What are the working principles of solar energy storage polymer lithium batteries?

The working principle of the solar energy storage polymer lithium battery, when the photons with suitable energy are irradiated on the photosensitive active layer through ITO glass, the donor or acceptor material on the photosensitive active layer absorbs the photons to appear excitons, and then the excitons diffuse to The donor/acceptor interface and charge separation occurs there, and then holes appear on the donor and electrons appear on the acceptor, and then the holes are transferred to the anode along the donor and collected by the anode, and the electrons are transferred along the acceptor to the cathode And is collected by the cathode, and finally a photocurrent and photovoltage appear. A schematic diagram of the photovoltaic effect of a solar polymer cell based on the donor/acceptor approach. The light absorption properties of the donor and acceptor materials, the hole mobility of the donor, the electron mobility of the acceptor, and its highest occupied orbital (HOMO) and The position of the lowest unoccupied orbit (LLUMO) energy level has a significant impact on the performance of organic photovoltaic devices. Regarding the electronic energy level, the donor material should have a relatively high LUMO and HOMO energy level, while the acceptor material should have a lower LUMO and HOMO energy level, so as to ensure that the donor/acceptor interface and the The electrons of the excitons in the body at the LUMO energy level can be spontaneously transferred to the LUMO energy level of the acceptor, and the holes of the excitons in the acceptor at the HOMO energy level can be spontaneously transferred to the HOMo energy level of the donor. So as to achieve the separation of charges. In short, the photoelectric conversion of polymer solar cells can be simplified into the following four processes: the working mechanism diagram of solar polymer cells (1) excitons appear when the donor is excited by light, (2) excitons diffuse to D/A Interface (3) Excitons are separated at the D/A interface to form an electron-hole pair (4) Free carriers are transported and collected at the external electrode. Disclaimer: Some pictures and content of articles published on this site are from the Internet. If there is any infringement, please contact to delete. Previous post: What are the manufacturing process and raw materials for lithium batteries?