In general, perovskite solar cells (PSC) with a sensitized or thin-film architecture absorb light from a single-side illumination, and carrier separation and transport only take place inside the active layer of the perovskite film. Herein, we demonstrated a dual-irradiation PSC system in which light passes through both the fluorinated tin oxide (FTO) side and the Au electrode side, resulting in much faster interfacial charge carrier extraction and transportation than that in a single-irradiation system, in which light passes through from either the FTO or semitransparent Au electrode side. This dual-irradiation PSC system with a configuration of FTO/Cl-TiO₂/Mp-TiO₂/mixed perovskite/spiro-OMeTAD/Au/ITO can form two quasi-interfacial p-n junctions, which occur separately at the interfaces of TiO₂/perovskite and perovskite/spiro-OMeTAD. When the PSC device was illuminated simultaneously from both the FTO and Au/ITO sides, the PSC achieved a total power conversion efficiency (PCE) as high as 20.1% under high light intensity (1.4 sun), which is higher than PCE (18.4%) of a single-irradiation system. The time of flight (TOF) photoconductivity, small perturbation transient photovoltaic (TPV), finite-difference time-domain (FDTD) optical simulations, and dual illumination-side-dependent impedance spectroscopy (ISD-IS) were used to authenticate the presence of two quasi-interfacial p-n junctions in the PSC, creating more charge carriers than only one quasi p-n junction, and thus leading to a fast recombination process.

一般来说，具有敏化或薄膜结构的钙钛矿太阳能电池（PSC）吸收单面照射的光，载流子分离和传输只发生在钙钛矿薄膜的活性层内。在此，我们展示了双辐照 PSC 系统，其中光同时穿过氟化氧化锡 (FTO) 侧和 Au 电极侧，导致界面电荷载流子提取和传输比单辐照系统快得多，光从 FTO 或半透明 Au 电极侧穿过。_{这种具有FTO/Cl-TiO 2} /Mp-TiO ₂ /混合钙钛矿/spiro-OMeTAD/Au/ITO配置的双辐照PSC系统可以形成两个准界面pn_{结，它们分别出现在 TiO 2} /钙钛矿和钙钛矿/spiro-OMeTAD的界面上。当从 FTO 和 Au/ITO 两侧同时照射 PSC 器件时，PSC 在高光强度（1.4 太阳）下的总功率转换效率（PCE）高达 20.1%，高于 PCE（18.4%） ) 的单辐照系统。飞行时间 (TOF) 光电导率、小扰动瞬态光伏 (TPV)、时域有限差分 (FDTD) 光学模拟和双照明侧相关阻抗谱 (ISD-IS) 用于验证存在PSC 中的两个准界面pn结，比只有一个准pn结产生更多的电荷载流子结，从而导致快速重组过程。