Organic-inorganic perovskite solar cells have been highlighted as one of the most competitive thin film photovoltaics recently. It is promising to further raise the power conversion efficiency if high quality absorber is coupled with rational optical design for effective photon management. Here we demonstrate the implementation of perovskite nanostructure assembly by simple solution process to interfere the propagation of light inside the adjacent absorber. It enhances light harvesting to obtain higher attainable photocurrents and photovoltage in the resultant devices, achieving a decent power conversion efficiency (PCE) over 19% consequently. The presented nanostructure assembly integrates perovskite materials with desirable processibility and chemical compatibility by chemical synthesis and interface modification. For the first time, a synergetic localized “gratings” and enhanced fluorescence effect was demonstrated to govern photon management in perovskite solar cells. These findings may serve as a general guide to design and construct perovskite thin solar cells with efficiency approaching Shockley-Queisser limit.

最近，有机无机钙钛矿太阳能电池已成为最有竞争力的薄膜光伏电池之一。如果高质量的吸收体与合理的光学设计相结合以实现有效的光子管理，则有望进一步提高功率转换效率。在这里，我们通过简单的溶液工艺演示了钙钛矿纳米结构组件的实现，以干扰光在相邻吸收体内部的传播。它增强了光收集功能，从而在最终的器件中获得了更高的可达到的光电流和光电压，从而实现了超过19％的体面功率转换效率（PCE）。提出的纳米结构组件通过化学合成和界面改性，将钙钛矿材料与所需的可加工性和化学相容性结合在一起。首次，协同局部“光栅”和增强的荧光效应被证明可控制钙钛矿太阳能电池中的光子管理。这些发现可以作为设计和构造钙钛矿薄型太阳能电池的通用指南，其效率接近肖克利-奎塞尔极限。