Cathode interface layer material, cathode interface layer coating liquid and organic photovoltaic module

By using modified naphthalenetetracarboxylic dianhydride or perylenetetracarboxylic dianhydride compounds or polymers as cathode interface layer materials, and introducing piperazine groups and dissolving them in common solvents, the problem that cathode interface layer materials are not suitable for large-area soft substrates during high-temperature sintering is solved, achieving efficient energy conversion and good thermal stability.

CN117050303BActive Publication Date: 2026-04-21WAYS TECHNICAL CORP LTD
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Patent Information

Application Number
CN202311026011.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-08-15
Publication Date
2026-04-21
Estimated Expiration
2043-08-15

AI Technical Summary

Technical Problem

Existing organic photovoltaic module cathode interface layer materials are not suitable for large-area soft substrates during high-temperature sintering, and their solubility and thermal stability are insufficient, which limits their applicability.

Method used

Compounds or polymers modified from naphthalenetetracarboxylic dianhydride or perylenetetracarboxylic dianhydride are used as cathode interface layer materials. Piperazine groups are introduced, which can be dissolved in water, methanol, ethanol or isopropanol, and form cathode interface layer coating solution through copolymerization reaction.

Benefits of technology

It improves the energy conversion efficiency and thermal stability of organic photovoltaic modules, is suitable for large-area flexible substrates, and enhances the solubility and thermal stability of materials.

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Abstract

This invention discloses a cathode interface layer material, a cathode interface layer coating solution, and an organic photovoltaic module. The invention provides a compound or polymer modified from naphthalenetetracarboxylic dianhydride or perylenetetracarboxylic dianhydride as a cathode interface layer material. This cathode interface layer material has a piperazine group in its general chemical formula, allowing it to be dissolved in water, methanol, ethanol, isopropanol, or a combination thereof to form a cathode interface layer coating solution. Furthermore, the organic photovoltaic module made using this cathode interface layer material exhibits excellent power conversion efficiency (PCE) and thermal stability.
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