Spirobifluorene based non-fullerene acceptors (NFAs) having meta-ethylhexyl oxy (m-OEh) substituents (PBDB-T: spiro-bridged NFAs) were synthesized. The orthogonal molecular structure of the m-OEh-substituted spirobifluorene with different end groups provided high solubility and kept the stable morphology between donor-acceptor. Organic Photovoltaic (OPV) device performance was not significantly affected by switching the processing solvent from a chlorinated solvent to an environmentally benign solvent, because suitable morphology and crystallinity were retained. The ITO/ZnO/PBDB-T:spiro-bridged NFA/MoO_x/Ag OPV devices prepared using a chlorobenzene as the processing solvent displayed maximum efficiency in the range of 6.44–5.78%, while the devices made using xylene as the processing solvent had a lower maximum efficiency ranging from 6.14–4.66%. The OPV performance of the devices made using chlorobenzene decreased in the order of sp-mOEh-ITIC > sp-mOEh-ITIC-M > sp-mOEh-ITIC-F > sp-mOEh-ITIC-Cl because an electron donating end group increased open-circuit voltage (Voc), while the electron withdrawing end group increased the short-circuit current density (Jsc). Although the OPV performance of the four spiro-bridged derivatives by xylene was showed to be similar order of that by chlorobenzene solvent processing, the efficiency drop from chlorobenzene solvent to xylene solvent showed following order sp-mOEh-ITIC < sp-mOEh-ITIC-M < sp-mOEh-ITIC-F < sp-mOEh-ITIC-Cl, which depended on the polarity effect of end groups.

合成了具有间-乙基己基氧基（m-OEh）取代基（PBDB-T：螺旋桥联的NFA）的基于Spirobifluorene的非富勒烯受体（NFA）。具有不同端基的间-OEh取代的螺二芴的正交分子结构提供了高溶解度并保持了供体-受体之间的稳定形态。通过将加工溶剂从氯化溶剂切换为对环境无害的溶剂，不会显着影响有机光伏（OPV）器件的性能，因为保留了适当的形态和结晶度。ITO / ZnO / PBDB-T：螺旋桥NFA / MoO _x使用氯苯作为加工溶剂制备的/ Ag OPV装置显示的最大效率在6.44–5.78％范围内，而使用二甲苯作为加工溶剂制备的装置的最大效率较低，在6.14-4.66％的范围内。由于给电子端基增加，使用氯苯制造的器件的OPV性能按sp-mOEh-ITIC> sp-mOEh-ITIC-M> sp-mOEh-ITIC-F> sp-mOEh-ITIC-Cl的顺序降低开路电压（V oc），而吸电子端基增加了短路电流密度（Jsc）。尽管四甲苯螺旋桥连衍生物的OPV性能显示出与氯苯溶剂处理相似的顺序，但从氯苯溶剂到二甲苯溶剂的效率下降显示出以下顺序：sp-mOEh-ITIC <sp-mOEh-ITIC- M <sp-mOEh-ITIC-F <sp-mOEh-ITIC-Cl，这取决于端基的极性效应。