Pentacene TFT driven AM OLED displays

Zhou, Lipu; Park, Sungkyu; Bai, Bo; Sun, Jie; Wu, Sheng-Chu; Jackson, Thomas N.; Nelson, Shelby F.; Freeman, D.; Hong, Yongtaek

doi:10.1109/led.2005.853654

Cited by 96 publications

(20 citation statements)

References 9 publications

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“…e) Threshold voltage consistency and f) the corresponding field-effect mobility consistency of the reported representative OFET-OLED active circuit. [41][42][43][44][45][46] configuration was chosen to promote the stability of the PTFTs devices. To better meet the requirement of active circuits, interfacial optimization was conducted.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Realizing Diketopyrrolopyrrole Polymer‐Based Uniform Large‐Area Transistors for Active Circuit via Protonic Acid Mediated Molecular Self‐Assembly

Liu

Zhao

Huang

et al. 2021

Adv Elect Materials

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design, synthesis technology, and device engineering. [5,6] Therefore, PTFTs open a previously inaccessible application space in large-area, lightweight, flexible, and low-cost optoelectronics, such as logic circuits, [7,8] artificial synapses, [9] sensors, [10] light-emitting transistors, [11] and flexible display drive circuits. [12] Accordingly, display drive circuits supported by PTFTs will bring display electronics more wearable, lightweight, and even stretchable in the future and accelerate the 3D freeform and conformal display. [13,14] However, PTFTs usually show up obvious device performance deviation induced by the film anisotropy and defect during the scalable fabrication process. [15,16] This often leads to problems like circuit leakage, high power consumption, and even short circuit. Therefore, active-matrix organic lightemitting diode (AMOLED) screens based on PSCs are rarely reported. It has become an urgent problem to improve the performance uniformity of PTFT devices while ensuring device performance.The soluble property and crystallization of polymer semiconductors in the nonchlorine solvent (NClS) are important factors affecting the homogeneity of large-area films. Rigid planar framework strategies and high molecular weight strategies often lead to crystallization-dependent high mobility. However, this usually causes the problem of poor solubility. [17] Consequently, most of the "record-high mobility" performance of PSCs was at the cost of poor NClS processing ability and bad performance consistency. [18] Polar side-chain strategy [19] and random copolymerization strategy [20] can effectively improve the solubility of polymer semiconductors. However, it usually leads to complicated synthetic steps, which are not conducive to batch stability. Different from the poor NClS processability of the semicrystalline polymers, short-range ordered interconnected near-amorphous polymers, such as indacenodithiophene-co-benzothiadiazole (IDT-BT), usually exhibited considerable solubility in many NClSs. [21] These polymer semiconductors have more potential in scalable NClS processed devices and the corresponding active circuits. [22,23] Considering the molecular weight-dependent solubility and mobility characteristics of this kind of material, [24] it is reasonable to control a modest molecular weight to balance mobility and solubility.The solution-handling characteristics of π-conjugated polymer semiconductors make them promising candidates for low-cost flexible electronics. Although homogeneous and stable nonchlorine solvent (NClS) processing is the only way that must be passed for future application, polymer semiconductors still meet the challenges of poor solubility and inhomogeneities in NClS. Here, the authors primp polymer molecules with protonic acid by multiple interactions, that is, proton exchange and hydrogen bond interaction, to achieve scale and model-constrained PDVT-10c assembly in NClS. As a result, a uniform near-amorphous PDVT-C10c film is developed for polymer thinfilm transistor (PTFT) arr...

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Section: Resultsmentioning

confidence: 99%

“…c,d)The corresponding threshold voltage distribution heat maps. e) Threshold voltage consistency and f) the corresponding field-effect mobility consistency of the reported representative OFET-OLED active circuit [41][42][43][44][45][46].…”

mentioning

confidence: 99%

Realizing Diketopyrrolopyrrole Polymer‐Based Uniform Large‐Area Transistors for Active Circuit via Protonic Acid Mediated Molecular Self‐Assembly

Liu

Zhao

Huang

et al. 2021

Adv Elect Materials

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“…Several AMOLED displays on glass or PEN have been demonstrated [19][20][21]. In this work we demonstrate a novel integration process that includes a hybrid Al 2 O 3 /parylene dielectric stack that results in an improved OTFT based on the pixel reliability [22,23].…”

Section: Introductionmentioning

confidence: 93%

A flexible organic active matrix circuit fabricated using novel organic thin film transistors and organic light-emitting diodes

Gutiérrez-Heredia¹,

González²,

Alshareef³

et al. 2010

Semicond. Sci. Technol.

