Biobased Thermoset Substrate for Flexible and Sustainable Organic Photovoltaics

Author:

Tian Jingfu1,You Yang1,Zhou Han1,Li Haojie2,Hu Lin3,Tian Yaozhu1,Xie Haibo1,Xie Yuanpeng1,Hu Xiaotian2ORCID

Affiliation:

1. College of Materials and Metallurgy Guizhou University Guiyang 550025 China

2. College of Chemistry and Chemical Engineering Nanchang University Nanchang 330031 China

3. China‐Australia Institute for Advanced Materials and Manufacturing (IAMM) Jiaxing University Jiaxing 314001 China

Abstract

AbstractToward a sustainable development of the flexible electronics industry, the design and facile preparation of sustainable flexible substrates with satisfactory mechanical properties and transparency is still a challenge. Herein, taking structural advantages of biobased eugenol and vanillin, a polymerizable aromatic carbonate monomer with α,ω‐diene functionality (2E), and a robust aromatic acetal monomer with α,ω‐tetraene functionality (4E), are designed and prepared. Then, they are cross‐linked with pentaerythritol tetrakis(2‐mercaptoacetate) (4SH) via thiol‐ene click reaction to generate a series of ternary poly(thioether carbonate acetal) thermosets. It is found that the introduction of 4E allows the production of thiol‐ene thermosets with higher crosslink density, which can balance their mechanical, optical, and surface properties. In addition, the thermoset shows good resistance against various natural environmental conditions and can be decomposed into recyclable small molecules under harsher conditions (3 m NaOH, 80 °C). As a result, the optimal thermoset is well‐suited for the fabrication of flexible organic solar cells (OSCs), yielding a power conversion efficiency of 15.41%, which is superior to polyethylene terephthalate‐based OSC. The results provided significant insights for the design and preparation of sustainable polymer substrates for OSCs, even flexible electronics.

Funder

National Natural Science Foundation of China

Guizhou Science and Technology Corporation Platform Talents Fund

Publisher

Wiley

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