All-small-molecule organic solar cells (SM-OSCs) with a high power conversion efficiency (PCE) of 15.88% (certified 15.5%) are demonstrated by employing 4TIC as the additional non-fullerene acceptor (NFA) to construct ternary SM-OSCs. 4TIC is a highly crystalline acceptor with a similar molecular structure as 6TIC, the host NFA in the binary blend. The addition of 4TIC not only significantly enhances the crystallinity of the blend film but also maintains the desired face-on orientation in the proper multi-length scale morphology to improve both charge extraction and recombination in devices. As a result, the PCE of the ZnP-TBO: 6TIC-based SM-OSCs increases from 12.11% to 14.73% after the addition of 4TIC. For ZnP-TSEH: 6TIC-based SM-OSCs, the PCE increases from 13.54% to 15.88% (certified 15.5%) after the addition of 4TIC. The 15.88% efficiency is the best result for SM-OSCs reported to date.

通过使用4TIC作为附加的非富勒烯受体（NFA）来构建三元SM-，证明了具有15.88％（经认证的15.5％）的高功率转换效率（PCE）的全小分子有机太阳能电池（SM-OSC）。 OSC。4TIC是一种高度结晶的受体，具有与6TIC（二元混合物中的主体NFA）相似的分子结构。4TIC的添加不仅可以显着提高共混膜的结晶度，而且可以在适当的多长度尺度形态下保持所需的面朝取向，从而改善器件中的电荷提取和复合。结果，添加4TIC后，基于ZnP-TBO：6TIC的SM-OSC的PCE从12.11％增加到14.73％。对于ZnP-TSEH：基于6TIC的SM-OSC，添加4TIC后，PCE从13.54％增加到15.88％（经认证的15.5％）。15。