Highly Efficient Contact Doping for High-Performance Organic UV-Sensitive Phototransistors

Li, Bin; Zhang, Yihan; Liu, Yang; Ren, Yiwen; Zhu, Xiaoting; Sun, Lingjie; Zhang, Xiaotao; Yang, Fangxu; Li, Rongjin; Hu, Wenping

doi:10.3390/cryst12050651

Cited by 6 publications

(3 citation statements)

References 59 publications

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“…38,39 Thus, this OSC is a promising OSC to detect UV light. 40,41 Thin films of Ph-BTBT-10 and blends of this material with polystyrene (PS), poly(pentafluorostyrene) (PFS) and poly(methyl methacrylate) (PMMA) were deposited using the bar-assisted meniscus shearing (BAMS) technique on Si/SiO 2 substrates, employing the same deposition conditions as previously reported (see the Experimental section 10,13,42,43 ). The use of binding polymers typically gives rise to a vertical phase separation, where, commonly, the OSC crystallises on top of a layer of the binding polymer.…”

Section: Resultsmentioning

confidence: 99%

Binder polymer influence on the electrical and UV response of organic field-effect transistors

Tamayo

Quintana

et al. 2023

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 99%

Binder polymer influence on the electrical and UV response of organic field-effect transistors

Tamayo

Quintana

et al. 2023

J. Mater. Chem. C

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“…The capacitance of the double-layer dielectric layer was measured to be 7.35 nF cm −2 (figure S8, supplementary materials). The electrodes of the S and D were Ag, and a 2 nm thick F 4 -TCNQ layer was inserted into the interface between the C 8 -BTBT crystals and S/D electrodes, which could reduce the contact resistance [29,30]. The effective channel L and W are 50 and 50 µm, respectively.…”

Section: Resultsmentioning

confidence: 99%

Patterning of organic semiconductor crystal arrays via microchannel-assisted inkjet printing for organic field-effect transistors

et al. 2022

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Inkjet printing provides a low-cost way for the large-area construction of organic semiconductor patterns in integrated organic electronics. However, because of a lack of control over the wetting and dewetting dynamics of organic inks, inkjet-printed organic semiconductor crystals (OSCCs) are frequently plagued by the “coffee ring” effect and uncontrollable growth processes, leading to uneven crystal morphology and disordered orientation. Here, we report a universal microchannel-assisted inkjet printing (MA-IJP) method for the patterning of OSCC arrays with ordered crystallographic orientation. The micro-sized channel template not only provides a unidirectional capillary force to guide the wetting process of organic inks, but also confines the evaporation-induced dewetting, enabling the long-range ordered growth of OSCCs. The resulting 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT) patterned crystals present one-dimensional structures with a pure (010) crystallographic orientation. The 7 × 7 discrete organic field-effect transistor (OFET) array made from the patterned C8-BTBT crystals exhibits a high average mobility up to 3.23 cm2 V-1 s-1 with a maximum mobility of 5.36 cm2 V-1 s-1. Given the good generality of the patterning process and the high quality of the obtained OSCC crystal array, it is anticipated that our MA-IJP approach will constitute a major step toward integrated organic electronic and optoelectronic devices.

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“…Strategies for reducing R C in OFETs often focus on the minimization of R inter , including the interfacial treatment to decrease the injection barrier, and local chemical doping (such as MoO 3 and F 4 TCNQ) to facilitate carrier injection. , Regarding the minimization of R bulk , a straightforward approach is to reduce the thickness of the active layer . In particular, Chan et al utilized an organic crystalline monolayer and nondestructive contacts to realize a very small R C .…”

Section: Introductionmentioning

confidence: 99%

Reducing Contact Resistance in Organic Field-Effect Transistors: A Comprehensive Comparison between 2D and Microrod Single Crystals

Zong

Wang

Chen

et al. 2023

ACS Appl. Mater. Interfaces

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A comprehensive comparison of organic single crystals based on a single material but with different dimensions provides a unique approach to probe their carrier injection mechanism. In this report, both two-dimensional (2D) and microrod single crystals with the same crystalline structure of an identical thiopyran derivative, 7,14-dioctylnaphtho[2,1-f:6,5-f′]bis(cyclopentane-[b]thiopyran) (C 8 -SS), are grown on a glycerol surface with the space-confined method. Organic field-effect transistors (OFETs) based on the 2D C 8 -SS single crystal exhibit superior performance compared with those based on the microrod single crystal, particularly in their contact resistance (R C ). It is demonstrated that the resistance of the crystal bulk in the contact region plays a key role in R C of the OFETs. Thus, among the 30 devices tested, the microrod OFETs typically appear contact-limited, whereas the 2D OFETs possess significantly reduced R C arising from the tiny thickness of the 2D single crystal. The 2D OFETs show high operational stability and high channel mobility up to 5.7 cm 2 /V•s. The elucidation of the contact behavior highlights the merits and great potential of 2D molecular single crystals in organic electronics.

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Highly Efficient Contact Doping for High-Performance Organic UV-Sensitive Phototransistors

Cited by 6 publications

References 59 publications

Binder polymer influence on the electrical and UV response of organic field-effect transistors

Binder polymer influence on the electrical and UV response of organic field-effect transistors

Patterning of organic semiconductor crystal arrays via microchannel-assisted inkjet printing for organic field-effect transistors

Reducing Contact Resistance in Organic Field-Effect Transistors: A Comprehensive Comparison between 2D and Microrod Single Crystals

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