Highly Polarized Luminescence from β-Phase-Rich Poly(9,9-dioctylfluorene) Nanofibers

被引：8
|
作者：
Iacopino, Daniela [1 ]
Lovera, Pierre [1 ]
O'Riordan, Alan [1 ]
Redmond, Gareth [2 ]
机构：
[1] Natl Univ Ireland Univ Coll Cork, Tyndall Natl Inst, Cork, Ireland
[2] Univ Coll Dublin, Sch Phys, Dublin 2, Ireland
来源：
JOURNAL OF PHYSICAL CHEMISTRY A | 2014年 / 118卷 / 29期
关键词：
LIQUID-CRYSTALLINE POLYFLUORENE; CONJUGATED POLYMER NANOWIRES; MOBILITY ENHANCEMENT; OPTICAL GAIN; SOLAR-CELLS; ALIGNMENT; FILMS; MORPHOLOGY; EFFICIENCY; ANISOTROPY;
D O I：
10.1021/jp505689y
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：
Novel poly(9,9-dioctlylfluorene) (PFO) nanofibers were fabricated by solution template wetting of anodic aluminum oxide (AAO) templates with a pore diameter of 25 nm. Individual nanofibers displayed a pronounced axially polarized luminescence with a typical emission dichroic ratio of 15 and low spread of the emissive species angular distribution. The strong optical characteristics were ascribed to intrachain reorientation of amorphous PFO to a more planar and elongated beta-phase conformation induced by mechanical strain during polymer template pore infiltration. Absorption optical spectroscopy on nanofiber mats confirmed formation of 24% beta-phase emissive segments, which dominated the nanofiber luminescence characteristics. X-ray diffraction measurements were used to confirm and quantify the extent of nanofiber internal molecular alignment.
引用
收藏
页码：5437 / 5442
页数：6
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