Multifunctional organic field effect transistors constructed with photochromic molecules

Xu, Cheng; Zhang, Junji; Xu, Wei; Tian, He

doi:10.1039/d0qm00567c

Cited by 35 publications

(24 citation statements)

References 69 publications

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“…Photoswitchable (photochromic) molecules are the key building blocks for light-controllable elements of molecular electronics. , Over the past decade, much attention has been paid to the design of organic transistor devices with light-tunable electrical parameters. − Photoswitches suitable for molecular electronics should possess significant modulation of the electronic levels of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), respectively. The photochromic performance of diarylethene (DAE) features significant changes in the electronic structure along with only slight alterations in the molecular geometry .…”

Section: Introductionmentioning

confidence: 99%

Photocontrollable Modulation of Frontier Molecular Orbital Energy Levels of Cyclopentenone-Based Diarylethenes

et al. 2021

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Photoswitchable diarylethenes provide a unique opportunity to optically modulate frontier molecular orbital energy levels, thereby opening an avenue for the design of electronic devices such as photocontrollable organic field-effect transistors (OFETs). In the present work, the absolute position of the frontier orbital levels of nonsymmetrical diarylethenes based on a cyclopentenone bridge has been studied using cyclic voltammetry and density functional theory (DFT) calculations. It has been shown that varying heteroaromatic substituents make it possible to change the absolute positions of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) of both diarylethene photoisomers. The data obtained are used to refine the operation mechanism of the previously developed OFET devices, employing the cyclopentenone-derived diarylethenes at the dielectric/semiconductor interface.

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Section: Introductionmentioning

confidence: 99%

Photocontrollable Modulation of Frontier Molecular Orbital Energy Levels of Cyclopentenone-Based Diarylethenes

et al. 2021

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“…In following irradiation cycles, the increase in current and decay with 470 nm is nearly identical to the response under 365 nm light. This fast ON–OFF performance is maintained upon repeated cycling between 365 and 470 nm light (Figure a), a performance that is within the range of , or exceeds , other photochromism-based devices.…”

Section: Results and Discussionmentioning

confidence: 99%

“…However, both devices hold importance in the application of photochromic devices, with previous literature examples more useful as writing/erasing photomemory devices and the Azo-PIL device described here applicable as a light sensor. As a photodetector, our device senses longer wavelengths of light than are common in other photochromic devices …”

Section: Results and Discussionmentioning

confidence: 99%

“…One strategy to create OPDs and other light-responsive devices leverages molecular photoswitches (including spiropyran, azobenzene, and diarylethene), which remotely modify the properties of organic semiconductors in response to light. − Among these photoswitches, azobenzenes have been widely studied due to their synthetic accessibility and stable cycling performance . Azobenzenes have been used to modulate the electrical properties of thin-film transistors both under and after illumination when incorporated as the gate insulator or directly in the semiconductor layer. − Generally, these effects are related to charge trapping − or photomediated changes in the azobenzene dipole moment that accompanies cis – trans isomerization. , …”

Section: Introductionmentioning

confidence: 99%

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Multiwavelength Photodetectors Based on an Azobenzene Polymeric Ionic Liquid

Scheuermann

Wakidi

Lill

et al. 2021

ACS Appl. Polym. Mater.

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Organic photodetectors (OPDs) are a promising class of light-detecting devices that can be created with simple fabrication techniques from a large variety of chemical building blocks. While molecular photoswitches are commonly used to modulate the properties of these devices through reversible isomerization or charge transfer, this responsive behavior is typically limited to a small range of wavelengths. Here, we report the characteristics of multiwavelength photodetectors using bilayers of a light-responsive azobenzene polymeric ionic liquid (PIL) in conjunction with the semiconducting polymer poly{( 4). Both ultraviolet (UV) and visible light induce a 10 2 −10 3 increase in current at a constant voltage within 10 s, which decays immediately when the light is turned off. This light-mediated performance is fatigue-resistant across multiple ON/OFF cycles and can be modulated with wavelengths far into the visible region (660 and 700 nm). Frontier energy level calculations of the light-induced charge carrier density indicate that this light-responsive increase in current is due to photoexcitation and a subsequent charge-transfer process between the azobenzene polymeric ionic liquid and the semiconducting polymer. In summary, the device described in this report exhibits sensing capabilities for multiple wavelengths of light corresponding with the azobenzene absorption profile.

