Abstract：
Organic-inorganic hybrid perovskite solar cells (PSCs) have achieved an impressive certified efficiency of 25.7%, which is comparatively higher than that of commercial silicon solar cells (23.3%), showing great potential toward commercialization. However, the low stability and high toxicity due to the presence of volatile organic components and toxic metal lead in the perovskites pose significant challenges. To obtain robust and low-toxicity PSCs, substituting organic cations with pure inorganic cations, and partially or fully replacing the toxic Pb with environmentally benign metals, is one of the promising methods. To date, continuous efforts have been made toward the construction of highly performed low-toxicity inorganic PSCs with astonishing breakthroughs. This review article provides an overview of recent progress in inorganic PSCs in terms of lead-reduced and lead-free compositions. The physical properties of poor-lead all-inorganic perovskites are discussed to unveil the major challenges in this field. Then, it reports notable achievements for the experimental studies to date to figure out feasible methods for efficient and stable poor-lead all-inorganic PSCs. Finally, a discussion of the challenges and prospects for poor-lead all-inorganic PSCs in the future is presented.
摘要：
有机-无机混合钙钛矿太阳能电池（PSC）取得了令人印象深刻的25.7％的认证效率，相对高于商业硅太阳能电池(23.3%)，显示出巨大的商业化潜力。然而,由于钙钛矿中挥发性有机成分和有毒金属铅的存在，稳定性低，毒性高，这对钙钛矿提出了重大挑战。为了获得强大且低毒性的PSC，用纯无机阳离子代替有机阳离子，用对环境无害的金属部分或全部取代有毒的铅，是有前途的方法之一。迄今为止,一直在努力构建高性能低毒性无机PSC，并取得了惊人的突破。本文综述了无机PSC在铅还原和无铅组合物方面的最新进展。讨论了贫铅全无机钙钛矿的物理性质，以揭示该领域的主要挑战。然后，它报告了迄今为止的实验研究的显着成就，以找出有效和稳定的贫铅全无机PSC的可行方法。最后,提出了对低铅全无机PSC未来面临的挑战和前景的讨论。
