Novel materials for fabrication and encapsulation of OLEDs

Kalyani, N. Thejo; Dhoble, S.J.

doi:10.1016/j.rser.2014.11.070

Cited by 114 publications

(44 citation statements)

References 199 publications

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“…Strategies based on thin flexible films are suitable for passive arrays of sensing/actuating electrodes or related devices (28-32), but they are not immediately applicable to active, semiconductorbased electronic platforms where continuous, or nearly continuous, applied voltages and induced currents are essential for operation (14,18,(33)(34)(35). Organic/inorganic multilayer encapsulation schemes designed to protect flexible consumer electronic devices from oxygen and moisture have some promise (36)(37)(38), but known adaptations of them cannot address the extremely demanding conditions encountered in the body, where full immersion in warm, circulating biofluids on multidecade timescales is required.…”

mentioning

confidence: 99%

Ultrathin, transferred layers of thermally grown silicon dioxide as biofluid barriers for biointegrated flexible electronic systems

Fang

Zhao

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

191

196

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Materials that can serve as long-lived barriers to biofluids are essential to the development of any type of chronic electronic implant. Devices such as cardiac pacemakers and cochlear implants use bulk metal or ceramic packages as hermetic enclosures for the electronics. Emerging classes of flexible, biointegrated electronic systems demand similar levels of isolation from biofluids but with thin, compliant films that can simultaneously serve as biointerfaces for sensing and/or actuation while in contact with the soft, curved, and moving surfaces of target organs. This paper introduces a solution to this materials challenge that combines (i) ultrathin, pristine layers of silicon dioxide (SiO2) thermally grown on device-grade silicon wafers, and (ii) processing schemes that allow integration of these materials onto flexible electronic platforms. Accelerated lifetime tests suggest robust barrier characteristics on timescales that approach 70 y, in layers that are sufficiently thin (less than 1 μm) to avoid significant compromises in mechanical flexibility or in electrical interface fidelity. Detailed studies of temperature- and thickness-dependent electrical and physical properties reveal the key characteristics. Molecular simulations highlight essential aspects of the chemistry that governs interactions between the SiO2 and surrounding water. Examples of use with passive and active components in high-performance flexible electronic devices suggest broad utility in advanced chronic implants.

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mentioning

confidence: 99%

Ultrathin, transferred layers of thermally grown silicon dioxide as biofluid barriers for biointegrated flexible electronic systems

Fang

Zhao

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

191

196

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“…In comparison with PPVS, an improvement of 0.23 eV for electron affinity was observed. However, a lower ionization potential (0.21 eV) was detected; indicating lower air stability [45]. These results can be explained by a higher effective conjugation length in the PAnS compared to PPVS.…”

Section: Electrochemical and Electrical Characterizationmentioning

confidence: 84%

New anthracene-based semi-conducting polymer analogue of poly(phenylene sulfide): Synthesis and photophysical properties

et al. 2015

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“…Step 6: The complex was dried at room temperature and then eventually in the hot air oven at 80°C for two hours [9].…”

Section: Synthesis Proceduresmentioning

confidence: 99%

Structural and Optical Investigation of Novel Europium Hybrid Organic Complex for OLEDs and Solid State Lighting

Chitnis¹,

Kalyani²,

Dhoble³

2017

JMPC

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We report the design and synthesis of volatile europium β-diketonate Eu(dmh) 3 phen organic hybrid complex by precipitation technique. A series of complexes were synthesized for different pH values, ranging between 8.0 and 6.0 maintaining stoichiometric ratio. Among all the synthesized complexes, Eu(dmh) 3 phen with pH 7 exhibits red intense emission at 613 nm with a sharp spectral bandwidth of 5 nm when excited at a wavelength of 372nm,infering that the synthesized complex is pH sensitive. This complex is further assessed for structural, thermal and luminescence behavior in various solvents. X-ray diffractogram reveals its crystalline nature and FTIR confirms the complete formation of the complex revealing the presence of TTA and bipy structure in the metal complex. TGA/DTA exhibits good thermal stability, which is highly essential for fabricating organic light emitting diodes (OLEDs) for solid state lighting. Hypsochromic shift was observed in the optical absorption spectra of Eu(dmh) 3 phen, when the solvent is changed from basic to acidic media.

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Novel materials for fabrication and encapsulation of OLEDs

Cited by 114 publications

References 199 publications

Ultrathin, transferred layers of thermally grown silicon dioxide as biofluid barriers for biointegrated flexible electronic systems

Ultrathin, transferred layers of thermally grown silicon dioxide as biofluid barriers for biointegrated flexible electronic systems

New anthracene-based semi-conducting polymer analogue of poly(phenylene sulfide): Synthesis and photophysical properties

Structural and Optical Investigation of Novel Europium Hybrid Organic Complex for OLEDs and Solid State Lighting

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