Jarka Paweł, Hajduk Barbara, Kumari Pallavi, Janeczek Henryk, Godzierz Marcin, Tsekpo Yao Mawuena, Tański Tomasz
Department of Engineering Materials and Biomaterials, Silesian University of Technology, 18a Konarskiego Str., 41-100 Gliwice, Poland.
Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34 Marie Curie-Skłodowska Str., 41-819 Zabrze, Poland.
Polymers (Basel). 2025 Mar 6;17(5):704. doi: 10.3390/polym17050704.
Herein, we report a comprehensive investigation on the thermal transitions of thin films of poly [2,5-bis(2-octyldodecyl)pyrrolo[3,4-c]pyrrole-1,4(2H,5H)-dione -3,6-diyl)-alt-(2,2';5',2″;5″,2'″-quaterthiophen-5,5'″-diyl)]PDPP4T, poly[2,6-(4,4-bis-(2-ethy-lhexyl)-4H-cyclopenta [2,1-b;3,4-b']dithiophene)-alt-4,7(2,1,3-benzothiadiazole)] PCPDTBT, 1:1 blend of PDPP4T and PCPDTBT, and their composites with gold nanoparticles (AuNPs). The thermal transitions of these materials were studied using variable temperature spectroscopic ellipsometry (VTSE), with differential scanning calorimetry (DSC) serving as the reference method. Based on obtained VTSE results, for the first time, we have determined the phase diagrams of PDPP4T/PCPDTBT and their AuNPs composites. The VTSE measurements revealed distinct thermal transitions in the thin films, including characteristic temperatures corresponding to the pure phases of PDPP4T and PCPDTBT within their blends. These transitions were markedly different in the AuNPs composites compared to the neat materials, highlighting the unique interactions between the polymer matrix and AuNPs. Additionally, we explored the optical properties, surface morphology, and crystallinity of the materials. We hypothesize that the observed variations in thermal transitions, as well as the improvement in optical properties and crystallinity, are likely influenced by localized surface plasmon resonance (LSPR) and passivation phenomena induced by the AuNPs in the composite films. These findings could have important implications for the design and optimization of materials for optoelectronic applications.
在此，我们报告了对聚[2,5-双(2-辛基十二烷基)吡咯并[3,4-c]吡咯-1,4(2H,5H)-二酮-3,6-二亚基)-alt-(2,2';5',2″;5″,2'″-四噻吩-5,5'″-二亚基)]（PDPP4T）、聚[2,6-(4,4-双-(2-乙基己基)-4H-环戊并[2,1-b;3,4-b']二噻吩)-alt-4,7(2,1,3-苯并噻二唑)]（PCPDTBT）、PDPP4T与PCPDTBT的1:1共混物及其与金纳米颗粒（AuNPs）的复合材料薄膜热转变的全面研究。使用变温光谱椭偏仪（VTSE）研究了这些材料的热转变，差示扫描量热法（DSC）作为参考方法。基于获得的VTSE结果，我们首次确定了PDPP4T/PCPDTBT及其AuNPs复合材料的相图。VTSE测量揭示了薄膜中明显的热转变，包括与共混物中PDPP4T和PCPDTBT纯相相对应的特征温度。与纯材料相比，AuNPs复合材料中的这些转变明显不同，突出了聚合物基质与AuNPs之间独特的相互作用。此外，我们还研究了材料的光学性质、表面形态和结晶度。我们假设观察到的热转变变化以及光学性质和结晶度的改善可能受到复合薄膜中AuNPs诱导的局域表面等离子体共振（LSPR）和钝化现象的影响。这些发现可能对光电子应用材料的设计和优化具有重要意义。
