A kind of preparation method of cathode interface layer of thiophene fluorene block conjugated polymer

Abstract

The invention discloses a method for preparing a cathode interface layer of a thiophene fluorene block conjugated polymer. The electrolyte of the thiophene fluorene block conjugated polymer is obtained through Kumada catalyst transfer coupling polymerization. Ni(dppp)Cl with 1,3-bisdiphenylphosphinopropane nickel chloride 2 As a catalyst, the two compounds are polymerized with dry tetrahydrofuran as a solvent to obtain the target neutral block conjugated polymer PT EO - b ‑PF6N. The polymer was settled with n-hexane, dialyzed with a dialysis bag, passed through a column with neutral alumina, and dried to obtain an orange solid. Since the side chains contain polar tertiary amines and alkoxy groups, endowing the thiophene fluorene block conjugated polymer can not only realize the processing of environmentally friendly polar solvents such as water and alcohol, reduce the interface work function of the cathode electrode, and further reduce the active layer and cathode The interfacial barrier between them can improve the morphology of the upper active layer. It can be used as a good cathode interface layer of devices such as OPV, LED and FET.

Description

technical field [0001] The invention relates to the technical field of cathode interface of organic solar cells, in particular to a preparation method of a cathode interface layer of a thiophene fluorene block conjugated polymer. Background technique [0002] Global environmental pollution and energy crisis are becoming more and more serious, and there is an urgent need to develop new renewable energy sources. Compared with other renewable energy sources, solar energy has the advantages of abundant resources, cleanliness, and limited geographical location. Due to the complex production process, expensive production equipment, limited silicon materials, and the conversion efficiency has basically reached the limit of the traditional inorganic silicon battery, its further large-scale commercialization is greatly restricted. On the contrary, the research and development of organic polymer solar cells has made it possible to develop low-cost, large-area organic polymer photovolt...

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Problems solved by technology

[0004] In order to overcome the above-mentioned deficiencies in the prior art, the invention provides a preparation method of a thiophene fluorene block conjugated polymer cathode interface layer; the existing cathode interface layer is a random or alternating conjugated polymer electrolyte, fullerene Alkene derivatives and inorganic zinc oxide, etc., these cathode interfacial layers cannot simultaneously solve the problems of active layer morphology and interfacial barrier

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