Polymer thin-film solar cell with laminated structure

Abstract

The invention discloses a laminated polymer solar cell, which comprises a base plate, an anode layer, an anode modification layer, a first active layer, a cathode modification layer, a cathode layer and an intermediate electrode consisting of an electronic transport layer, a metal layer and a hole transport layer, wherein the intermediate electrode consists of an n-type metallic oxide electron transport layer and a p-type metallic oxide hole transport layer which are high in light transmittance. A thin layer of metal is inserted between the two metallic oxides and the effective combination ofelectrons and holes. The active layers of up and down two sub-cells of the laminated polymer solar cell are mixtures of identical or different conjugated polymers. The open circuit voltage of the laminated solar cell is the sum of the open circuit voltages of the up and down two sub-cells, so the serial connection of polymer photovoltaic cells is realized. The combined intermediated electrode structure can be wildly used in laminated devices with active layers made of conjugated polymers of different light absorption ranges, so as to well match the light absorption of the whole cell with the solar spectrum and improve the energy conversion rate.

Description

technical field

[0001] The invention relates to a laminated structure polymer thin film solar cell. Background technique

[0002] Organic / conjugated polymer thin-film solar cells have incomparable advantages over inorganic solar cells, such as: can be prepared on a soft substrate; industrialized mass production can be realized in a continuous printing process; compared with inorganic silicon cells, the production cost can be reduced Significantly lower; has important ecological and economic advantages. However, conjugated polymer materials typically have narrow absorption bands that do not match the spectrum of sunlight, resulting in low light absorption efficiency. In addition, even if the photons with energy higher than the bandgap of the conjugated polymer can be completely absorbed, the excitons in the highly excited state have to release heat to return to the lowest excited state to achieve charge separation, so a lot of energy is lost. Therefore, the use of conjugate...

Images