Effect of the side-chain size on the optical and electrical properties of confined-PPV derivatives

被引：8

作者：

Benzarti-Ghedira, Maha ^{[1
]}

Hrichi, Haikel ^{[1
]}

Jaballah, Nejmeddine ^{[1
]}

Ben Chaabane, Rafik ^{[1
]}

Majdoub, Mustapha ^{[1
]}

Ben Ouda, Hafedh ^{[1
]}

机构：

[1] Fac Sci Monastir, LIMA, Monastir 5019, Tunisia

来源：

SUPERLATTICES AND MICROSTRUCTURES | 2015年 / 85卷

关键词：

Semi-conducting polymers; Poly(p-phenylene vinylene (R); pi-pi interaction; Space-charge-limited current (SCLC); I-V characteristics; Impedance spectroscopy (IS); HOLE MOBILITIES; FIELD; PERFORMANCE; CONDUCTION; COPOLYMER; ABSORPTION; MORPHOLOGY; TRANSPORT; DISORDER; LAYER;

D O I：

10.1016/j.spmi.2015.05.006

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We have investigated the influence of side-chain size on the optical and charge transport behavior of thin layers of new conjugated polymers based on separated PPV-type chromophores (P1, P2 and P3). The polymers are soluble in common organic solvents. The optical properties of these materials were investigated by UV-Vis absorption and PL spectroscopy. In thin solid films, the polymers show side-group dependent optical behavior; the PL spectra of polymers P2 and P3 showed a blue emission, whereas a green emission was observed for the polymer P1. The optical gaps of these thin layers have been estimated to be 2.93, 2.96 and 2.98 eV for P1, P2 and P3, respectively. The optical study showed a stronger it pi-pi interaction in the P1 film. The electrical properties of ITO/PPV derivative/AI diodes base on these PPV derivatives were investigated by the current/tension characteristics and modeled by the current space-charge-limited (SCLC) mechanism; a higher mobility was obtained in the P2 thin layer. The morphology of the polymer films was studied and correlated to the optical and electrical properties. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：469 / 481

页数：13

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