This paper reports self-stimulated dissociation occurring at donor:acceptor interfaces in non-fullerene solar cells to completely separate electron-hole pairs toward developing high-efficiency photovoltaic actions. By monitoring in situ, the dissociation at D:A (PM6:Y6) interfaces with magnetic field effects of the photocurrent, it was observed that, as the excitons are increased by gradually increasing photoexcitation intensity, the dissociation at D:A interfaces becomes surprisingly easier, once the non-fullerene Y6 molecules are optically excited. This presents a self-stimulated dissociation phenomenon identified by gradually increasing light illumination, while monitoring the dissociation with magnetic field effects of the photocurrent. Our photoexcitation-dependent magneto-capacitance at 1 MHz found that optically exciting the Y6 molecules generates a dipolar polarization signal, leading to a light-induced bulk polarization in the PM6:Y6 system. Essentially, the self-stimulated dissociation is enabled by optically excited non-fullerene Y6 molecules with photoinduced dipolar polarization to completely separate electron-hole pairs at D:A interfaces toward developing high-efficiency photovoltaics in non-fullerene organic solar cells.

这篇论文报道了在非富勒烯太阳能电池中的施主：受主界面发生的自激解离作用，以完全分离电子-空穴对，从而发展出高效的光伏作用。通过现场监控，观察到D：A（PM6：Y6）处的解离与光电流的磁场效应相交，观察到，随着激子通过逐渐增加光激发强度而增加，一旦D：A处的离解变得异常容易，非富勒烯Y6分子被光学激发。这呈现出一种自我刺激的解离现象，该现象通过逐渐增加光照明来识别，同时通过光电流的磁场效应来监测解离。我们在1 MHz处依赖于光激发的磁电容发现，对Y6分子进行光学激发会产生双极极化信号，从而导致PM6：Y6系统中光诱导的体极化。本质上，