300 watt led floodlight Solar knowledge: Because the photo-generated carrier diffusion length of organic solar cells is very short, it can only produce photoelectric conversion at the interface.

For the coated solar cell, there is no obvious p-type region and n-type region compared with the inorganic, and the electron acceptor and the electron donor are intertwined to form a heterojunction.

For such a solar cell, since the free electron diffusion distance of the polymer semiconductor is short, photoelectric conversion can only occur at the interface of the two materials, and the efficiency is limited. A recently developed pin-junction type organic solar cell uses a low molecular organic semiconductor abbreviated as BP as an electron donor, and has a full-filler-inducing structure (SIME) as an electron acceptor for imaging an inorganic solar cell. It has a separate p-type region and an n-type region structure, achieving high conversion efficiency.