Polymer acceptors based on perylene diimide (PDI) with three symmetrical S-heteroacene backbone units of different sizes were synthesized for use in all-polymer solar cells (all-PSCs). The effects of varying the size of the heteroacene unit on the backbone of the PDI polymer are evident in the absorption spectra and their energy level offsets, which are correlated with their morphological and photovoltaic properties. These newly synthesized polymers were employed as acceptors with the polymer poly[(2,5-bis(2-hexyldecyloxy)phenylene)-alt-(5,6-difluoro-4,7-di(thiophen-2-yl)benzo[c]-[1,2,5]thiadiazole)] (PPDT2FBT) as the donor in all-PSCs that were found to exhibit modest power conversion efficiencies. The variations in photovoltaic properties of all-PSCs are investigated by characterizing the charge generation, carrier mobilities and recombination. The morphological disorder at the polymer/PPDT2FBT interface and average composition variations are revealed by using grazing incidence wide angle X-ray scattering (GIWAXS) and resonance soft X-ray scattering (R-SoXS) characterizations.

合成了基于per二酰亚胺（PDI）的聚合物受体，该聚合物受体具有三个不同尺寸的对称S-杂并并苯骨架单元，用于全聚合物太阳能电池（all-PSC）。改变杂并苯单元的尺寸对PDI聚合物骨架的影响在吸收光谱及其能级偏移中很明显，这与它们的形态和光伏特性相关。这些新合成的聚合物与聚合物[[2,5-双（2-己基癸氧基）亚苯基] -alt-（5,6-二氟-4,7-二（噻吩-2-基）苯并[ c]-[1,2,5]噻二唑]]（PPDT2FBT）作为全PSC的供体，发现它们具有适度的功率转换效率。通过表征电荷产生，载流子迁移率和重组，研究了全PSC光伏性能的变化。