Solution-based 5,6,11,12-tetrachlorotetracene crystal growth for high-performance organic thin film transistors

He, Zhengran; Lopez, Nereo; Chi, X.; Li, Dawen

doi:10.1016/j.orgel.2015.03.050

Cited by 44 publications

(31 citation statements)

References 22 publications

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“…Various efforts have been made to address these issues in different semiconducting material systems. [10][11][12] For example, Lee et al demonstrated the growth of 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS pentacene) on a slightly tilted substrate, resulting in an array of ribbon-shaped TIPS pentacene crystals well-aligned in the tilted direction of the substrate. 13 More recently, Li et al employed a "droplet-pinned crystallization" method to control the crystal growth of C 60 , which successfully leads to well-aligned C 60 single crystals.…”

Section: Introductionmentioning

confidence: 99%

Solution-grown small-molecule organic semiconductor with enhanced crystal alignment and areal coverage for organic thin film transistors

Chen

et al. 2015

AIP Advances

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Drop casting of small-molecule organic semiconductors typically forms crystals with random orientation and poor areal coverage, which leads to significant performance variations of organic thin-film transistors (OTFTs). In this study, we utilize the controlled evaporative self-assembly (CESA) method combined with binary solvent system to control the crystal growth. A small-molecule organic semiconductor,2,5-Di-(2-ethylhexyl)-3,6-bis(5″-n-hexyl-2,2′,5′,2″]terthiophen-5-yl)-pyrrolo[3,4-c]pyrrole-1,4-dione (SMDPPEH), is used as an example to demonstrate the effectiveness of our approach. By optimizing the double solvent ratios, well-aligned SMDPPEH crystals with significantly improved areal coverage were achieved. As a result, the SMDPPEH based OTFTs exhibit a mobility of 1.6 × 10−2 cm2/V s, which is the highest mobility from SMDPPEH ever reported.

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Section: Introductionmentioning

confidence: 99%

Solution-grown small-molecule organic semiconductor with enhanced crystal alignment and areal coverage for organic thin film transistors

Chen

et al. 2015

AIP Advances

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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%

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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“…Despite these advantages, their implementation in organic electronics devices still has many restrictions, which can be attributed to problems including crystal misorientation, morphological nonuniformity and low charge-carrier mobility [12,13]. These issues would further cause problems such as substrate poor coverage and inferior device performance consistency [14][15][16][17]. As a result, various hybrid material systems that incorporate both organic semiconductors and additive materials have been successfully demonstrated, which can take advantages of the merits from both components and contribute to the enhanced performance of organic electronics devices [18][19][20].…”

Section: Introductionsmentioning

confidence: 99%

“…The measured mobilities in SMDPPEH ranged from 5.7×10 −5 cm 2 V −1 s −1 to 5.4×10 −4 cm 2 V −1 s −1 , which indicated variations of one order of magnitude. He et al reported that when a p-type semiconductor 5,6,11,12-tetrachlorotetracene (molecular structure shown in figure 1(d)) was drop casted in a single solvent of chloroform, it formed misoriented needles without neither long-range alignment nor continuous coverage on substrate (figure 1(e)) [15]. The 5,6,11,12tetrachlorotetracene based OTFTs exhibited mobilities that largely ranged from 0.006 cm 2 V −1 s −1 to 0.39 cm 2 V −1 s −1 , indicating mobility variations of almost three orders of magnitude.…”

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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Solution-based 5,6,11,12-tetrachlorotetracene crystal growth for high-performance organic thin film transistors

Cited by 44 publications

References 22 publications

Solution-grown small-molecule organic semiconductor with enhanced crystal alignment and areal coverage for organic thin film transistors

Solution-grown small-molecule organic semiconductor with enhanced crystal alignment and areal coverage for organic thin film transistors

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

Nanoparticles for organic electronics applications

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