A series of n-type semiconducting conjugated polymers based on naphthalene diimide (NDI) having three different side chains, 5-decylpentadecyl, 2-octyldodecyl and 4-(2-octyldodecyloxy)phenyl, were synthesized. Experimental results showed that the subtle structural changes at the side chains can influence the molecular packing, electron mobility, blend film morphology and thus performance of bulk-heterojunction polymer photodetectors using these NDI-based polymers as acceptors. The optimized all-polymer photodetector exhibited a specific detectivity (D*) of over 10¹³ Jones in the spectral region of 300–800 nm under −0.1 V bias, which is among the best D* values of the reported UV–vis–NIR all-polymer photodetectors and comparable to the best fullerene-based photodetectors.

中文翻译：

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用于高性能全聚合物光电探测器的基于萘二酰亚胺的n型聚合物的侧链工程†

合成了基于具有两个不同侧链的萘二酰亚胺（NDI）的一系列n型半导体共轭聚合物，所述侧链为5-癸基十五烷基，2-辛基十二烷基和4-（2-辛基十二烷基氧基）苯基。实验结果表明，使用这些基于NDI的聚合物作为受体，侧链上的细微结构变化会影响分子堆积，电子迁移率，共混膜形态，从而影响体-异质结聚合物光电探测器的性能。经过优化的全聚合物光电探测器在-0.1 V偏压下在300-800 nm的光谱范围内显示出超过10 ¹³ Jones的比探测率（D *），这是最好的D值之一*报道的紫外可见近红外全聚合物光电探测器的值，可与最佳的基于富勒烯的光电探测器相媲美。