Preparation method of hyperbranched conjugated polymer electrolyte electron transport layer

Abstract

The invention discloses a preparation method of a hyperbranched conjugated polymer electrolyte electron transport layer. For the first time, 2,7-dibromo-9,9'-di(1-sodium sulfonate butyl)fluorene and tris-[4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-phenyl]-amine are subjected to a simple Suzuki coupling reaction to prepare a conjugated polymer electrolyte of fluorene containing a hyperbranched sodium sulfonate polar side chain and triphenylamine. Due to containing a plurality of polar sodium sulfonate side chains, the polymer can form dipoles at an interface, the interface potential barrier is reduced, the interface contact is improved, and the polymer can realize environment-friendly water / alcohol soluble processing. In addition, due to the hyperbranched property of the hyperbranchedpolymer (containing a plurality of polar side chains), a strong interfacial interaction between the hyperbranched polymer and an underlying substrate can occur to self-assemble into ordered arrays, then an upper active layer is induced to form ordered arrays by using the hyperbranched polymer as a template, the problem of poor morphology of the active layer is solved, and the carrier mobility canbe improved, so that the short-circuit current and the filling factor of a device is improved, and finally the device efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of electron transport layers of organic solar cells, in particular to a preparation method of hyperbranched conjugated polymer electrolyte electron transport layers. Background technique [0002] With the continuous development of the global economy, the increasing demand for energy and the increasingly serious environmental pollution, it is urgent for people to find a clean and renewable energy. Among them, solar energy is widely distributed because it is not restricted by geographical conditions, and solar energy, as an inexhaustible green new energy, has attracted more and more attention and attention, and scientific and rational development and utilization of solar energy has become a current research topic. As a hotspot, solar cells are currently the most important and convenient way to apply solar energy. [0003] Although inorganic silicon solar cells are currently the most widely used type of batter...

AI Technical Summary

Problems solved by technology

The existing electron transport layers are random or alternating water-soluble conjugated polymer electrolytes, fullerene derivatives, and inorganic zinc oxide, etc. These electron transport layers cannot simultaneously solve the problems of interface barriers and poor morphology of the active layer

Secondly: hyperbranched polymers can self-assemble into an ordered arrangement due to their hyperbranched characteristics (containing multiple polar side chains) through strong interfacial interactions with the underlying substrate, which can be used as a template to further induce the formation of an orderly active layer in the upper layer. Arrangement, solve the problem of poor morphology of the active layer, improve carrier mobility, thereby improving the short-circuit current and fill factor of the device, and ultimately improve the photoelectric conversion efficiency of the device

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