Charge recombination in distributed heterostructures of semiconductor discotic and polymeric materials.

被引：19

作者：

Clark, Jenny ^{[1
]}

Archer, Robert ^{[2
]}

Redding, Tim ^{[3
]}

Foden, Clare ^{[2
]}

Tant, Julien ^{[4
]}

Geerts, Yves ^{[4
]}

Friend, Richard H. ^{[3
]}

Silva, Carlos ^{[5
]}

机构：

[1] Politecn Milan, Dipartimento Fis, I-20133 Milan, Italy

[2] Madingley Rise, Cambridge Display Technol, Cambridge CB3 0TX, England

[3] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[4] Univ Libre Bruxelles, Lab Chim Polymeres, B-1050 Brussels, Belgium

[5] Univ Montreal, Dept Phys & Regrp Quebecois Mat Pointe, Montreal, PQ H3C 3J7, Canada

来源：

JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 12期

基金：

英国工程与自然科学研究理事会; 加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1063/1.2938082

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Control of microstructure and energetics at heterojunctions in organic semiconductors is central to achieve high light-emitting or photovoltaic device efficiency. We report the observation of an emissive exciplex formed between an electron-accepting discotic material (hexaazatrinaphthylene or HATNA-SC12) and a hole accepting conjugated polymer {poly[9,9- dioctylfluorene-co-N-(4-butylphenyl)diphenylamine] or TFB}. In contrast to polymer-polymer systems, we find here that the exciplex is strongly localized at the interface, acting as an energy bottleneck with inefficient transfer to bulk exciton states and with low yield of charge separation. (C) 2008 American Institute of Physics.

引用

页数：6

共 38 条

[21] High red, green, and blue color purity electroluminescence from MEH-PPV and polyalkyfluorenes-based bright white polymer light emitting displays
Lee, Rong-Ho
Lin, Kuo-Tung
Huang, Chen-Yang
[J]. JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2007, 45 (03) : 330 - 341
[22] High charge-carrier mobility in π-deficient discotic mesogens:: Design and structure-property relationship
Lehmann, M
Kestemont, G
Aspe, RG
Buess-Herman, C
Koch, MHJ
Debije, MG
Piris, J
de Haas, MP
Warman, JM
Watson, MD
Lemaur, V
Cornil, J
Geerts, YH
Gearba, R
Ivanov, DA
[J]. CHEMISTRY-A EUROPEAN JOURNAL, 2005, 11 (11) : 3349 - 3362
[23] Strong red emission in heterojunctions of conjugated polymer blends
Li, ZL
Meng, HF
Horng, SF
Hsu, CS
Chen, LC
Chang, SM
[J]. APPLIED PHYSICS LETTERS, 2004, 84 (24) : 4944 - 4946
[24] Conjugated polymer blends: linking film morphology to performance of light emitting diodes and photodiodes
Moons, E
[J]. JOURNAL OF PHYSICS-CONDENSED MATTER, 2002, 14 (47) : 12235 - 12260
[25] Morteani A. C., 2006, ORGANIC LIGHT EMITTI
[26] Electric field-induced transition from heterojunction to bulk charge recombination in bilayer polymer light-emitting diodes
Morteani, AC
Ho, PKH
Friend, RH
Silva, C
[J]. APPLIED PHYSICS LETTERS, 2005, 86 (16) : 1 - 3
[27] Exciton regeneration at polymeric semiconductor heterojunctions
Morteani, AC
Sreearunothai, P
Herz, LM
Friend, RH
Silva, C
[J]. PHYSICAL REVIEW LETTERS, 2004, 92 (24) : 247402 - 1
[28] Barrier-free electron-hole capture in polymer blend heterojunction light-emitting diodes
Morteani, AC
Dhoot, AS
Kim, JS
Silva, C
Greenham, NC
Murphy, C
Moons, E
Ciná, S
Burroughes, JH
Friend, RH
[J]. ADVANCED MATERIALS, 2003, 15 (20) : 1708 - +
[29] Exciplex dynamics in a blend of π-conjugated polymers with electron donating and accepting properties:: MDMO-PPV and PCNEPV -: art. no. 045213
Offermans, T
van Hal, PA
Meskers, SCJ
Koetse, MM
Janssen, RAJ
[J]. PHYSICAL REVIEW B, 2005, 72 (04)
[30] EFFICIENT BLUE LUMINESCENCE OF A CONJUGATED POLYMER EXCIPLEX
OSAHENI, JA
JENEKHE, SA
[J]. MACROMOLECULES, 1994, 27 (03) : 739 - 742

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