Flexible and transparent organic film speaker by using highly conducting PEDOT/PSS as electrode

Lee, C.S.; Kim, J.Y.; Lee, D.E.; Joo, Jinsoo; Wagh, B.G.; Han, Sung Hee; Beag, Y. W.; Koh, Seok‐Keun

doi:10.1016/s0379-6779(03)00199-1

Cited by 59 publications

(35 citation statements)

References 25 publications

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“…In the case, of highly heated substrate, surface tension gradients lead to "Marangoni" flow and the "coffee cup ring" effect [38][39][40][41][42][43][44][45][46], as is presented in Figure 10(b), which also leads to columns of transversely aligned PEDOT grains. At a substrate temperature of 303 K, inkjet printing using the printing system in this study generates a flat top surface profile, as is presented in Figure 7(a) [38], with expected convective circulating flow as illustrated in Figure 10 Addition of DMSO and other co-solvents has been reported to increase the in-plane conductivity of both inkjet printed [8,9] and spin coated PEDOT:PSS [15,19,[47][48][49][50] by acquiring a morphology of more coarsened PEDOT grains and reduction of the charge hopping distance [9], while 1D-M-VRH charge transport also applies to in-plane conduction. As transverse conduction is already controlled by 1D-M-VRH charge transport -18 -in inkjet printed PEDOT:PSS films without any co-solvents in this study, further coarsening of PEDOT grains aligned in the transverse direction is expected by adding DMSO up to 5 wt% in the printing ink [9], which is expected to further raise the transverse conductivity of inkjet printed PEDOT:PSS above the values of the transverse conductivity of spin coated PEDOT:PSS with a co-solvent, where the latter totally lacks any transverse PEDOT grain alignment.…”

Section: Discussionmentioning

confidence: 93%

Transverse charge transport in inkjet printed poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS)

Wilson

Lei

Lekakou

et al. 2014

Organic Electronics

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Section: Discussionmentioning

confidence: 93%

Transverse charge transport in inkjet printed poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS)

Wilson

Lei

Lekakou

et al. 2014

Organic Electronics

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“…14 The main advantages of the PEDOT:PSS-based electrodes are their mechanical flexibility, high transparency, and low price. 15,16 Due to the high processing temperature the direct growth of ZnO NRs on plastic substrates remains unexplored.…”

Section: Introductionmentioning

confidence: 99%

ZnO-organic hybrid white light emitting diodes grown on flexible plastic using low temperature aqueous chemical method

Bano

Zaman

Zainelabdin

et al. 2010

Journal of Applied Physics

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We demonstrate white light luminescence from ZnO-organic hybrid light emitting diodes grown at 90°C on flexible plastic substrate by aqueous chemical growth. The configuration used for the ZnO-organic hybrid white light emitting diodes ͑WLEDs͒ consists of a layer of poly ͑9, 9-dioctylfluorene͒ ͑PFO͒ on poly ͑3, 4-ethylenedioxythiophene͒ poly ͑styrenesulfonate͒ coated plastic with top ZnO nanorods. Structural, electrical, and optical properties of these WLEDs were measured and analyzed. Room temperature electroluminescence spectrum reveals a broad emission band covering the range from 420 to 750 nm. In order to distinguish the white light components and contribution of the PFO layer we used a Gaussian function to simulate the experimental data. Color coordinates measurement of the WLED reveals that the emitted light has a white impression. The color rendering index and correlated color temperature of the WLED were calculated to be 68 and 5800 K, respectively.

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“…As can been seen from Fig. 7, the resonant frequency is about 150 Hz, which is much lower than other reported thin-film speakers in [8], [9], [17], and [18], and it is low enough for many ANC applications and general-purpose loudspeakers. Compared to other reported thin-film speakers, this speaker also requires a much lower drive voltage (about 1/8 1/50), which removes the need for expensive high-power voltage amplifiers and results in much less power consumption.…”

Section: B Prototype Transparent Pvdf Thin Film Speakermentioning

confidence: 70%

“…Another transparent conductive material is poly (3, 4-ethylenedioxythiophene)-poly (4-stryrenesulfonate) (PEDOT:PSS) which has good flexibility [16]. However, its low transparency and low conductivity significantly limit its performance as electrodes [17], [18]. Single-walled carbon nantotubes (SWNTs) have also been investigated for fabricating flexible transparent conductive thin films due to their high conductivity and high aspect ratio.…”

Section: A Transparent Conductive Thin Filmsmentioning

confidence: 99%

Active Control of Sound Transmission Through Windows With Carbon Nanotube-Based Transparent Actuators

Rajamani

Stelson

et al. 2007

IEEE Trans. Contr. Syst. Technol.

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This paper explores the development of active sound transmission control systems for windows that can achieve a significant reduction in window noise transmission. Two major challenges need to be addressed in order to make the development of such noise blocking windows feasible. These are the need for a distributed actuation system that is optically transparent and the unavailability of a real-time reference signal that can be used by the active control system to provide advance information on the noise affecting the window. To address the first challenge, a transparent thin-film actuator (speaker) is first developed for the control system, which consists of a piezoelectric poly (vinylidene fluoride) (PVDF) thin film coated with compliant carbon nanotube-based transparent conductors on both sides. The developed thin-film speaker shows excellent acoustic response over a broadband frequency range, and has the advantages of being flexible, transparent, thin, and lightweight. To address the second challenge of providing a time-advanced reference signal from a moving noise source, a small microphone array distributed on the outside wall of the home is used. New noise source identification algorithms are employed, by which an appropriate microphone from the array can be chosen to provide a reference signal. Experimental results show that over 12 dB reduction in sound transmission is achieved globally in the case of broadband sound, which demonstrates the effectiveness of the control system in blocking sound transmission.Index Terms-Active noise control (ANC), carbon nanotubes, noise source identification, sound transmission, transparent thin-film actuator, windows.

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Flexible and transparent organic film speaker by using highly conducting PEDOT/PSS as electrode

Cited by 59 publications

References 25 publications

Transverse charge transport in inkjet printed poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS)

Transverse charge transport in inkjet printed poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS)

ZnO-organic hybrid white light emitting diodes grown on flexible plastic using low temperature aqueous chemical method

Active Control of Sound Transmission Through Windows With Carbon Nanotube-Based Transparent Actuators

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