The growing demand for renewable energy has spotlighted photovoltaics (PVs), particularly perovskite solar cells (PSCs). However, current processes for manufacturing PSCs rely on high-temperature annealing and intricate post-treatments, thereby limiting their applicability. To address this challenge, we introduce a simple approach to produce high-quality perovskite films at room temperature (RT) by precisely regulating the perovskite composition (Cs_x(FA_0.92MA_0.08)_1−xPb(I_0.92Br_0.08)₃) with the addition of an organic linker (oleylamine, OAm). This method enabled phase conversion to the stable α-phase without thermal annealing, as confirmed by in situ X-ray monitoring. The optimized Cs_10+OAm device achieved impressive efficiencies of 23.2% (24.4% with an anti-reflective coating), surpassing efficiencies attained by previous room/low-temperature-processed PSCs. Additionally, we demonstrated the feasibility of fabricating perovskite films on unconventional substrates (natural leaves), showcasing the potential for versatile applications. These findings offer insights into stabilizing the perovskite structure at RT, promising advances in PV technology and sustainable light energy utilization.

对可再生能源不断增长的需求已经成为光伏（PV）领域的焦点，特别是钙钛矿太阳能电池（PSC）。然而，当前的PSC制造工艺依赖于高温退火和复杂的后处理，从而限制了它们的适用性。为了应对这一挑战，我们引入了一种简单的方法，通过精确调节钙钛矿成分（Cs _x (FA _0.92 MA _0.08 ) _1−x Pb(I _0.92 Br _0.08 ) ₃ ) 添加有机连接剂（油胺，奥姆）。正如原位 X 射线监测所证实的那样，这种方法无需热退火即可实现向稳定 α 相的相转变。优化后的 Cs _10+OAm 器件实现了 23.2% 的令人印象深刻的效率（使用抗反射涂层时为 24.4%），超过了之前的室温/低温处理 PSC 所达到的效率。此外，我们还证明了在非常规基材（天然树叶）上制造钙钛矿薄膜的可行性，展示了多种应用的潜力。这些发现为在室温下稳定钙钛矿结构提供了见解，有望在光伏技术和可持续光能利用方面取得进展。