Ternary solar cell doped with ultraviolet absorption organic molecules and preparation method

Abstract

The invention relates to the technical field of organic semiconductor thin film solar cells, and particularly discloses a ternary solar cell doped with ultraviolet absorption organic molecules and a preparation method. According to the ternary solar cell doped with the ultraviolet absorption organic molecules, a substrate, an ITO transparent conductive cathode layer, a ZnO cathode buffer layer, aphotoactive layer, an anode buffer layer and a metal anode layer are sequentially arranged from bottom to top, wherein the photoactive layer is that based on a traditional PTB7: PC71BM system, a smallamount of ultraviolet absorption materials of phenyl salicylate are doped, the absorption spectrum of an active layer is greatly broadened, and the photo absorption ability of the active layer is enhanced; the morphology of the active layer is improved, the surface roughness is decreased, and the contact between the active layer and a transport layer is optimized; and meanwhile the carrier mobility of the active layer is further increased, the charge transfer in a device is promoted, the transfer efficiency of a photon-generated carrier is greatly improved, the short-circuit current is improved, and finally the performance of the whole organic solar cell is improved.

Description

technical field [0001] The invention belongs to the technical field of organic semiconductor thin film solar cells, in particular to a ternary solar cell doped with ultraviolet absorbing organic molecules and a preparation method thereof. Background technique [0002] The development of human society is inseparable from energy, and the effective exploitation and utilization of energy has always been the goal pursued by human beings. At present, most of the energy used in the world comes from the exploitation of fossil fuels, which mainly include oil, natural gas and coal. However, on the one hand, the use of fossil energy will cause a lot of environmental pollution, on the other hand, these resources are non-renewable and limited, so finding new alternative energy has become an urgent problem for human beings to solve. Considering that solar energy is inexhaustible, inexhaustible, and non-polluting, scientists from all over the world regard the development and utilization o...

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Problems solved by technology

[0004] In previous experiments on the photoelectric efficiency of organic solar cells, the active layer materials generally only involved the absorption of visible light bands, focusing on continuously improving the device’s ability to absorb visible light, but there were few studies on the energy utilization of short-wave band light. The prepared traditional active layer generally has the problems of low carrier mobility and defects in morphology.

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