In this work, Raman signals are used to characterize the crystallinity of perovskite films and the photoelectric conversion efficiency (PCE) of perovskite solar cells. By controlling the ratios of EtOH and CHCl₃ during the perovskite crystallization process, the CH₃NH₃PbI₃ film with larger crystal grain size, higher crystallinity and no pinholes can be obtained. Good crystallinity of perovskite films promotes charge transfer (CT), and Raman spectroscopy is a practical method for the real time detection of CT in perovskite films. The results manifest that SERS intensities are conforming to X-ray diffraction (XRD) intensities and the PCE of perovskite solar cells. Meanwhile, the Raman signals are tested in the nitrogen environment, which can avoid the decomposition of perovskite films caused by H₂O and O₂. These results indicate that this method provides an early, real-time and harmless method to study the performance of perovskite photovoltaic devices.

在这项工作中，拉曼信号用于表征钙钛矿薄膜的结晶度和钙钛矿太阳能电池的光电转换效率（PCE）。通过控制钙钛矿结晶过程中EtOH和CHCl ₃的比例，可以形成CH ₃ NH ₃ PbI ₃具有较大晶粒尺寸，较高结晶度且无针孔的薄膜。钙钛矿薄膜的良好结晶度可促进电荷转移（CT），拉曼光谱法是一种实时检测钙钛矿薄膜CT的实用方法。结果表明，SERS强度与钙钛矿太阳能电池的X射线衍射（XRD）强度和PCE一致。同时，在氮环境下测试拉曼信号，可以避免H ₂ O和O ₂引起的钙钛矿薄膜的分解。这些结果表明，该方法为研究钙钛矿光伏器件的性能提供了一种早期，实时且无害的方法。