设计并合成了两个以氯化IC为端基,以10环和12环稠合的核为中心单元的小分子受体,分别为R10-4Cl和R12-4Cl,它们的低光学带隙为1.43和1.35 eV分别。R10-4Cl的X射线晶体学分析表明,相邻分子的端基平行且部分重叠,且π-π距离较短,为3.32Å,这有助于该方向的电子传输。同时,由于S··O的紧密接触距离为3.15Å,因此这两个分子之间存在另一种类型的分子定向,它们之间的夹角约为64.7°。两种类型的分子排列导致R10-4Cl薄膜互穿网络结构,这有助于沿水平方向或倾斜方向快速传输电荷。与PBDB-T聚合物供体混合后,基于R10-4Cl的设备显示出从可见光到近红外区的宽光电流响应,从而更好地利用了日光源。受益于这种全面的太阳能吸收和互穿的电荷转移,基于R10-4Cl的器件显示出高达10.7%的功率转换,并且具有改进的性能。J SC为18.9 mA cm –2。
The invention relates to novel conjugated polymers containing one or more polycyclic repeating units, to methods for their preparation and educts or intermediates used therein, to polymer blends, mixtures and formulations containing them, to the use of the polymers, polymer blends, mixtures and formulations as organic semiconductors in organic electronic (OE) devices, especially in organic photovoltaic (OPV) devices and organic photodetectors (OPD), and to OE, OPV and OPD devices comprising these polymers, polymer blends, mixtures or formulations.
A non-fullerene electron acceptor bearing a fused 10-heterocyclic ring (indacenodithiopheno-indacenodithiophene) with a narrow band gap (∼1.5 eV) was designed and synthesized. It possesses excellent planarity and enhanced effective conjugation length compared to previously reported fused-ring electron acceptors. When this acceptor was paired with PTB7-Th and applied in polymer solar cells, a power
The invention relates to novel conjugated polymers containing one or more polycyclic repeating units, to methods for their preparation and educts or intermediates used therein, to polymer blends, mixtures and formulations containing them, to the use of the polymers, polymer blends, mixtures and formulations as organic semiconductors in organic electronic (OE) devices, especially in organic photovoltaic (OPV) devices and organic photodetectors (OPD), and to OE, OPV and OPD devices comprising these polymers, polymer blends, mixtures or formulations.