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We present an active matrix circuit fabricated on plastic (polyethylene naphthalene, PEN) and glass substrates using organic thin film transistors and organic capacitors to control organic light-emitting diodes (OLEDs). The basic circuit is fabricated using two pentacene-based transistors and a capacitor using a novel aluminum oxide/parylene stack (Al 2 O 3 /parylene) as the dielectric for both the transistor and the capacitor. We report that our circuit can deliver up to 15 μA to each OLED pixel. To achieve 200 cd m −2 of brightness a 10 μA current is needed; therefore, our approach can initially deliver 1.5× the required current to drive a single pixel. In contrast to parylene-only devices, the Al 2 O 3 /parylene stack does not fail after stressing at a field of 1.7 MV cm −1 for >10 000 s, whereas 'parylene only' devices show breakdown at approximately 1000 s. Details of the integration scheme are presented.

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“…Potential uses include but are not limited to radio-frequency identification (RFID) tags, electronic paper, chemical sensors, and background circuitry to active matrix displays [5–8]. Although much work in the OTFT field has been aimed at increasing device performance by improving the semiconducting layer through tuning molecular design and/or processing of small-molecule/polymeric materials that it is comprised of, it has been demonstrated that modification of the gate dielectric can be equally influential [9–13].…”

Section: Introductionmentioning

confidence: 99%

Solid-state densification of spun-cast self-assembled monolayers for use in ultra-thin hybrid dielectrics

Hutchins

Acton

Weidner

et al. 2012

Applied Surface Science

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Ultra-thin self-assembled monolayer (SAM)-oxide hybrid dielectrics have gained significant interest for their application in low-voltage organic thin film transistors (OTFTs). A [8-(11-phenoxy-undecyloxy)-octyl]phosphonic acid (PhO-19-PA) SAM on ultrathin AlOx (2.5 nm) has been developed to significantly enhance the dielectric performance of inorganic oxides through reduction of leakage current while maintaining similar capacitance to the underlying oxide structure. Rapid processing of this SAM in ambient conditions is achieved by spin coating, however, as-cast monolayer density is not sufficient for dielectric applications. Thermal annealing of a bulk spun-cast PhO-19-PA molecular film is explored as a mechanism for SAM densification. SAM density, or surface coverage, and order are examined as a function of annealing temperature. These SAM characteristics are probed through atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and near edge X-ray absorption fine structure spectroscopy (NEXAFS). It is found that at temperatures sufficient to melt the as-cast bulk molecular film, SAM densification is achieved; leading to a rapid processing technique for high performance SAM-oxide hybrid dielectric systems utilizing a single wet processing step. To demonstrate low-voltage devices based on this hybrid dielectric (with leakage current density of 7.7×10−8 A cm−2 and capacitance density of 0.62 µF cm−2 at 3 V), pentacene thin-film transistors (OTFTs) are fabricated and yield sub 2 V operation and charge carrier mobilites of up to 1.1 cm2 V−1 s−1.

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Pentacene TFT driven AM OLED displays

Cited by 96 publications

References 9 publications

Realizing Diketopyrrolopyrrole Polymer‐Based Uniform Large‐Area Transistors for Active Circuit via Protonic Acid Mediated Molecular Self‐Assembly

Realizing Diketopyrrolopyrrole Polymer‐Based Uniform Large‐Area Transistors for Active Circuit via Protonic Acid Mediated Molecular Self‐Assembly

A flexible organic active matrix circuit fabricated using novel organic thin film transistors and organic light-emitting diodes

Solid-state densification of spun-cast self-assembled monolayers for use in ultra-thin hybrid dielectrics

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