Production method of novel hyperbranched sodium sulfonate small-molecular electron transfer layer

Abstract

The invention discloses a production method of a novel hyperbranched sodium sulfonate small-molecular electron transfer layer. The above hyperbranched sodium sulfonate small-molecular electrolyte is prepared through a one-step simple reaction. The production method comprises the following steps: adding tetraethylenepentamine into a dried tetrahydrofuran solution, adding NaH in ice bath and nitrogen atmosphere, performing room temperature stirring for 2 h, rising the temperature of the obtained reaction solution to 50 DEG C, reacting the reaction solution overnight, adding excess 1,4-butanesultone through a constant-pressure dropping funnel, cooling the obtained solution to room temperature after the reaction is finished, performing suction filtration, collecting obtained filter residues, dissolving the filter residues in deionized water, and performing dialysis purification by a dialysis bag with the aperture being 1000 in order to obtain the pale yellow target product PNSO3Na. A hyperbranched side chain polar group makes the small molecule realize processing of water, alcohol and other environmentally-friendly polar solvents and form an interface dipole, so the water content is reduced, and the interface contact is improved. The novel hyperbranched sodium sulfonate small-molecular electron transfer layer can be used as a good cathode interface layer for photovoltaic cells, LEDs and FETs.

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 a novel hyperbranched sodium sulfonate small molecule electron transport layer. Background technique [0002] With the increasing global environmental pollution and energy crisis, it is imminent to develop new renewable energy. Among the many renewable energies, solar energy is unique, with the advantages of abundant resources, cleanliness and universality. Due to the complex production process, expensive production equipment, limited silicon materials, and the conversion efficiency has basically reached the limit of traditional inorganic silicon solar cells, it limits its further industrialization and expansion of production. On the contrary, organic polymer solar cells have the advantages of high quality, low cost, solution printing production and controllable structure, which have aroused widespread interest of ...

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Problems solved by technology

[0005] In order to overcome the above-mentioned deficiencies in the prior art, the invention provides a preparation method of hyperbranched sodium sulfonate small molecule electron transport layer; the existing electron transport layer is random or alternating conjugated polymer electrolyte, fullerene derivative , small molecule electrolytes and inorganic zinc oxide, etc., these electron transport layers cannot solve the problem of active layer morphology and interface barrier at the same time and achieve environmental friendly processing and simple preparation process

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