Air-stable solution-processed <i>n</i>-channel organic thin film transistors with polymer-enhanced morphology

He, Zhengran; Shaik, Shoieb; Bi, Sheng; Chen, Jihua; Li, Dawen

doi:10.1063/1.4919677

Cited by 40 publications

(19 citation statements)

References 24 publications

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“…From the view of molecular design, PTCDI-C 13 H 27 is one of perylene derivatives that is favorable for the good stability in n -type organic transistors 20,26 . At the same time, PMMA is used as the dielectric of the transistor because its hydrophobic nature has been extensively shown to be favorable for good device stability 27,28 . Based on such a stable n -type organic transistor, we show the potential of PTCDI-C 13 H 27 in fabrication of n -type conformal OPT array, and the potential application of the devices for future wearable and portable electronics and optoelectronics.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Air-Stable n-Type Organic Phototransistor Array for Conformal Optoelectronics

Liu

Wang

Tang

et al. 2018

Sci Rep

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Development of conformal n-channel organic phototransistor (OPT) array is urgent for future applications of organic complementary circuits in portable and wearable electronics and optoelectronics. In this work, the ultrathin conformal OPT array based on air-stable n-type PTCDI-C13H27 was fabricated. The OPT array shows excellent electrical and photoelectrical performance, good device uniformity, and remains stable in electron mobility by 83% after 90 days compared to the initial values. Eventhough mobility, on-state current, off-state current, and photocurrent of PTCDI-C13H27 thin film phototransistor show slight decrease with the decreased bending radius, the device still remains the stable photosensitivity as high as 104 when the device is freely adhered on the 2D surfaces and 3D hemispherical sphere, which is in a class with the highest photosensitivity for perylene diimide derivatives. These results present the promising application potential of our conformable air-stable n-type PTCDI-C13H27 OPTs as the photodetection system of curved artificial compound eyes in wearable and portable electronics and optoelectronics.

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Section: Introductionmentioning

confidence: 99%

Ultrathin Air-Stable n-Type Organic Phototransistor Array for Conformal Optoelectronics

Liu

Wang

Tang

et al. 2018

Sci Rep

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“…boundaries of the crystals [49][50][51][52], and thus, less populated grain boundaries as a result of enlarged grain width can essentially benefit the electrical performance of the smallmolecular semiconductor based transistor. In addition, the crystal coverage was calculated based on the percentage of the substrate that was covered with the semiconductor crystalline film.…”

Section: Resultsmentioning

confidence: 99%

“…Evidently, the addition of the PFS semicrystalline polymer results in a more than 3-fold increase of the grain width of TIPS pentacene crystals. It is well known that the defects and charge trap centers can be mostly found at the grain boundaries of the crystals [ 49 , 50 , 51 , 52 ], and thus, less populated grain boundaries as a result of enlarged grain width can essentially benefit the electrical performance of the small-molecular semiconductor based transistor.…”

Section: Resultsmentioning

confidence: 99%

Polyferrocenylsilane Semicrystalline Polymer Additive for Solution-Processed p-Channel Organic Thin Film Transistors

Zhang

Asare‐Yeboah

et al. 2021

Polymers

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In this study, we demonstrated for the first time that a metal-containing semicrystalline polymer was used as an additive to mediate the thin film morphology of solution-grown, small-molecule organic semiconductors. By mixing polyferrocenylsilane (PFS) with an extensively-studied organic semiconductor 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS pentacene), PFS as a semicrystalline polymer independently forms nucleation and crystallization while simultaneously ameliorating diffusivity of the blend system and tuning the surface energies as a result of its partially amorphous property. We discovered that the resultant blend film exhibited a 6-fold reduction in crystal misorientation angle and a 3-fold enlargement in average grain width. Enhanced crystal orientation considerably reduces mobility variation, while minimized defects and trap centers located at grain boundaries lessen the adverse impact on the charge transport. Consequently, bottom-gate, top-contact organic thin film transistors (OTFTs) based on the TIPS pentacene/PFS mixture yielded a 40% increase in performance consistency (represented by the ratio of average mobility to the standard deviation of mobility). The PFS semicrystalline polymer-controlled crystallization can be used to regulate the thin film morphology of other high-performance organic semiconductors and shed light on applications in organic electronic devices.

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“…The research of solution-processed organic semiconductors has achieved unprecedented progress in recent years [1][2][3][4][5][6][7]. Specially, they have been demonstrated with properties that would greatly benefit application in organic thin-film transistors (OTFTs), which include improved charge-carrier mobilities and expanded solubility in organic solvents [8][9][10][11].…”

Section: Introductionsmentioning

confidence: 99%

Nanoparticles for organic electronics applications

Zhang

2020

Mater. Res. Express

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Recently, the research in solution-based, small-molecule organic semiconductors has achieved great progress, although their application in organic electronics devices is still restricted by a variety of issues, including crystal misorientation, morphological nonuniformity and low charge-carrier mobility. In order to overcome these issues, hybrid material systems that incorporate both organic semiconductors and additives have been successfully demonstrated to control crystal growth and charge transport of the organic semiconductors. In this work, we first review the recent advances in the charge-carrier mobility of the organic semiconductors, followed by a comparison of the different additives that have been reportedly blended with the semiconductors, including polymeric additives, small-molecule additives and nanoparticle based additives. Then we will review the important nanoparticles employed as additives to blend with solution-based, organic semiconductors, which effectively improved the semiconductor crystallization, enhanced film uniformity and increased charge transport. By discussing specific examples of various well-known organic semiconductors such as 6, 13-bis (triisopropylsilylethynyl) pentacene (TIPS pentacene), we demonstrate the essential relationship among the crystal growth, semiconductor morphology, dielectric properties, and chargecarrier mobilities. This work sheds light on the implementation of nanoparticle additives in highperformance organic electronics device application. the application of the organic semiconductor in thin-film transistor and other electronics device fabrication. Throughout the discussion of these specific examples that mainly involve small-molecule organic semiconductors, we showcase that this work can be used to control the crystallization and electrical performance of other newly-discovered, high-performance, semiconducting materials. Advances in organic electronicsIn this section, we will review the various advances in charge-carrier mobilities and device application that have been recently achieved in the field of organic electronics. The following discussion will be mainly focused on various solution-processed, small-molecule, organic semiconductors.The mobilities in solution-processed, small-molecule, organic semiconductors have been reported to be compared to or even far surpass the mobility of amorphous silicon. For example, Asare-Yeboah et al developed a temperature-based method which exposed the substrate to a gradient temperature and induced a solubility difference of a p-type small-molecule semiconductor 6, 13-bis (triisopropylsilylethynyl) pentacene (TIPS pentacene) [18]. TIPS pentacene crystals grew from the lower temperature side of the substrate towards the higher temperature side, forming well-aligned ribbons across the whole substrate. A mobility of up to 0.5 cm 2 V −1 s −1 has been reported from the TIPS pentacene OTFTs based on an ITO/PET flexible substrate by using the temperature-based alignment technique. Wade et al demonstrated a zone casting metho...

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Air-stable solution-processed n-channel organic thin film transistors with polymer-enhanced morphology

Cited by 40 publications

References 24 publications

Ultrathin Air-Stable n-Type Organic Phototransistor Array for Conformal Optoelectronics

Ultrathin Air-Stable n-Type Organic Phototransistor Array for Conformal Optoelectronics

Polyferrocenylsilane Semicrystalline Polymer Additive for Solution-Processed p-Channel Organic Thin Film Transistors

Nanoparticles for organic electronics applications

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