Kinetic study of light-driven processes in photochromic dye-doped polymers used as gate insulators in photoswitchable organic field effect transistors

Lutsyk, Petro; Janus, Krzysztof; Sworakowski, J.; Kochalska, Anna; Nešpůrek, S.

doi:10.1016/j.chemphys.2012.01.020

Cited by 15 publications

(5 citation statements)

References 11 publications

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“…In a several papers [ 42 , 43 ], it has been experimentally shown that it is possible to form deep electronic states and a narrow conduction band near the Fermi level in thin dielectric films. In [ 42 ], this conclusion was based on the analysis of the current-voltage characteristics measured near the dielectric-conductor junction within the framework of the injection current model [ 44 ]. In [ 42 ], the energy distribution of electrons near the emission level (the Fermi level of the metal) was directly measured.…”

Section: Methodsmentioning

confidence: 99%

Non-Conjugated Poly(Diphenylene Phthalide)—New Electroactive Material

Karamov,

Galiev,

Lachinov

et al. 2023

Polymers

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In organic electronics, conjugated conductive polymers are most widely used. The scope of their application is currently very wide. Non-conjugated polymers are used much less in electronics and are usually used as insulation materials or materials for capacitors. However, the potential of non-conjugated polymers is much wider, due to the fact that new electronic materials with unique electronic properties can be created on the basis of non-conjugated polymers, as well as other inorganic dielectrics. This article demonstrates the possibilities of creating electrically conductive materials with unique electronic parameters based on non-conjugated polymers. The results of the study of the sensory properties of humidity are given as examples of the practical application of the structure. The abnormal electronic properties are realized along the interface of two polymer dielectrics with functional polar groups. The submicron films of polydiphenylenephthalide were used as a dielectric. It is shown that a quasi-two-dimensional electronic structure with abnormally large values of conductivity and mobility of charge carriers occurs along the interface. These structures are often called quasi-two-dimensional electron gas (Q2DEG). This article describes the manufacturing processes of multielectrode devices. Polymer films are deposited via the spin-coating method with polymer solutions in cyclohexanone. The metal electrodes were manufactured through thermal deposition in a vacuum. Three types of metal electrodes made of aluminum, copper and chromium were used. The influence of the electron work function of contacting metals on the electronic parameters of the structure was studied. It was established that the work function decrease leads to an increase in the conductivity and mobility of charge carriers. The charge carrier parameters were estimated based on the analysis of the current-voltage characteristics within the space-charge-limited current technique. The Richardson-Schottky thermionic emission model was used to evaluate values a potential barrier at metal/organic interfaces. It was established that the change in ambient humidity strongly affects the electronic transport properties along the polymer/polymer interface. It is demonstrated that the increase in conductivity with an increase in humidity occurs due to an increase in the mobility of charge carriers and a decrease in the height of the potential barrier at the three-dimensional metal contact with two-dimensional polymer interface. The potential barrier between the electrode and the bulk of the polymer film is significantly higher than between the electrode and the quasi-two-dimensional polymer structure.

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Section: Methodsmentioning

confidence: 99%

Non-Conjugated Poly(Diphenylene Phthalide)—New Electroactive Material

Karamov,

Galiev,

Lachinov

et al. 2023

Polymers

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“…Such inferior performance of spiropyranes is surprising, since these compounds demonstrate excellent photochromic properties and have been actively explored in organic memory devices. [26][27][28][29][30] In this work, we introduce a light-triggered molecular switch based on the spiropyran/merocyanine salt SP/MC, which operates via reversible photoinduced charge transfer between the chromooxalate anion [Cr(C 2 O 4 ) 3 ] 3À and the [60]fullerene semiconductor forth and back upon the action of light pulses of different wavelengths (405 and 532 nm) without any additional electric bias. These findings suggest that SP/MC is among the first photochromic materials capable of efficient photoisomerization in the solid state, which opens tremendous opportunities for using this material in photonics and memory devices.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A light-triggered molecular switch for an efficient OFET-based organic memory device

et al. 2023

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“…Chemical doping also offers a useful way to integrate new functionalities into conventional OFETs. For instance, optically controllable OFETs have been developed by doping photoisomerization molecules such as spiropyran (SP) and diarylethene. − In these studies, the transistor properties were optically modulated by photoisomerization.…”

Section: Introductionmentioning

confidence: 99%

Optically Controllable Dual-Gate Organic Transistor Produced via Phase Separation between Polymer Semiconductor and Photochromic Spiropyran Molecules

Ishiguro

Hayakawa

Chikyow

et al. 2014

ACS Appl. Mater. Interfaces

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We produced an optically controllable dual-gate organic field-effect transistor by a simple one-step spin-coating of a mixed solution of photochromic spiropyran (SP) and poly(3-hexylthiophene) (P3HT). Postannealing enhanced polymer chain ordering of P3HT to induce phase separation into an SP-rich lower layer and an SP-free upper layer. These layers worked independently as transistor channels with distinct optical responsivity. The top channel was optically inactive, but the bottom channel was optically active, because of the photoisomerization of SP. These results demonstrate the potential of our technique to produce a multifunctional photoactive organic transistor by a simple process.

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Kinetic study of light-driven processes in photochromic dye-doped polymers used as gate insulators in photoswitchable organic field effect transistors

Cited by 15 publications

References 11 publications

Non-Conjugated Poly(Diphenylene Phthalide)—New Electroactive Material

Non-Conjugated Poly(Diphenylene Phthalide)—New Electroactive Material

A light-triggered molecular switch for an efficient OFET-based organic memory device

Optically Controllable Dual-Gate Organic Transistor Produced via Phase Separation between Polymer Semiconductor and Photochromic Spiropyran Molecules

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