Structural diversity of low-dimensional hybrid organic-inorganic perovskites

Over the past decade, hybrid organic-inorganic perovskites (HOIPs) have received significant attention because of their extraordinary properties as active layer in perovskite solar cells (PSC). HOIPs can be prepared with their inorganic frameworks spanning the whole range of dimensionalities: 3D, 2D, 1D and 0D. 2D HOIPs are currently receiving increased attention because of their generally enhanced material stability compared to their 3D counterparts and their much higher degree of compositional flexibility. However, the current research on low-dimensional HOIPs is still in its infancy and a deep fundamental understanding and control over triggers of the crystal growth mechanism acting in low-dimensional HOIP formation is still lacking.

近十年来，有机-无机杂化钙钛矿（HOIPs）因其作为钙钛矿太阳能电池（PSC）活性层所具备的优异性能，受到了广泛关注。该类材料的无机骨架可覆盖全维度范围，包括3维、2维、1维及0维结构。目前二维有机-无机杂化钙钛矿（2D HOIPs）受到的关注度日益提升，这是因为相较于3维对应物，其材料稳定性普遍更强，且组分可调性显著更高。然而当前针对低维有机-无机杂化钙钛矿的研究仍处于起步阶段，对低维杂化钙钛矿形成过程中晶体生长机制的触发因素仍缺乏深入的基础认知与调控手段。