Zwitterion modified tetraphenylethylene, preparation method and application thereof

A technology of tetraphenylethylene and zwitterions, which is applied in the field of zwitterion-modified tetraphenylethylene and its preparation and application, can solve problems such as unclear interface modification layers, and achieve avoidance of adverse effects, excellent interface modification effects, and improved conductivity Effect

Active Publication Date: 2017-03-22
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the researchers' understanding of the mechanism behind the interface modification layer is still unclear. Two types of CILs with completely different conjugated structures have good interface modification effects; in addition, CILs composed of π-conjugated units other than fluorene units There are very few reports on materials, and there will be π-π stacking between molecules in the solid state

Method used

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  • Zwitterion modified tetraphenylethylene, preparation method and application thereof
  • Zwitterion modified tetraphenylethylene, preparation method and application thereof
  • Zwitterion modified tetraphenylethylene, preparation method and application thereof

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Embodiment 1

[0027] The synthesis of embodiment 1 compound 1-8

[0028] (1) Under a nitrogen atmosphere, add diphenylmethane (3.36g, 20mmol) and 80mL dry tetrahydrofuran into a Schlenk tube, add a 2.2M hexane solution of n-butyllithium (9.1mL, 20mmol) dropwise at 0°C, and Add 4-methoxybenzoylbenzene ( 3.40g, 16mmol), and continued to stir for 6 hours after naturally warming to room temperature. After completion of the reaction, add saturated aqueous ammonium chloride to quench the reaction, extract with dichloromethane, collect the organic phase, and wash with anhydrous Na 2 SO 4 After drying, the solvent was distilled off to obtain the intermediate crude product. The intermediate was dissolved in 80 mL of dry toluene in a 250 mL round bottom flask, a catalytic amount of p-toluenesulfonic acid monohydrate (570 mg, 3.0 mmol) was added, and refluxed for 12 hours. After the completion of the reaction, cool to room temperature and use 10wt% NaHCO 3 Wash the toluene solution with aqueous ...

Embodiment 2

[0037] Embodiment 2: Compound 4 and 8 are used as the device effect of the cathode interface modification material of polymer solar cell

[0038] Aluminum is used as the cathode, compounds 4 and 8 are used as the interface modification layer of the aluminum electrode, and PTB7 is used as the active layer donor material, and the structural formula is Among them, R is PC 71 BM is used as the acceptor material of the active layer, and its structural formula is Poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) (PEDOT:PSS) is used as the interface modification layer of the anode, and the structural formula is ITO glass was used as the anode. As a comparison, a device without a cathode interface modification layer and calcium as a cathode interface modification layer was also fabricated.

[0039] Compounds 4 and 8 of the present invention are used as cathode interface modification materials for bulk heterojunction polymer solar cells. With compound 4 cathode inter...

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Abstract

The invention discloses a zwitterion modified tetraphenylethylene, a preparation method and application thereof. The zwitterion modified tetraphenylethylene has a structure shown as formula (I) or formula (II), and is the first polymer solar cell interface modified material with aggregation-induced emission properties. The invention utilizes the compound tetraphenylethylene with aggregation-induced emission properties to construct a cathodic interface modification material, a pi unit is introduced to improve the electrical conductivity, and also the adverse impact brought about by intermolecular pi-pi stacking can be avoided. The material shows excellent interface modification effect in a traditional structure single-layer polymer solar cell device based on PTB7 and PC71BM serving as the active layer and aluminum serving as the cathode, and the highest energy conversion efficiency reaches 8.94%.

Description

technical field [0001] The invention relates to a zwitterion-modified tetraphenylethylene, a synthesis method thereof and an application as a cathode interface modification material of a bulk heterojunction polymer solar cell. Background technique [0002] In recent years, bulk heterojunction (BHJ) polymer solar cells (PSCs) have developed rapidly. With the great progress in the development of active layer materials, the optimization of device structure and interface technology, the device power conversion efficiency (PCE ) has broken through 11%. Generally speaking, the PSCs device structure is a "sandwich" structure composed of active layers (conjugated polymer donors and fullerene derivative acceptors) sandwiched between cathodes, anodes and corresponding interface layers. Therefore, how to pass Improved interface modification layer reduces the barrier of charge separation / collection to form ohmic contact and improve PCE, which has attracted more and more attention of re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/32C07C309/14C09K11/06H01L51/42H01L51/46
CPCC09K11/06C07C37/055C07C41/30C07C213/00C07C303/32C07C309/14H10K85/00H10K30/81C07C217/06C07C39/21C07C43/215Y02E10/549Y02P70/50
Inventor 李振王灿葛子义刘志洋
Owner WUHAN UNIV
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