n
          -type organic field effect transistors from perylene bisimide block copolymers and homopolymers

Hüttner, Sven; Sommer, Michael; Thelakkat, Mukundan

doi:10.1063/1.2885712

Cited by 105 publications

(105 citation statements)

References 25 publications

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“…[ 10 ] In comparison, typical electron FET mobilities for electron-accepting polymers used in all-polymer photovoltaic devices are around 10 − 4 -10 − 2 cm 2 V − 1 s − 1 [11][12][13] compared to typical hole mobilities of 10 − 2 -10 − 1 cm 2 V − 1 s − 1 for electron-donating polymers. [ 14 , 15 ] P(NDI2OD-T2) is representative of a new generation of high-mobility polymers [16][17][18][19] that have been developed primarily for application in FETs that have to date seen little application in polymer photovoltaic devices.…”

Section: Introductionmentioning

confidence: 99%

Polymer Blend Solar Cells Based on a High‐Mobility Naphthalenediimide‐Based Polymer Acceptor: Device Physics, Photophysics and Morphology

Moore¹,

Albert‐Seifried²,

Rao³

et al. 2011

Advanced Energy Materials

210

186

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A high electron mobility polymer, poly{[N,N’‐bis(2‐octyldodecyl)‐naphthalene‐1,4,5,8‐bis(dicarboximide)‐2,6‐diyl]‐alt‐5,5’‐(2,2’‐bithiophene) (P(NDI2OD‐T2)) is investigated for use as an electron acceptor in all‐polymer blends. Despite the high bulk electron mobility, near‐infrared absorption band and compatible energy levels, bulk heterojunction devices fabricated with poly(3‐hexylthiophene) (P3HT) as the electron donor exhibit power conversion efficiencies of only 0.2%. In order to understand this disappointing photovoltaic performance, systematic investigations of the photophysics, device physics and morphology of this system are performed. Ultra‐fast transient absorption spectroscopy reveals a two‐stage decay process with an initial rapid loss of photoinduced polarons, followed by a second slower decay. This second slower decay is similar to what is observed for efficient P3HT:PCBM ([6,6]‐phenyl C61‐butyric acid methyl ester) blends, however the initial fast decay that is absent in P3HT:PCBM blends suggests rapid, geminate recombination of charge pairs shortly after charge transfer. X‐ray microscopy reveals coarse phase separation of P3HT:P(NDI2OD‐T2) blends with domains of size 0.2 to 1 micrometer. P3HT photoluminescence, however, is still found to be efficiently quenched indicating intermixing within these mesoscale domains. This hierarchy of phase separation is consistent with the transient absorption, whereby localized confinement of charges on isolated chains in the matrix of the other polymer hinders the separation of interfacial electron‐hole pairs. These results indicate that local, interfacial processes are the key factor determining the overall efficiency of this system and highlight the need for improved morphological control in order for the potential benefit of high‐mobility electron accepting polymers to be realized.

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Section: Introductionmentioning

confidence: 99%

Polymer Blend Solar Cells Based on a High‐Mobility Naphthalenediimide‐Based Polymer Acceptor: Device Physics, Photophysics and Morphology

Moore¹,

Albert‐Seifried²,

Rao³

et al. 2011

Advanced Energy Materials

210

186

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“…Recently, Hüttner et al [75] synthesized a homopolymer and a diblock copolymer containing perylene bisimide as pendant groups as solutionprocessable polymers for OTFTs. Their polymer OTFTs showed electron mobilities up to 1.2 Â 10 À3 cm 2 V À1 s À1 and low threshold voltages 4-7 V. More recently, Chen et al [76] reported two solution-processable n-channel copolymers, P(NDI2OD-T2) and…”

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confidence: 99%

Recent Progress in n‐Channel Organic Thin‐Film Transistors

2010

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Particular attention has been focused on n-channel organic thin-film transistors (OTFTs) during the last few years, and the potentially cost-effective circuitry-based applications in flexible electronics, such as flexible radiofrequency identity tags, smart labels, and simple displays, will benefit from this fast development. This article reviews recent progress in performance and molecular design of n-channel semiconductors in the past five years, and limitations and practicable solutions for n-channel OTFTs are dealt with from the viewpoint of OTFT constitution and geometry, molecular design, and thin-film growth conditions. Strategy methodology is especially highlighted with an aim to investigate basic issues in this field.

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“…[ 16 ] Several π-conjugated polymers have been specifi cally designed to be n-type, however, in OFETs the electron mobilities ( μ FET ) are in the range of 0.001-0.1 cm 2 /Vs, typically in vacuum conditions. [17][18][19][20] Recently, a novel electron-transporting polymer based on a naphthalene diimide core (Polyera ActivInk N2200) exhibited μ FET values of up to 0.85 cm 2 /Vs in ambient conditions. [ 21 ] In addition to the high μ FET , the location of the LUMO at ∼4 eV and an optical bandgap of 1.45 eV [ 21 ] make N2200 a promising candidate for other electronic devices.…”

mentioning

confidence: 99%

Bulk Electron Transport and Charge Injection in a High Mobility n‐Type Semiconducting Polymer

et al. 2010

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n -type organic field effect transistors from perylene bisimide block copolymers and homopolymers

Cited by 105 publications

References 25 publications

Polymer Blend Solar Cells Based on a High‐Mobility Naphthalenediimide‐Based Polymer Acceptor: Device Physics, Photophysics and Morphology

Polymer Blend Solar Cells Based on a High‐Mobility Naphthalenediimide‐Based Polymer Acceptor: Device Physics, Photophysics and Morphology

Recent Progress in n‐Channel Organic Thin‐Film Transistors

Bulk Electron Transport and Charge Injection in a High Mobility n‐Type Semiconducting Polymer

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