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Application of amino acid group-containing zwitterionic conjugated polyelectrolyte with hole transporting property

A technology of conjugated polyelectrolyte and amphoteric ions, which is applied in circuits, photovoltaic power generation, electrical components, etc., can solve the problems of energy loss, low photoelectric conversion efficiency, and low HOMO energy level of perovskite solar cells

Active Publication Date: 2019-11-05
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PEDOT: PSS has poor charge transfer in the out-of-plane direction, and the HOMO energy level is low, resulting in energy loss in perovskite solar cells, and the corresponding photoelectric conversion efficiency is relatively low

Method used

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  • Application of amino acid group-containing zwitterionic conjugated polyelectrolyte with hole transporting property
  • Application of amino acid group-containing zwitterionic conjugated polyelectrolyte with hole transporting property
  • Application of amino acid group-containing zwitterionic conjugated polyelectrolyte with hole transporting property

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0019] The route of polymer POWT is as follows:

[0020]

[0021] (1) Synthesis of 2-(3'-thienyl)ethanol

[0022]

[0023] 200 ml of tetrahydrofuran was added into a 500 ml two-necked flask, lithium aluminum hydride (4.56 g, 0.12 mol) was added dropwise into tetrahydrofuran, and stirred at 0°C. 2-(3'-thienyl)acetic acid (14.2 g, 0.1 mol) was dissolved in 100 ml of tetrahydrofuran, and added dropwise to the reaction flask at this temperature. After the addition, the reaction mixture was stirred at 0 °C for 2 hours. 200ml of ethyl acetate was slowly added to the reaction mixture, and then 5ml of water was added to quench the reaction. The suspension was filtered, and the filtrate was dried over anhydrous sodium sulfate and concentrated to give 2-(3'-thienyl)ethanol (12.44 g, yield: 99%). 1 H NMR (300MHz, CDCl 3 )δ7.33-7.27(m, 1H), 7.11-7.02(m, 1H), 6.98(d, J=4.1Hz, 1H), 3.85(t, J=6.4Hz, 2H), 2.91(t, J = 6.4Hz, 2H).

[0024] (2) Synthesis of 2-(3'-thienyl) ethyl p-tol...

Embodiment example 2

[0034] Preparation and Characterization of Perovskite Solar Cells:

[0035] (1) Use dilute hydrochloric acid and zinc powder to etch a 1.5cm x 1.5cm ITO substrate. After etching, wipe it with a cotton ball, rinse it with water, and ultrasonically clean the surface with deionized water, acetone, and isopropanol for 15 minutes. Nitrogen blow dry, UV-O 3 Moderate irradiation for 20min.

[0036] (2) Standard device ITO / PEDOT: PSS / FA 0.2 MA 0.8 PB 2.9 Br 0.1 / C 60 Preparation of / BCP / Ag:

[0037] Spin-coat PEDOT:PSS onto the treated ITO substrate first, and anneal at 120°C for 30 minutes; then the configured PbI 2 The GBL / DMSO mixed solution of MABr, MAI and FAI was spin-coated on the zwitterionic conjugated polyelectrolyte film, and annealed at 60°C for 30s and 100°C for 30s; finally, C 60 , BCP buffer layer and Ag electrode are vapor-deposited.

[0038] (3) Battery ITO / POWT / FA with POWT as hole transport material 0.2 MA 0.8 PB 2.9 Br 0.1 / C 60 / BCP / Ag preparation:

...

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Abstract

An amino acid group-containing zwitterionic conjugated polyelectrolyte developed in the invention has the advantages of high stability, good solubility and energy level matching, has obvious advantages in perovskite solar cells than a conventional hole transport material PEDOT:PSS, and has potential and broad application prospects in the electronic fields such as perovskite solar cells, organic solar cells and organic light-emitting diodes.

Description

technical field [0001] The invention relates to a zwitterionic conjugated polyelectrolyte with amino acid groups as a hole transport material and its application in perovskite solar cells. Background technique [0002] Perovskite solar cells have achieved rapid development since they were proposed in 2009. In just a few years, the photoelectric conversion efficiency has soared, and its performance even surpassed other types of cells accumulated over the years. One of the top ten scientific and technological advances in the world, it has become one of the research hotspots of new solar cells. Hole transport materials are an important part of perovskite solar cells and play an irreplaceable role in the current generation process. The basic structure of reverse perovskite solar cells is ITO / hole transport layer / CH 3 NH 3 wxya 3 / Electron transport layer / Metal electrode, PEDOT:PSS is the most commonly used hole transport material. PEDOT:PSS has poor charge transfer in the o...

Claims

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Application Information

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IPC IPC(8): C08G61/12H01L51/42H01L51/46H01L51/48
CPCC08G61/126C08G2261/11C08G2261/143C08G2261/3223H10K71/12H10K71/40H10K85/113H10K30/10Y02E10/549
Inventor 高德青郇义红谭超冯兴翠黄维
Owner NANJING UNIV OF TECH
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