J-Aggregate Behavior of Poly[(9,9-dioctyluorenyl-2,7-diyl)-alt-co-(bithiophene)] (F8T2) in Crystal and Liquid Crystal Phases

被引：5

作者：

Ma, Tengning ^{[1
]}

Wang, Zhixiang ^{[1
]}

Song, Chongping ^{[1
]}

Song, Ningning ^{[2
]}

Ren, Jiaxuan ^{[1
]}

Liu, Bin ^{[1
]}

Zhang, Hao ^{[1
]}

Zhang, Houyu ^{[1
]}

Lu, Dan ^{[1
]}

机构：

[1] Jilin Univ, State Key Lab Supramol Struct & Mat, Changchun 130012, Jilin, Peoples R China

[2] Jilin Univ, Coll Chem, Natl Local Joint Engn Lab Synth Technol High Perf, Changchun 130012, Jilin, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2019年 / 123卷 / 39期

关键词：

CHARGE-TRANSPORT; PHOTOVOLTAIC PROPERTIES; CONJUGATED POLYMERS; THIN-FILMS; MOBILITY; MICROSTRUCTURE; TRANSITION; MORPHOLOGY; EFFICIENT; DISORDER;

D O I：

10.1021/acs.jpcc.9b07311

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Poly [(9,9-dioctylfluorenyl-2,7-diyl)-alt-co-(bithiophene)] (F8T2) in thermally annealed films exhibits red-shifted absorption spectra, which shows the typical feature of the J-aggregate and is confirmed by computational simulations. By controlling the annealing temperature, the aggregate behavior is explored in detail. It is found that the J-aggregate is formed only when the material is annealed at crystallization and liquid crystal temperatures. The microstructure and morphology of the aggregates show that the J-aggregates have tighter chain packing and a larger ordered domain. This work first demonstrates the Jaggregate behavior of the F8T2 material and establishes the relationship between optical spectra and the packing structure of F8T2.

引用

页码：24321 / 24327

页数：7

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