Evolutionary parameter extraction for an organic TFT compact model including contact effects

Romero, A.; González, Jesús; Picos, R.; Deen, M. Jamal; Jiménez-Tejada, J.A.

doi:10.1016/j.orgel.2018.05.062

Cited by 13 publications

(39 citation statements)

References 59 publications

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“…The physical mechanisms that take place at the contact region of an OTFT influence the final functional appearance of a model that aims to describe the current-voltage characteristics of the device. This is the case of a widely-used [31,34,36,[41][42][43][44][45][46] generic model for OTFTs [19,20]:…”

Section: Models For the Contact Region Of Otftsmentioning

confidence: 99%

“…where M C and m k are two parameters related to different physical variables [see (4)- (8)]. The application of the combined model (1) and (3) can be found in different kinds of OTFTs [36,41,[48][49][50][51][52][53][54].…”

Section: Space-charge Limited Transportmentioning

confidence: 99%

“…The relation (7) has been checked experimentally in OTFTs that are free of hysteresis and free of local non-uniformities in the contact region [31,36,[48][49][50][51]. In this regard, the relation (7) can be used as a test to detect a different behavior between the contact region and the active channel such as the existence of different kinds of traps or defects.…”

Section: Space-charge Limited Transportmentioning

confidence: 99%

“…In this work, we use a method that analyzes only the output characteristics measured in a single short-length transistor [36]. The internal parameters of the OTFT and the voltage drop at the source contact are extracted using an evolutionary procedure.…”

Section: Determination Of the Voltage Drop At The Contactmentioning

confidence: 99%

“…In Section 3, the validity of the model is checked with a recently proposed multi-objective evolutionary parameter extraction method, which extracts the parameters of the model and current-voltage (I D − V C ) curves at the contact [31,36,37]. The results of the procedure, which analyzes output characteristics measured in transistors with the same channel length, is compared to the results of other methods based on measurements taken in transistors with different lengths.…”

Section: Introductionmentioning

confidence: 99%

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Versatile model for the contact region of organic thin-film transistors

Romero

González

Deen

et al. 2020

Organic Electronics

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Contact effects in organic thin film transistors (OTFTs) remain an important problem to be solved in these devices. Therefore, the correct physio-chemical modeling of the contact regions in OTFTs is necessary. In this work, a standard model for the contact region of OTFTs is proposed. It is a versatile model that describes the current-voltage characteristics of different kinds of contacts. It reproduces the behavior of Schottky barrier or space-charge limited contacts. It is a simple unified model since only a single parameter is necessary in order to distinguish between both kinds of contacts. The model is easily integrated in a generic compact model for the current-voltage characteristics of OTFTs. The resulting compact model, used in combination with an evolutionary parameter extraction procedure, allows to extract the intrinsic parameters and the current-voltage curves at the contact of single short-channel transistors. There is no need to use transistors with multiple channel lengths to accurately characterize the contact region or the active channel of the transistor. The model is tested with published experimental data of OTFTs with Schottky barrier or space-charge limited contacts. Finally, the method has been used as a diagnostic tool to analyze how an ammonia sensor reacts to different concentrations of the ammonia gas. Interestingly, alterations in the contact region have been detected when the gas concentration varies, transforming the space-charge limited contact of a pristine OTFT into a Schottky barrier contact under the exposure of gas.

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Section: Models For the Contact Region Of Otftsmentioning

confidence: 99%

Section: Space-charge Limited Transportmentioning

confidence: 99%

Section: Space-charge Limited Transportmentioning

confidence: 99%

Section: Determination Of the Voltage Drop At The Contactmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Versatile model for the contact region of organic thin-film transistors

Romero

González

Deen

et al. 2020

Organic Electronics

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Modeling of Electrical Characteristics of Thin-Film Transistors Based P3HT:ZnO Blend: Channel Length Layer Effect

Erouel

Mansouri

et al. 2023

J. Electron. Mater.

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Compact modeling of the effects of illumination on the contact region of organic phototransistors

Romero

Jiménez

González

et al. 2019

Organic Electronics

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A good modeling of degrading effects in an electronic device, such as the contact region of organic phototransistors (OPTs), can be favorably used to better describe and optimize the performance of the whole device. Furthermore, a proper design of the contacts can enhance the exciton dissociation and the extraction of photogenerated charge in the device. In this work, a compact model for OPTs is developed. This model is valid for all the operation regimes of the transistors. It includes a model for the contact region of the device that incorporates the effects of illumination. The compact model and the contact region model are validated with published experimental data from several OPTs under different illumination conditions. The tool used to validate the model is an evolutionary parameter extraction procedure developed in a previous work. The results show that both photoconductive and photovoltaic effects impact the intrinsic region of the transistor, as well as the electrical behavior of the contact region. The parameters used in the contact region model are linked to these photovoltaic and photoconductive effects.

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Evolutionary parameter extraction for an organic TFT compact model including contact effects

Cited by 13 publications

References 59 publications

Versatile model for the contact region of organic thin-film transistors

Versatile model for the contact region of organic thin-film transistors

Modeling of Electrical Characteristics of Thin-Film Transistors Based P3HT:ZnO Blend: Channel Length Layer Effect

Compact modeling of the effects of illumination on the contact region of organic phototransistors

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