The invention belongs to the technical field of
polymer solar batteries, and relates to structural design of an efficient co-mixed ternary organic
solar battery based on optical waveband absorption. According to the battery, a silver (gold) nanometer matrix is introduced to a ternary
system battery, and an
electric field is constrained around a
micro structure; by exciting a near
field effect, theoptical field is almost permeated into an
active layer; the
active layer is spin coated on a Ag / Au matrix to naturally form a similar micro-
nano grating structure; by exciting surface
plasma polaritons, the incident light is limited in the
active layer; and by adjusting the micro-nano
square matrix period, the
metal thin film thickness and the like, an enhanced optical
absorption effect can be generated within the ultra-wide range of the
ultraviolet light, visible light and near
infrared region. Meanwhile, a donor
polymer and an
acceptor with similar chemical structures and complementary
spectral absorption are co-mixed into a solution so as to prepare into a film, so that the absorption spectrum is expanded, the open-circuit
voltage, the short-circuit current and a
filling factor of a device are substantially improved, the
energy conversion efficiency is high, the preparation success rate of the device is high, and the preparation complexity of the device is low.