| abstract |
The invention relates to a polymer solar cell based on a surface-modified cathode buffer layer. The cell adopts an inversion structure, and the order from bottom to top is: a transparent substrate, a transparent conductive cathode, a cathode buffer layer, a photoactive layer, and an anode buffer layer. , metal anode; the cathode buffer layer is a surface-modified cathode buffer layer composed of SnO 2 thin film and Alq 3 thin film; SnO 2 thin film is prepared by spin coating, and the rotation speed of the spin-coating machine for preparing SnO 2 thin film is 3000-6000 rpm, and the spin coating time The sol volume used in spin coating was 20-60uL; the Alq 3 film was prepared between the SnO 2 film and the photoactive layer by vacuum evaporation, and its thickness was 2.0-3.5 nm. The invention effectively improves the energy conversion efficiency of the polymer solar cell. |