Spirobisindane‐Based Hole Transporting Materials for Conventional and Indoor Halide Perovskite Solar Cells

作者：Abdul‐Wasir Shaka, Shaoyang Wang, Nirmal Prashanth Maria Joseph Raj, Raja Sekhar Muddam, Neil B. McKeown, Dominic Taylor, Lethy Krishnan Jagadamma, Graeme Cooke · 发表于：Solar RRL · 年份：2025 · DOI：10.1002/solr.202500208 · 被引用次数：2 · 研究领域：Perovskite Materials and Applications、Conducting polymers and applications、Organic Electronics and Photovoltaics

Hole transporting materials (HTMs) are a vital component for both conventional and indoor perovskite solar cells. Spiro‐OMeTAD has become one of the most widely studied HTM; however, its high molecular symmetry tends to give rise to nonuniform films that are not conducive to good photovoltaic device stability and large‐area processing. Moreover, other issues relating to Spiro‐OMeTAD, such as high cost, have spurred investigations into the development of new HTMs. Here, we report two spirobisindane‐based HTMs ( AS‐135 and AS‐179 ) for conventional and indoor perovskite solar cells. The lower symmetry and ability to synthesize from cheap, readily accessible precursors provides obvious advantages over Spiro‐OMeTAD. We show that spirobisindane‐based HTMs are effective HTMs under both 1 Sun and indoor illumination upon doping with LiTFSi and power conversion efficiency ≈11% were demonstrated under 1 Sun and over 20% under 1000 lx indoor illuminance.