Dimitriev Oleg P
V. Lashkaryov Institute of Semiconductor Physics, Natl. Acad. of Sci. of Ukraine, Prospect Nauki, 41, Kiev, 03028, Ukraine.
Nanoscale Res Lett. 2017 Aug 29;12(1):510. doi: 10.1186/s11671-017-2270-y.
The influence of arrangement of poly(3-hexylthiophene) (P3HT) chains embedded into poly(methyl methacrylate) (PMMA) matrix on photophysical properties, such as electronic absorption spectrum, band gap, and photoluminescence quantum yield, of the formed P3HT aggregates have been studied. It has been found that variation of P3HT fraction in PMMA matrix from 25 to 2 wt% is accompanied with the increasing quantum yield of photoluminescence, red shift of the band gap, and structural change of P3HT crystallites. The above changes are accompanied with disruption of the continuous network of P3HT fraction into smaller P3HT particles with size ranged from several microns to several tens of nanometers. The results are interpreted in terms of the changing intermolecular packing and reduced intramolecular torsional disorder. It is discussed that the most contribution to the above changes comes from P3HT molecules at the interface of P3HT cluster and PMMA environment.
研究了嵌入聚甲基丙烯酸甲酯（PMMA）基体中的聚（3-己基噻吩）（P3HT）链的排列对所形成的P3HT聚集体的光物理性质（如电子吸收光谱、带隙和光致发光量子产率）的影响。已发现，PMMA基体中P3HT组分的比例从25 wt%变化到2 wt%时，伴随着光致发光量子产率的增加、带隙的红移以及P3HT微晶的结构变化。上述变化伴随着P3HT组分的连续网络被破坏成尺寸范围从几微米到几十纳米的较小P3HT颗粒。根据分子间堆积的变化和分子内扭转无序的减少对结果进行了解释。讨论了上述变化的最大贡献来自P3HT簇与PMMA环境界面处的P3HT分子。
