High Photoconductive Responsivity in Solution-Processed Polycrystalline Organic Composite Films

被引：21

作者：

Hernandez-Sosa, Gerardo ^{[1
]}

Coates, Nelson. E. ^{[1
]}

Valouch, Sebastian ^{[1
]}

Moses, Daniel ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Ctr Polymers & Organ Solids, Santa Barbara, CA 93106 USA

来源：

ADVANCED FUNCTIONAL MATERIALS | 2011年 / 21卷 / 05期

关键词：

PERFORMANCE; PENTACENE;

D O I：

10.1002/adfm.201002518

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We demonstrate a novel approach for enhancing photoconductive responsivity (R) using a solution-based organic semiconductor composite that yields R approaching 25 AW(-1), which is two to three orders of magnitude higher than the R in films comprising a single molecular component. We present extensive studies of photoconductivity, photoluminescence, and crystalline structural order that elucidate the mechanisms underlying this high photoconductive responsivity. The high R is found to arise from high photoconductive gain (82) due to a long mobile hole lifetime stemming from a prolonged occupation of electrons in deep traps generated at interfacial regions between the molecular crystallites.

引用

页码：927 / 931

页数：5

共 23 条

[1]

BADGER GM, 1950, SPECTROCHIM ACTA, V4, P280

[2] The lowest triplet state of 9,10 diphenylanthracene [J].

Brinen, J. S. ;

Koren, J. G. .

CHEMICAL PHYSICS LETTERS, 1968, 2 (08) :671-672

[3] Bulk photoconductive gain in poly(phenylene vinylene) based diodes [J].

Campbell, I. H. ;

Crone, B. K. .

JOURNAL OF APPLIED PHYSICS, 2007, 101 (02)

[4] A near infrared organic photodiode with gain at low bias voltage [J].

Campbell, I. H. ;

Crone, B. K. .

APPLIED PHYSICS LETTERS, 2009, 95 (26)

[5] Efficient bulk photogeneration of charge carriers and photoconductivity gain in arylamino-PPV polymer sandwich cells [J].

Däubler, TK ;

Neher, D ;

Rost, H ;

Hörhold, HH .

PHYSICAL REVIEW B, 1999, 59 (03) :1964-1972

[6] Field-effect transistors on tetracene single crystals [J].

de Boer, RWI ;

Klapwijk, TM ;

Morpurgo, AF .

APPLIED PHYSICS LETTERS, 2003, 83 (21) :4345-4347

[7] An improved experimental determination of external photoluminescence quantum efficiency [J].

deMello, JC ;

Wittmann, HF ;

Friend, RH .

ADVANCED MATERIALS, 1997, 9 (03) :230-&

[8]

DONATI S, 2000, PHOTODETECTORS PRENT

[9]

FORSTER T, 1959, EXCITATION TRANSFERI

[10] Bulk photoconductive gain in pentacene thin films [J].

Gao, J. ;

Hegmann, F. A. .

APPLIED PHYSICS LETTERS, 2008, 93 (22)

← 1 2 3 →