A profound understanding of the ultrafast interfacial charge transfer (CT), charge separation (CS), and charge recombination (CR) are paramount in enhancing the photoconversion efficiency (PCE) of the solar cell devices. Here, a combination of steady-state and femtosecond transient absorption spectroscopies with broadband capabilities are used to explore and decipher the photoinduced charge carrier dynamics at the PCE10/C60 interfaces. Our experimental results verified the efficient and ultrafast (sub-picosecond) photoinduced electron transfer (ET) from the PCE10 polymer to fullerene acceptor C60. Notably, the slow CR and fast ET make the current PCE10/C60 system ideal for its potential use in solar cells devices.

对超快界面电荷转移（CT），电荷分离（CS）和电荷重组（CR）的深刻理解对于提高太阳能电池设备的光转换效率（PCE）至关重要。在此，结合了具有宽带功能的稳态和飞秒瞬态吸收光谱技术，以探索和破译PCE10 / C60接口处的光生电荷载流子动力学。我们的实验结果验证了从PCE10聚合物到富勒烯受体C60的高效，超快（亚皮秒）光诱导电子转移（ET）。值得注意的是，慢速CR和快速ET使当前的PCE10 / C60系统成为其在太阳能电池设备中潜在应用的理想选择。