Very Large Photoconduction Enhancement Upon Self-Assembly of a New Triindole Derivative in Solution-Processed Films

被引：30

作者：

Gallego-Gomez, Francisco ^{[1
,2
,3
]}

Garcia-Frutos, Eva M. ^{[1
]}

Villalvilla, Jose M. ^{[2
,3
]}

Quintana, Jose A. ^{[2
,3
]}

Gutierrez-Puebla, Enrique ^{[1
]}

Monge, Angeles ^{[1
]}

Diaz-Garcia, Maria A. ^{[2
,3
]}

Gomez-Lor, Berta ^{[1
]}

机构：

[1] CSIC, Inst Ciencia Mat, Madrid 28049, Spain

[2] Univ Alicante, Inst Univ Mat Alicante, E-03080 Alicante, Spain

[3] Univ Alicante, Dept Fis Aplicada, E-03080 Alicante, Spain

来源：

ADVANCED FUNCTIONAL MATERIALS | 2011年 / 21卷 / 04期

关键词：

SPECTRAL RESPONSE; ELECTRONICS; PHOTODETECTORS; TRIAZATRUXENE; ORGANIZATION; TRANSISTORS; GENERATION; DENDRIMERS; NANOTUBES; POLYMERS;

D O I：

10.1002/adfm.201000956

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A new carbazole-related small molecule exhibiting self-assembly into ordered nanostructures in solution-processed cast films has been synthesized and its charge-photogeneration and -transport properties have been investigated. Large photoconductivity was measured in the amorphous state while an enormous improvement in the photoconduction properties was observed when the molecules spontaneously organized. Photocurrents increased upon self-assembly by up to four orders of magnitude, mostly due to the drastic enhancement of the charge photogeneration. A greatly favorable arrangement of the aromatic cores in the resulting nanostructures, which were characterized by X-ray analysis, may explain these improvements. Photocurrents of mA cm(-2), on/off ratios of 10(4) and quantum efficiencies of unity at low field and light intensity, which are among the best values reported to date, along with the simplicity of fabrication, give this readily-available organic system great potential for use in plastic optoelectronic devices.

引用

页码：738 / 745

页数：8

共 45 条

[1] Carbon Nanotubes as Injection Electrodes for Organic Thin Film Transistors [J].