Modulating Oxygen Vacancies in BaSnO3 for Printable Carbon-Based Mesoscopic Perovskite Solar Cells,ACS Applied Energy Materials

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Modulating Oxygen Vacancies in BaSnO3 for Printable Carbon-Based Mesoscopic Perovskite Solar Cells
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-09-21 , DOI: 10.1021/acsaem.1c01966
Jiale Liu ₁ , Yanjun Guan ₁ , Shuang Liu ₁ , Sheng Li ₁ , Chenxu Gao ₁ , Jiankang Du ₁ , Cheng Qiu ₁ , Daiyu Li ₁ , Deyi Zhang ₁ , Xiadong Wang ₁ , Yifan Wang ₁ , Yue Hu ₁ , Yaoguang Rong ₁ , Anyi Mei ₁ , Hongwei Han ₁

Affiliation

The mesoscopic electron transport layer (m-ETL) has been demonstrated to help perovskite solar cells (PSCs) construct a tough interface against stress and a good contact for efficient extraction of photogenerated electrons. The barium stannate BaSnO₃ (BSO) has exhibited great potential to be applied as PSCs’ m-ETL. However, it lacks wide applications. Here, we report the synthesis of BSO nanoparticles with modulated crystallinity and oxygen vacancy distribution by controlling the heat treatment atmosphere during the synthesizing process via the co-precipitation method and demonstrate their applications as the m-ETL for printable hole-conductor-free carbon-based mesoscopic PSCs (p-MPSCs). We find that heat treatment under nitrogen greatly improves the crystallinity of BSO particles and brings oxygen vacancies, while annealing under oxygen leads to poor crystallinity but effectively eliminates the oxygen vacancies in BSO particles. The BSO particles are first heated in nitrogen to obtain better crystallization and dispersion and then cooled down in oxygen to reduce the surface defects. This heat treatment method could boost the power conversion efficiency (PCE) of p-MPSCs with the BSO m-ETL to 14.77%. However, the PCE values of devices based on BSO synthesized under nitrogen or oxygen alone are 11.94 and 6.86%, respectively.

中文翻译：

调节 BaSnO3 中的氧空位，用于可印刷的碳基介观钙钛矿太阳能电池

已证明介观电子传输层 (m-ETL) 有助于钙钛矿太阳能电池 (PSC) 构建坚固的界面以抵抗应力和良好的接触，以有效提取光生电子。锡酸钡 BaSnO ₃(BSO) 已显示出作为 PSC 的 m-ETL 应用的巨大潜力。然而，它缺乏广泛的应用。在这里，我们通过共沉淀法控制合成过程中的热处理气氛，报告了具有调制结晶度和氧空位分布的 BSO 纳米粒子的合成，并展示了它们作为可印刷空穴导体无碳的 m-ETL 的应用。基于介观 PSC (p-MPSC)。我们发现在氮气下热处理大大提高了 BSO 颗粒的结晶度并带来了氧空位，而在氧气下退火导致结晶度差，但有效地消除了 BSO 颗粒中的氧空位。BSO 颗粒首先在氮气中加热以获得更好的结晶和分散，然后在氧气中冷却以减少表面缺陷。这种热处理方法可以将具有 BSO m-ETL 的 p-MPSC 的功率转换效率 (PCE) 提高到 14.77%。然而，仅在氮气或氧气下合成的基于 BSO 的器件的 PCE 值分别为 11.94 和 6.86%。

更新日期：2021-10-25

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