Electro-photovoltaics of grignard metathesis-derived poly(propylene imine) tetra(salicylaldimine)-co-poly(3-hexylthiophene-2,5-diyl) copolymer

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics Pub Date : 2025-02-16 DOI:10.1016/j.matchemphys.2025.130549

Morongwa E. Ramoroka , Hayelom H. Tesfay , Precious Ekwere , Kefilwe V. Mokwebo , Vivian S. John-Denk , Kwena D. Modibane , Samantha F. Douman , Emmanuel I. Iwuoha

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引用次数: 0

Abstract

End-functionalization of polymers and synthesis of copolymers has been reported to be an effective method in tuning intermolecular interactions and electronic energy levels, which is extremely vital for improving the power conversion efficiency (PCE) of organic photovoltaic cells (OPVs). In this work, in-situ synthesis of novel dendritic poly(propylene imine) tetra(salicylaldimine)-co-poly(3-hexylthiophene-2,5-diyl) (P3HT-PSL) copolymer by Grignard metathesis is reported. Prior to performing Grignard metathesis, the poly(propylene imine) tetra(salicylaldimine) (PPI-SL) dendritic core material was synthesized using Schiff base condensation. It is noteworthy that this Grignard metathesis has never been used to grow a linear polymer chain on the four branches of dendritic core material. The properties of synthesized PPI-SL and P3HT-PSL were studied by Fourier-transform infrared (FTIR), small angle X-rays scattering (SAXS), thermal gravimetric analysis (TGA), nuclear magnetic resonance (NMR), ultraviolet–visible spectroscopy (UV–Vis), electrochemical impedance spectroscopy (EIS), photoluminescence (PL), and cyclic voltammetry (CV). Effect of poly(3-hexylthiophene-2,5-diyl) (P3HT) chains on the PPI-SL branches were investigated. The formation of P3HT-PSL was confirmed by NMR, FTIR, TGA, and UV–Vis spectroscopy. Synthesized materials were used as donor materials for OPVs and champion PCE of 0.24 % was achieved for P3HT-PSL based OPV. This work uncovers a new avenue for synthesis of organic donor materials for use in OPVs.

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来源期刊

Materials Chemistry and Physics 工程技术-材料科学：综合

CiteScore

8.70

自引率

4.30%

发文量

1515

审稿时长

69 days

期刊介绍： Materials Chemistry and Physics is devoted to short communications, full-length research papers and feature articles on interrelationships among structure, properties, processing and performance of materials. The Editors welcome manuscripts on thin films, surface and interface science, materials degradation and reliability, metallurgy, semiconductors and optoelectronic materials, fine ceramics, magnetics, superconductors, specialty polymers, nano-materials and composite materials.