Preparation method of ternary organic solar cell

Abstract

The invention discloses a preparation method of a ternary organic solar cell, and belongs to the field of the solar cell. The preparation method comprises the following steps of (1) configuration of an active layer material: taking CB as a solvent, taking PTB7 and a coumarin derivative as a donor material based on the mass ratio of PTB7 to the coumarin derivative of 0.7:0.1-1:0.l; taking PC71BM asan acceptor material at the mass ratio of the donor material to the acceptor material of 1:1-1:3; enabling the donor material, the acceptor material and the solvent to be mixed into an active layer solution with the concentration of 7-15mg / ml; (2) performing ZnO solution configuration; (3) performing cleaning on ITO glass, and then carrying out plasma ozone treatment; (4) spin coating the surfaceof the ITO glass with ZnO, and then carrying out heating and annealing; (5) spin coating the annealed ITO glass with the active layer material, and then carrying out heating and annealing to form anactive layer; and (6) evaporating an MoO<3> layer on the surface of the active layer and then evaporating an Ag electrode. By virtue of the preparation method, efficiency improvement of the device canbe facilitated.

Description

technical field [0001] The invention belongs to the field of organic solar cells. Background technique [0002] The field of organic solar cells has been developed for more than 20 years, and there have been great breakthroughs in both materials and devices, but there is still room for improvement. First of all, most solar cells still use fullerene derivatives as acceptor materials. Fullerene derivatives have good electron transport properties, but there are also some unavoidable defects, such as high purification costs, weak absorption of visible light, and poor adjustment of energy levels. Difficult, poor stability, etc. Non-fullerene acceptor materials have excellent properties, such as strong absorption in the visible and near-infrared regions, easy adjustment of energy levels, and low synthesis and purification costs. It is very important to develop new non-fullerene acceptor materials. The efficiency of non-fullerene solar cells based on polymer donors is developing ...

AI Technical Summary

Problems solved by technology

This patent innovatively proposes to use coumarin in the form of nanowires to be used in organic solar cells. Some studies have shown that the effect of combining coumarin and fullerene PC71BM receptors into a binary device is not ideal, but its application When the binary system based on PTB7:PC71BM constitutes a ternary organic battery, the device efficiency is greatly improved

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