Organic solar cell with exciton blocking and sunlight sensitivity enhancing integrated type hole transport layer and preparation method of organic solar cell

Abstract

The invention discloses an organic solar cell with an exciton blocking and sunlight sensitivity enhancing integrated type hole transport layer and a preparation method of the organic solar cell. The organic solar cell comprises a substrate, a transparent electrode, a hole injection layer, an exciton blocking layer, a donor layer, a receptor layer, an electronic transmitting layer and a negative electrode. The organic solar cell is characterized in that the exciton blocking layer can effectively block electrons at a positive electrode end through material matching, and dark current components and electron leakage currents of a photovoltaic cell are reduced; ultraviolet light in sunlight can be absorbed for emitting pure blue light or sky blue light, and the number of incidence photons of an active layer of the subsequent organic solar cell is increased. Photo-generated currents are increased for improving the power conversion efficiency of a photovoltaic cell. The organic solar cell achieves dual functions of exciton blocking and sunlight enhancing at the same time through a simple method without other additional optical design or complex processes. The organic solar cell is simple in preparation process, low in device requirement and suitable for mass production.

Description

technical field [0001] The invention relates to an organic optoelectronic device and a preparation method thereof, in particular to an organic solar cell (OPV) and a preparation method thereof, which are applied in the technical field of green solar energy. Background technique [0002] Organic optoelectronic technology is one of the high-tech technologies that have developed rapidly in the world's academic circles in the past 10 years. With the rapid development of film-forming technology and the diversity of design of organic materials or organic / inorganic hybrid materials, organic optoelectronic products such as organic electroluminescent devices, organic photovoltaic cells (OPV), organic field effect transistors, etc. are gradually mature. And it has the advantages of easy large-area preparation, flexibility, shock resistance and the like. Among them, organic solar cells using clean energy have attracted much attention in the field of energy technology due to their adva...

AI Technical Summary

Problems solved by technology

[0005] 2. The donor / acceptor exciton separation in traditional planar heterojunction cells is insufficient, resulting in low short-circuit current;

[0006] 3. The morphology and structure of the bulk heterojunction are complex, it is difficult to accurately control, and there are many unknown mechanisms;

[0007] 4. The injection and transport rates of holes and electrons do not match, resulting in the limitation of the final photogenerated current

[0008] The traditional hole injection or transport material in OPV is poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)(PEDOT:PSS), which has an excellent smooth conductive substrate, suppresses leakage current and obtains a higher open circuit voltage, but at the same time It is also a strong exciton quencher, which affects the promotion of OPV in real-world applications

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