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“…Various organic molecules have already been embedded into 2DM-based electronic devices ( e.g. , transistors) as a mean to finely adjust their electrical characteristics, mainly via doping. − In addition, during the last five years considerable efforts have been dedicated to the incorporation of stimuli-responsive molecules, which are able to undergo precise nanoscale rearrangements in response to chemical or physical inputs, as fundamental building blocks in conventional electronic devices . Upon integration of such dynamic molecular systems, the external stimuli may act as an additional remote control to operate the target devices, endowing them with ad hoc properties for specific applications such as memories, , UV sensors, , synapse simulation, , and so on.…”

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confidence: 99%

Asymmetric Dressing of WSe₂ with (Macro)molecular Switches: Fabrication of Quaternary-Responsive Transistors

et al. 2021

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The forthcoming saturation of Moore's law has led to a strong demand for integrating analog functionalities within semiconductor-based devices. As a step towards this goal, we fabricate quaternary-responsive WSe 2 -based field-effect transistors (FETs) whose output current can be remotely and reversibly controlled by light, heat and electric field. A photochromic silaneterminated spiropyran (SP) is chemisorbed on SiO 2 forming a self-assembled monolayer (SAM) that can switch from the SP to the merocyanine (MC) form in response to UV illumination and switch back by either heat or visible illumination. Such SAM is incorporated at the dielectric-semiconductor interface in WSe 2 -based FETs. Upon UV irradiation, a drastic decrease in the output current of 82% is observed and ascribed to the zwitterionic MC isomer acting as charge scattering site. To impart an additional functionality, the WSe 2 top surface is coated with a ferroelectric co-polymer layer based on poly(vinylidene fluoride-cotrifluoroethylene) (P(VDF-TrFE)). Due to its switchable inherent electrical polarization, it can promote either the accumulation or depletion of charge carriers in the WSe 2 channel, thereby 2 inducing a current modulation with 99% efficiency. Thanks to the efficient tuning sparked by the two components and their synergistic effects, the device polarity could be modulated from n-type to p-type. Such a control over the carrier concentration and device polarity is key to develop 2D advanced electronics. Moreover, the integration strategy of multiple stimuliresponsive elements into a single FET allows to greatly enrich its functionality, thereby promoting the development for More-than-Moore technology.

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Multifunctional organic field effect transistors constructed with photochromic molecules

Abstract: Multifunctional organic field effect transistors (OFETs) that integrate different functions in one device have appealed significant interest for its significance for the practical application of OFETs. The past decade has...

Cited by 35 publications

References 69 publications

Photocontrollable Modulation of Frontier Molecular Orbital Energy Levels of Cyclopentenone-Based Diarylethenes

Photocontrollable Modulation of Frontier Molecular Orbital Energy Levels of Cyclopentenone-Based Diarylethenes

Multiwavelength Photodetectors Based on an Azobenzene Polymeric Ionic Liquid

Asymmetric Dressing of WSe₂ with (Macro)molecular Switches: Fabrication of Quaternary-Responsive Transistors

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Multifunctional organic field effect transistors constructed with photochromic molecules

Abstract: Multifunctional organic field effect transistors (OFETs) that integrate different functions in one device have appealed significant interest for its significance for the practical application of OFETs. The past decade has...

Cited by 35 publications

References 69 publications

Photocontrollable Modulation of Frontier Molecular Orbital Energy Levels of Cyclopentenone-Based Diarylethenes

Photocontrollable Modulation of Frontier Molecular Orbital Energy Levels of Cyclopentenone-Based Diarylethenes

Multiwavelength Photodetectors Based on an Azobenzene Polymeric Ionic Liquid

Asymmetric Dressing of WSe2 with (Macro)molecular Switches: Fabrication of Quaternary-Responsive Transistors

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Asymmetric Dressing of WSe₂ with (Macro)molecular Switches: Fabrication of Quaternary-Responsive Transistors