Organic semiconductors: fundamentals and applications

Kowalsky, Wolfgang; Becker, E.; Benstem, T.; Johannes, Hans‐Hermann; Metzdorf, D.; Neuner, H.; Schöbel, J.

doi:10.1007/bfb0108396

Cited by 9 publications

(5 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite of synthesized and studied of organic semiconducting but the performance and stability of this materials were poor [4]. The performance of the organic materials can be increased by making improvement in the fabrication of the device rather than focusing on the complexity of the internal structure of the material [5]. Small molecules and polymer are types of organic semiconductors according to the molecular size [6].…”

Section: Introductionmentioning

confidence: 99%

Annealing effect on the structural and Morphological properties of Organic Semiconductor Alq3:C60 blend Thin Films

Noori

Abbas

Abdulameer

2018

ijs

View full text Add to dashboard Cite

In this work, has been a studied the effect of thermal treatment using different annealing temperatures (373, 423 and 473) K in vacuum on structural and morphological properties of organic semiconductor Alq 3 :C 60 thin films which are prepared by the spin coating on a glass, silicon and porous silicon. These films have been coated on substrates with speed of 2000 rpm. The structure properties of Tris(8-hydroxyquinoline) aluminum (III) (Alq 3) and fullerene (C 60) (100:1) and (100:10) blend as-deposited and treated have been studied by X-ray diffraction (XRD) for glass only and morphological properties by Atomic Force Microscope (AFM) for silicon and porous silicon substrates. The results of XRD pattern shows that the structure of (Alq 3 :C 60) as-deposited and annealed thin films are polycrystalline in nature for both mixed weight ratio. The result of AFM measurements show that grain size increase is due to the increases of surface energy at high temperature. Surface roughness increasing and decreased randomly with the temperature can be attributed to the random distributions of the grains and also due to the phase change.

show abstract

Section: Introductionmentioning

confidence: 99%

Annealing effect on the structural and Morphological properties of Organic Semiconductor Alq3:C60 blend Thin Films

Noori

Abbas

Abdulameer

2018

ijs

View full text Add to dashboard Cite

show abstract

“…[30][31][32][33] For example, the essential structuralf eature of polymerics emiconductors in OSC applications is a p-conjugated backbone composed of linked unsaturated units, resulting in extended p orbitals along the polymer chain,a nd thuse nabling proper charge transporta nd optical absorption. [23,[34][35][36] 1,2-Di-(2-thienyl)-ethene (TVT) is ap romising buildingb lock to extend p orbitals of the semiconducting materials. [23,37] Nevertheless, due to its electron-rich property,t he HOMO energy levels of the resulting donor materials would probablyi ncreasea tt he same time by introducing the TVT unit into the backbone, which will decrease the V oc value.…”

Section: Introductionmentioning

confidence: 99%

Conjugated Oligothiophene Derivatives Based on Bithiophene with Unsaturated Bonds as Building Blocks for Solution‐Processed Bulk Heterojunction Organic Solar Cells

Cui

Cheung

et al. 2016

Chemistry An Asian Journal

View full text Add to dashboard Cite

A new building block ATVTA that uses stiff carbon-carbon triple bonds (A) on 1,2-di(2-thienyl)-ethene (TVT) has been developed. Oligothiophene derivatives S-01 with a TVT unit, S-02 with a 5,5'-diethynyl-2,2'-dithienyl (AT2) unit and S-03 with ATVTA were synthesized to compare their effects in a systematic study. Due to the better π-conjugation extension of the TVT unit, S-01 exhibits the most red-shifted absorption profile among them, whereas S-02 possesses the deepest HOMO level. While the HOMO level of S-03 is down-shifted by 0.02 eV relative to that of S-01, the alkyne linkages can effectively down-shift the HOMO level. By replacing the terminal units of S-03 with stronger electron acceptors, S-04 and S-05 exhibited broader absorption profiles and lower HOMO levels than those of S-03. Organic solar cells based on these molecules were fabricated and an S-03:PC BM (1:1, w/w) based device afforded the highest V value of 0.96 V and a power conversion efficiency (PCE) of 2.19 %.

show abstract

“…Conjugated polymer has a great attention because these materials are potentially useful for many application especially in light emitting diode [1], solar cells [2], semiconductors [3], biosensors [4], chemo sensors [5], field-effect transistors (FETs) and photorefractive devices. Polyaniline, polypyrrole, polythiophene and polycarbazole has been extensively studied because of their processibility and relative stability [6].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and opto-electrical properties of carbazole functionalized quinoline based conjugated oligomer for luminescent devices

Upadhyay

Karpagam

2015

J. Photopol. Sci. Technol.

View full text Add to dashboard Cite

Carbazole and quinoline combined donor-acceptor (QUI-OCZ) conjugated oligomer was synthesized by Wittig route. The resulting oligomer structure was well established by FTIR, NMR, Gel permeation chromatography (GPC) and elemental analysis. The resulting oligomer exhibits good solubility in common organic solvents.The optical and potential charge transporting properties of the oligomer were investigated by UV-visible, fluorescence spectroscopy and cyclic voltammetry. The UV-visible spectrum of the oligomer exhibited a sharp absorption band at 275-325 nm with shoulder peak at 374 nm. The oligomer also showed the fluorescence emission at 420 -451 nm. The optical energy band gap and quantum yield of the oligomer was found to be 2.58eV and 0.237. In addition, quenching effect of QUI-OCZ was carried out by adding N, N-dimethyl aniline (electron donor) and dimethyl terephthalate (electron acceptor). The morphology of the oligomer film was examinedby atomic force microscopy (AFM) and observed spherical shape of particles with micrometre in size. The electrochemical studies of QUI-OCZ revealed that the HOMO and LUMO energy level was -5.74 and -3.17 eV respectively. Preliminary reports suggested that the oligomer will behighly useful for organic light emitting diode application.

show abstract

Organic semiconductors: fundamentals and applications

Cited by 9 publications

References 18 publications

Annealing effect on the structural and Morphological properties of Organic Semiconductor Alq3:C60 blend Thin Films

Annealing effect on the structural and Morphological properties of Organic Semiconductor Alq3:C60 blend Thin Films

Conjugated Oligothiophene Derivatives Based on Bithiophene with Unsaturated Bonds as Building Blocks for Solution‐Processed Bulk Heterojunction Organic Solar Cells

Synthesis and opto-electrical properties of carbazole functionalized quinoline based conjugated oligomer for luminescent devices

Contact Info

Product

Resources

About