The rapid development of perovskite solar cells (PSCs) has stimulated great interest in the fabrication of colorful PSCs to meet the needs of aesthetic purposes in varied applications including building integrated photovoltaics and wearable electronics. However, it remains challenging to prepare high-efficiency PSCs with attractive colors using perovskites with broad optical absorption and large absorption coefficients. Here we show that high-efficiency PSCs exhibiting distinct structural colors can be readily fabricated by employing TiO₂ nanobowl (NB) arrays as a nanostructured electron transport layer to integrate with a thin overlayer of perovskite on the NB arrays. A new crystalline precursor film based on lead acetate was prepared through a Lewis acid-base adduct approach, which allowed for the formation of a uniform overlayer of high-quality CH₃NH₃PbI₃ crystals on the inner walls of the NBs. The PSCs fabricated using the TiO₂ NB arrays showed angle-dependent vivid colors under light illumination. The resultant colorful PSCs exhibited a remarkable photovoltaic performance with a champion efficiency up to 16.94% and an average efficiency of 15.47%, which are record-breaking among the reported colorful PSCs.

钙钛矿太阳能电池（PSC）的快速发展引起了人们对制造彩色PSC的极大兴趣，这些彩色PSC可以满足包括建筑集成光伏和可穿戴电子设备在内的各种应用中美学目的的需求。然而，使用具有宽的光吸收和大吸收系数的钙钛矿制备具有吸引人的色彩的高效PSC仍然具有挑战性。在这里，我们表明，采用TiO ₂可以很容易地制造出具有独特结构颜色的高效PSC。纳米碗（NB）阵列作为纳米结构的电子传输层，可与NB阵列上的钙钛矿薄层集成。通过路易斯酸碱加成法制备了一种新的基于乙酸铅的结晶前驱体膜，该膜可在NB的内壁上均匀形成高质量CH ₃ NH ₃ PbI ₃晶体。使用TiO ₂ NB阵列制造的PSC在光照下显示出与角度相关的鲜艳颜色。所得的彩色PSC表现出卓越的光伏性能，最高效率高达16.94％，平均效率为15.47％，在所报道的彩色PSC中创纪录。