging at 85 °C for 500 h and at 120 °C for 200 h, respectively.

中文翻译：

具有界面锚的坚固空穴传输材料提高了反甲脒-铯钙钛矿太阳能电池的效率和稳定性，经认证的效率为 22.3%

钙钛矿太阳能电池 (PSC) 需要高效率和可靠的长期稳定性才能实现商业化。与钙钛矿层一样重要的是，电荷传输层及其与相邻钙钛矿层的接触对 PSC 的效率和稳定性也起着至关重要的作用。在此，我们报告了使用吡啶锚定基团官能化聚（三芳基胺）（p-PY）作为导电氧化物衬底和甲脒-铯钙钛矿层之间掩埋界面处的空穴传输层，以提高倒置 PSC 的效率和稳定性。基于 p-PY 的设备表现出创纪录的 22.8% 的效率（认证效率为 22.3%）并保持在 97。

更新日期：2022-04-27

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