Preparation method of hyperbranched conjugate polymer electrolyte cathode interface layer containing quaternium terminal ion groups

Abstract

The invention discloses a preparation method of a hyperbranched conjugate polymer electrolyte cathode interface layer containing quaternium terminal ion groups. Firstly, 2,7-dibromo-9-(6-bromohexane)carbazole and tris-[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-amine are subjected to a coupling reaction to obtain the hyperbranched conjugate polymer, the polymer reacts with a tetrahydrofuran solution of trimethylamine to be ionized to obtain the target hyperbranched conjugate polymer electrolyte. Due to the fact that multiple alkyl quaternium side chains are contained, the polymercan form interface dipoles, the interface barrier is lowered, and environment-friendly water / alcohol dissolubility processing is achieved. Meanwhile, the hyperbranched conjugate polymer electrolyte can be subjected to the high interface interaction with a lower layer substrate due to the hyper branched characteristics to form ordered arrangement through self-assembling, then, an upper layer active layer is induced to form ordered arrangement, the problem that the morphology of the active layer is poor is solved, the carrier mobility is improved, and therefore the short-circuit current and a filling factor of the device are improved, and finally the photoelectric conversion efficiency of the device is improved.

Description

technical field [0001] The invention relates to the technical field of organic solar cell cathode interface layer, in particular to a preparation method of a hyperbranched conjugated polymer electrolyte cathode interface layer containing quaternary ammonium salt terminal ion groups. Background technique [0002] With the increasing global demand for energy and increasingly serious environmental pollution problems, solar energy, as a clean, renewable and abundant green energy, has attracted more and more attention. Solar cells are one of the most important and convenient ways of solar energy storage, which mainly include inorganic solar cells and organic solar cells. Compared with expensive and bulky inorganic solar cells, organic solar cells have the advantages of low manufacturing cost, good flexibility, simple preparation process, large manufacturing area, low price, and light weight, especially organic solar cells prepared by printing technology , can really solve the pr...

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Problems solved by technology

Existing cathode interfacial layers mainly include metal fluorides, n-type metal oxides, organic small molecules, electrolytes, and fullerenes, etc. These interfacial layers cannot simultaneously solve the active layer morphology and carrier mobility. low two questions

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