SpiroOMeTAD is a well-recognized hole-transport materials for perovskite solar cells (PSCs). Besides, due to a complex synthesis, this compound is costly and alternatives to this structure are thus actively researched. With aim at developing low-cost hole-transport materials while maintaining an excellent hole-transport ability, phenoxazine has been identified as an appealing candidate. In this review, an overview of the phenoxazine-based hole-transport materials developed to date for perovskite solar cells is provided.

中文翻译：

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钙钛矿太阳能电池吩恶嗪基空穴传输分子的最新进展

SpiroOMeTAD 是一种公认​​的钙钛矿太阳能电池（PSC）空穴传输材料。此外，由于合成复杂，该化合物价格昂贵，因此正在积极研究该结构的替代品。为了开发低成本空穴传输材料，同时保持优异的空穴传输能力，吩恶嗪已被认为是一个有吸引力的候选者。在这篇综述中，概述了迄今为止开发的用于钙钛矿太阳能电池的基于吩恶嗪的空穴传输材料。