Effects of the F4TCNQ-Doped Pentacene Interlayers on Performance Improvement of Top-Contact Pentacene-Based Organic Thin-Film Transistors

Fan, Chih‐Peng; Lin, Wei–Chun; Chang, Hao‐Chin; Lin, Yung‐Chih; Huang, Bohr–Ran

doi:10.3390/ma9010046

Cited by 12 publications

(5 citation statements)

References 22 publications

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“…In single crystals obtained by the physical vapor transport (PVT) method, µ h reaches values of 2.5-6.2 cm 2 •V −1 •s −1 [3][4][5]. Pentacene confidently takes its rightful place in organic electronics and has not lost its popularity among research groups as a convenient material for developing new research methods [1], as a model substance [6], and also as the main or doping component in the development of optoelectronic devices [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Growth and Characterization of Centimeter-Scale Pentacene Crystals for Optoelectronic Devices

et al. 2023

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In this work, we present results on the growth of centimeter-scale pentacene crystals using the physical vapor transport method in a dual-temperature zone horizontal furnace. It was established that intensive crystal growth processes occurred in transition regions with sudden temperature changes, while crystal growth was practically not observed in regions with slightly varying temperatures. During crystal growth, co-precipitating golden needle-like crystals reaching lengths of more than 10 mm were obtained. Using the method of single-crystal X-ray diffraction at 85 and 293 K for dark-blue lamellar pentacene crystals, the crystal structure was refined in a triclinic system with sp.gr. P1¯. It was established that the golden needle crystals consisted of molecules of the pentacene derivative—5,14-pentacenedione, the crystal structure of which was solved for the first time in a rhombic system with sp.gr. P212121. The absorption and luminescence spectra of pentacene and 5,14-pentacenedione in toluene solutions were obtained and analyzed. The electrical properties of the prepared pentacene thin films and single crystals grown under physical vapor transport conditions were evaluated by fabricating and characterizing field-effect transistors (FETs). It was shown that the presence of impurities in the commercial pentacene material had a significant effect on the morphological quality of thin polycrystalline films and noticeably reduced the hole mobility.

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Section: Introductionmentioning

confidence: 99%

Growth and Characterization of Centimeter-Scale Pentacene Crystals for Optoelectronic Devices

et al. 2023

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“…Numerous practical advances have been achieved in the study of the properties of organic compounds and devices [3][4][5]. In particular, as a vital organic semiconductor material, pentacene is extensively used in organic thin-film transistors [6], organic field-effect transistors [7], organic solar cells [8], and other devices. To study the phenomenon of co-crystallization and doping effects, and obtain materials with superior performance, pentacene is often added to high-purity organic functional materials as adopant to prepare doped crystals [9,10].…”

Section: Introductionmentioning

confidence: 99%

Growth of Pentacene-Doped p-Terphenyl Crystals Using SSVBT and Doping Effects in p-Terphenyl Molecular Crystals

Chen

et al. 2022

Crystals

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High-quality pentacene-doped p-terphenyl bulk crystals were grown by the selective self-seeding vertical Bridgman technique (SSVBT). The lattice structure and crystal properties of the samples of different doping concentrations and their relations with p-terphenyl single crystals were tested and analyzed. The doping effects of pentacene doping at different concentrations in p-terphenyl molecular crystals are discussed. The powder X-ray diffraction, FTIR, and 1H NMR studies show that no additional peaks (except for p-terphenyl) are observed in the spectra of two doped crystals. The results indicate that guest molecules appear as defects in the form of irregularly oriented molecules which do not significantly change the crystal structures. As the doping concentration increases, the average crystallite size decreases, and the crystallinity declines. The ultraviolet–visible absorption and fluorescence spectra show that with added pentacene molecules, the characteristic peak intensities decrease in the spectra owing to the p-terphenyl molecular transition. Meanwhile, characteristic peaks appear due to the pentacene molecular transition. Moreover, with the increase of doping concentration, the intensities of characteristic peaks of host molecules decrease continuously, and those of guest molecules increase accordingly.

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“…In solar cell applications, efficient generation of electron-hole pair (exciton) is required to create a thin functional layer having a large bandgap with sufficient energy. Such bandgap can be achieved in a dye-doped polymer interface, such as dye-doped pentacene [33][34][35]. The latter has enhanced electronic coupling between the dye electrolyte and the semiconducting electrode, providing a broad spectrum of absorption.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Absorption Edge of Anchusa-Italica-Doped Pentacene towards Optoelectronic Applications

Alaridhee

Malk

Hussein

et al. 2020

MSF

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The dye-doped polymer is commonly used in the field of optoelectronics, given its effectiveness in optimising the device’s performance. This study is devoted to the synthesis and characterisation of Anchusa-Italica-doped Pentacene thin-film. Scanning electronic microscopy structural analysis, Fourier transform spectroscopy, and UV-visible transmittance spectra with a range of 300-900 nm were also carried out. The fundamental optical properties such as the absorption coefficient, optical energy gap, absorption and refractive indices were calculated based on the methods already used in the literature as Tauc’s relationship. The morphology of the samples indicated that dye structure was affected in the doped pentacene. The Fourier transform infrared technique (FT-IR) resulting spectrum of the doped samples also showed a significant absorption peak corresponding to C-H as an index of impurities. The calculated band-gap energy of the impurity sample was reduced and was the lowest compared to both the pure dye and polymer samples. The optical absorption and transmittance spectra revealed that it was positioned in the desirable ranges for optoelectronic applications. An anomaly in the absorption index was also observed through excitation of the resonance mode with transparent indication. This effect was deduced from the calculation of the refractive index. The results presented in this paper significantly contribute to the developments in the field of optoelectronic devices based on dye/polymer organic materials.

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Effects of the F4TCNQ-Doped Pentacene Interlayers on Performance Improvement of Top-Contact Pentacene-Based Organic Thin-Film Transistors

Cited by 12 publications

References 22 publications

Growth and Characterization of Centimeter-Scale Pentacene Crystals for Optoelectronic Devices

Growth and Characterization of Centimeter-Scale Pentacene Crystals for Optoelectronic Devices

Growth of Pentacene-Doped p-Terphenyl Crystals Using SSVBT and Doping Effects in p-Terphenyl Molecular Crystals

Enhanced Absorption Edge of Anchusa-Italica-Doped Pentacene towards Optoelectronic Applications

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