A kind of solar cell and its preparation method

Abstract

The invention belongs to the field of photoelectric devices and particularly provides a solar battery with a novel active layer and the preparation method for the solar battery. The solar battery comprises a glass substrate layer (1), an anode layer (2), an anode buffering layer (3), an active layer (4), a cathode interface layer (5) and a cathode layer (6), wherein the anode layer (2), the anode buffering layer (3), the active layer (4), the cathode interface layer (5) and the cathode layer (6) are combined on the glass substrate layer (1) in an attaching mode in sequence. The active layer (4) is composed of a plurality of donor material layers (8) and a plurality of receptor material layers (7). The plurality of donor material layers (8) and the plurality of receptor material layers (7) are arranged perpendicularly to the glass substrate layer (1). The donor material layers (8) and the receptor material layers (7) are alternately combined in an attaching mode, and the thickness a (9) of one donor material layer (8) and one receptor material layer (7) combined with the one donor material layer (8) in an attaching mode is less than or equal to 200nm. By means of the active layer of the solar battery, photoproduction excitons can be locally spread on a D / A interface and decomposed into electrons and electron holes, so that exciton decomposing efficiency is improved, and meanwhile current-carrier mobility is improved.

Description

technical field [0001] The invention belongs to the field of photoelectric devices, and in particular relates to a solar cell with a novel active layer and a preparation method thereof. Background technique [0002] With the development of the world economy, the demand for energy is increasing year by year, and the primary energy sources such as coal and oil are gradually being exhausted. However, solar energy, as a green and environmentally friendly renewable energy, has attracted more and more attention from all countries. [0003] After more than 50 years of development, monocrystalline silicon solar cells have been quite mature, and the energy conversion efficiency has grown from the initial 6% to the current 25%, approaching the theoretical limit of Shockley–Queisser. At the same time, polycrystalline silicon, amorphous silicon, gallium arsenide, indium copper selenium and cadmium telluride thin-film batteries have also been greatly developed, among which polycrystallin...

AI Technical Summary

Problems solved by technology

Since the donor and the acceptor in the heterostructure of the blend system can be regarded as doping with each other, and doping will cause damage to the crystal structure of the material, the photogenerated carriers mainly move on the covalent bonds in the molecule, and move between the molecules Migration is relatively difficult, resulting in the recombination of electrons and holes during the migration process, significantly reducing the mobility of the two-phase material in the blend system, reducing the photogenerated current and reducing the fill factor

Images