| abstract |
The invention discloses a kind of water/alcohol soluble conjugated small molecule containing bipyridine/phenanthrolinium salt, its preparation method and its application as a cathode interface modification layer in upright, inverted and laminated photovoltaic devices. When the water/alcohol-soluble conjugated small molecule containing bipyridine/phenanthrolinium salt of the present invention is used as the cathode interface modification layer of a photovoltaic cell, it can form an interface dipole between the light-absorbing active layer and the cathode, reducing the effective functions such as work function, thereby facilitating the transport and extraction of electrons. The conjugated small molecule of the present invention can be dissolved in polar solvents such as methanol, N,N-dimethylformamide, dimethyl sulfoxide, water, etc. Therefore, when constructing a multilayer device, the electron transport layer and the active layer Interfacial intermixing does not occur. |