Zhang Cheng, Nakano Kyohei, Nakamura Masao, Araoka Fumito, Tajima Keisuke, Miyajima Daigo
RIKEN Center for Emergent Matter Science , 2-1 Hirosawa , Wako , Saitama 351-0198 , Japan.
PRESTO, Japan Science and Technology Agency (JST) , Kawaguchi 332-0012 , Japan.
J Am Chem Soc. 2020 Feb 19;142(7):3326-3330. doi: 10.1021/jacs.9b12710. Epub 2020 Feb 7.
The bulk photovoltaic effect (BPVE) has drawn intensive attention due to its unique features that cannot be accessed with the conventional photovoltaic effect. However, the BPVE is observed in noncentrosymmetric materials and has been studied mainly for inorganic materials. Here, we report a simple subphthalocyanine (SubPc) derivative that assembles into a noncentrosymmetric columnar liquid crystal with the help of a DC E-field. These columnar assemblies exhibit the BPVE over a wide range of wavelengths up to 650 nm. Furthermore, just by sandwiching this columnar assembly between two ITO electrodes, the resultant device reaches a light-on/off ratio, /, as high as 6.6 × 10, indicating that the polar columnar assemblies with SubPcs are promising for photodetectors.
体光伏效应（BPVE）因其具有传统光伏效应所不具备的独特特性而备受关注。然而，BPVE在非中心对称材料中被观测到，并且主要针对无机材料进行了研究。在此，我们报道了一种简单的亚酞菁（SubPc）衍生物，它在直流电场的作用下组装成非中心对称的柱状液晶。这些柱状组装体在高达650 nm的宽波长范围内表现出BPVE。此外，仅仅通过将这种柱状组装体夹在两个ITO电极之间，所得器件的光开/关比，即/，高达6.6×10，这表明含有SubPcs的极性柱状组装体在光探测器方面具有潜力。
