Organic Polymer Thin-Film Transistor Photosensors

Hamilton, Michael C.; Kanicki, Jerzy

doi:10.1109/jstqe.2004.833972

Cited by 82 publications

(49 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 2.Parameter values that give a good agreement between the measured characteristics and those obtained by the equation (15). 1.0x10 4,0x10 5 6,0x10 5 8,0x10 5 1,0x10 6 1,2x10 6 4.0x10 5 6.0x10 5 8.0x10 5 1.0x10 6 1.2x10 6 Table.2.…”

Section: Resultsmentioning

confidence: 99%

“…Organic Thin-Film Transistors (OTFTs) have received intensive interest because of their many advantages such as light-weight, low cost manufacture, structural flexibility and low temperature processing [1][2][3] that make them promising candidates in several areas of technology including gas sensors, smart cards, active-matrix displays and radio-frequency identification tags [4][5][6][7][8]. On the other hand, OTFTs provide multiple detection parameters like the inverse subthreshold swing (SS), the threshold voltage V th , the field-effect mobility µ FET , the current ratio I on /I off and the turn-on voltage V on [9].The stability of organic transistors represents a major challenge that must be addressed for making this technology relevant and reliable.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Reversibility of humidity effects in pentacene based organic thin-film transistor: Experimental data and electrical modeling

Boukhili¹,

Mahdouani²,

Erouel

et al. 2015

Synthetic Metals

View full text Add to dashboard Cite

P-type organic thin-film transistors (OTFTs), in which the active semiconductor is made of pentacene with silicon dioxide as a gate insulator, were fabricated and characterized. The effects of humidity on the electrical characteristics of pentacene based thin-film transistors (pentacene-TFTs) in the linear and saturation regimes were investigated. We report the variation of the electrical parameters by relative humidity (RH) extracted from the experimental electrical characteristics current-voltage of pentacene-TFT devices. We show that the diffusion of water molecules (H 2 O), the creation of acceptor states due to the presence of oxygen and the formation of clusters in the pentacene active layer considerably affect the stability and the performances of pentacene-TFTs. The degradation of electrical parameters of the pentacene-TFTs under relative humidity (RH) can be recovered with a simple pumping under vacuum (3×10 -5 to 5×10 -5 mbar). We also show that the changes introduced by the effects of humidity are reversible. Moreover the pentacene-TFT presents an intensive response for a high relative humidity (RH=57%), which could be used for a humidity detection device technology.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reversibility of humidity effects in pentacene based organic thin-film transistor: Experimental data and electrical modeling

Boukhili¹,

Mahdouani²,

Erouel

et al. 2015

Synthetic Metals

View full text Add to dashboard Cite

show abstract

“…Despite the fact that organic transistors are intended to operate primarily in optoelectronic devices ͑e.g., active-matrix displays͒, surprisingly little is known about light-induced effects in OFETs. In thin-film organic transistors, light illumination produced a weak photoconductivity response ͓see, e.g., Narayan and Kumar ͑2001͔͒, reduces the threshold voltage ͑Hamilton and Kanicki, 2004;Saragi et al, 2004;Noh et al, 2005͒, and reverses the ͑dark͒ bias stress effect ͑Salleo and . Large concentration of defects in organic films that trap light-generated carriers and/or act as recombination centers complicate these experiments and their interpretation.…”

Section: Discussionmentioning

confidence: 99%

Colloquium: Electronic transport in single-crystal organic transistors

2006

View full text Add to dashboard Cite

Small-molecule organic semiconductors, together with polymers, form the basis for the emerging field of organic electronics. Despite the rapid technological progress in this area, our understanding of fundamental electronic properties of these materials remains limited. Recently developed organic field-effect transistors ͑OFETs͒ based on single crystals of small-molecule organic materials are characterized by an unprecedented quality and reproducibility. These devices provide a unique tool to study the fundamentals of polaronic transport on organic surfaces and to explore the limits of OFET performance. This Colloquium focuses on the intrinsic, not limited by static disorder, charge transport in single-crystal OFETs and on the nature of defects on surfaces of organic crystals. In the conclusion, an outline of the outstanding problems that are now becoming within experimental reach owing to the development of single-crystal OFETs is presented.

show abstract

“…Consequently, organic photoFETs are promising device to realize a full-organic image sensors. Most works on organic photoFETs focuses on finding an expression for the photocurrent in function of the illumination power [17][18][19]24 but avoid to mention the illumination time. However, as an organic photoFET is an integrating device, different devices can not be compared without mentioning the illumination time.…”

Section: -23mentioning

confidence: 99%

“…where I D,d,n is the dark current for electrons , while Hamilton et al 17 claim a power law relationship…”

mentioning

confidence: 99%

Pentacene organic field-effect phototransistor with memory effect

et al. 2006

View full text Add to dashboard Cite

Now organic thin film transistor technology gains growing maturity, high performance organic photodetectors are the missing link towards full organic photosensitive sensor arrays, needed for the realization of applications like organic scanners and organic cameras. In the borderline of the research in organic solar cells, research in organic photodetectors has mainly been limited to organic photodiodes. However, phototransistors offer the possibility to reach higher sensitivities, thanks to the internal current gain of a transistor structure. This document focuses on organic field-effect phototransistors (organic photoFETs) where illumination can be used as an optical gate signal in addition to the electrical gate signal. An experimental description of pentacene photoFETs during broadband illumination is given. A distinction between the direct photocurrent and the additional current enhancement by a thresholdshift can be made, and a relation for this thresholdshift in function of time is revealed. Consequently, the difficulty to compare different organic photoFETs without any information about the illumination time is highlighted and a comparison based on this power law is proposed. Subsequently it is pointed out that by the stability of this thresholdshift after illumination, the pentacene photoFET does not only act as a light detector but also as a memory element, capable to store information about illumination power and duration for an extended amount of time.

show abstract

Organic Polymer Thin-Film Transistor Photosensors

Cited by 82 publications

References 37 publications

Reversibility of humidity effects in pentacene based organic thin-film transistor: Experimental data and electrical modeling

Reversibility of humidity effects in pentacene based organic thin-film transistor: Experimental data and electrical modeling

Colloquium: Electronic transport in single-crystal organic transistors

Pentacene organic field-effect phototransistor with memory effect

Contact Info

Product

Resources

About