Organic Optoelectronic Materials

Li, Yongfang

doi:10.1007/978-3-319-16862-3

Cited by 39 publications

(8 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The thermogravimetric analysis (TGA) was performed using a Mettler Toledo instrument (TG) under nitrogen atmosphere. 1 H and 13 C NMR spectra were recorded using CDCl 3 on Varian 300 MHz Ultra shield spectrometer with tetramethylsilane (TMS) as an internal reference at working frequency 300 MHz and 75 MHz respectively. Fourier transform infrared (FT-IR) spectra were recorded on a Perkin Elmer Frontier 91579.…”

Section: Instrumentation and Methodsmentioning

confidence: 99%

“…Additionally, the charge transport in an organic molecule is very important to realize for their application in devices. Organic materials should have HOMO/LUMO energy levels comparable to the work function of commonly used electrodes (Anode: ITO and Cathode: Ca/Al/Mg) to facilitate charge transport [13]. Organic semiconducting molecules which have HOMO(LUMO) levels at around 5.0(4.0) eV are capable of hole(electron) transport and known as hole(electron)-transporting or p(n)-type materials [14,15].…”

Section: Introductionmentioning

confidence: 99%

“…Organic materials should have HOMO/LUMO energy levels comparable to the work function of commonly used electrodes (Anode: ITO and Cathode: Ca/Al/Mg) to facilitate charge transport [13]. Organic semiconducting molecules which have HOMO(LUMO) levels at around 5.0(4.0) eV are capable of hole(electron) transport and known as hole(electron)-transporting or p(n)-type materials [14,15]. Compared to p-type, the development of n-type materials has lagged due to their di cult synthesis and instability under ambient conditions (in presence of H 2 O/O 2 ).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fluorescent indolo[2,3-b]quinoxalin-2-yl(phenyl)methanone dyes: photophysical, AIE activity, electrochemical, and theoretical studies

et al. 2022

View full text Add to dashboard Cite

Herein, we have synthesized four indolo [2,3-b]quinoxalin-2-yl)(phenyl)methanone derivatives 1−4 by cyclocondensation. The photophysical studies of dyes in various solvents and neat solid lm exhibit typical electronic spectra with inbuilt intramolecular charge transfer (ICT) (λ max : 397-490 nm) con rming donoracceptor architecture. Herein, dyes uoresce in the blue-orange region (λ Emax : 435-614) on excitation at their ICT maxima in toluene, ethyl acetate, chloroform, DMSO, and neat solid lm. 1 and 2 which exhibit good emission intensity in all mediums, were studied for aggregation-induced emission (AIE) effect.Electrochemical studies indicate 1−4 possess relatively low lying LUMO (-3.65 to -3.98 eV) comparable to reported n-type/electron-transporting materials. The HOMO and LUMO energy levels in 1−4 were evaluated by DFT and TD-DFT calculations. TGA analysis shows 1−4 exhibit good thermal stability. The characteristic optoelectronic properties and thermal stability signify these dyes are potential candidate for their application in optoelectronics.

show abstract

Section: Instrumentation and Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fluorescent indolo[2,3-b]quinoxalin-2-yl(phenyl)methanone dyes: photophysical, AIE activity, electrochemical, and theoretical studies

et al. 2022

View full text Add to dashboard Cite

show abstract

“…As described above, the electrons and holes recombine and form neutral excitons in the EML. According to spin statistics, the recombination will populate singlet and triplet excited states in a ratio of 1:3, meaning that 75% of the electrically excited states are triplet states [14]. Pure organic molecules usually do not show spin-forbidden triplet emission (i.e., phosphorescence) at room temperature [15,16], and normally only the singlet exciton is emissive, resulting in limited quantum efficiency, which presents a challenge for improving the efficiency of OLED devices.…”

Section: Introductionmentioning

confidence: 99%

Tetradentate Platinum(II) Emitters: Design Strategies, Photophysics, and OLED Applications

Li¹,

Lam²,

Yan³

et al. 2020

Liquid Crystals and Display Technology

View full text Add to dashboard Cite

This chapter provides an overview of tetradentate platinum(II) emitters as a promising class of metal-organic phosphorescent dopants for organic light-emitting diodes (OLEDs). Tetradentate platinum(II) emitters showing blue, green, and red light emissions, which are essential for full color displays as well as white light emission, are reviewed and discussed in the context of molecular design and photophysical and electroluminescent properties. Emphasis is placed on the molecular structures, the nature of emissive excited states [including ligand-centered (LC), intra-ligand charge transfer (ILCT), metal-to-ligand charge transfer (MLCT), and excimeric and oligomeric metal-metal-to-ligand charge transfer (MMLCT)], the intermolecular interactions impacting photophysical attributes (e.g., emission energies, quantum yields, and decay times), and OLED device performances.

show abstract

“…As a standout amongst conducting polymers, PANI has major limitation in rendering the electrical properties. This is expected to be due to the crucial dopant selection process [5]. Distinctive sort of dopants may indicate diverse conductivity in PANI system [7].…”

Section: Introductionmentioning

confidence: 99%

Electrically Conductive Polyester Fabrics Embedded Polyaniline

Omar¹,

Ariffin²,

Akhir³

et al. 2019

IJET

View full text Add to dashboard Cite

Recently, conductive fabric has attracted massive attention among researchers due to their unique conductive properties with a wide range of possible applications. This study explores the fabrication of poly aniline (PANI) conductive fabric through an immersion technique of polyester fabric in PANI solution. Two types of acids (sulphuric acid (H2SO4) and p-toulene sulfonic acid (pTSA) have been employed as the doping agent to induce the conductivity in various weight percentages (0.3, 0.6 and 0.9 wt%) with immersion time of 5, 10 and 15 minutes. The fabricated conducting fabrics were then characterized by Fourier Transform Infrared Spectroscopy with attenuated total reflection (FTIR-ATR) and X-ray Diffraction (XRD) for analyses of chemical structure and phase identification respectively. Their morphologies were observed by Scanning Electron Microscope (SEM) which revealed the various fibrous structure. The finding is in line with the electrical conductivity properties of the fabrics observed using Four-point probe technique. Optimum conductivity of the conductive fabrics were found to be at 0.6 wt. % for both types of acid which are 1.30 x 10-2 S/cm (H2SO4) and 1.39 x10-3 S/cm (pTSA). Meanwhile, the varied immersion time showed no significant changes on this property, due to the short time laps. For FTIR results, the peaks confirmed the presence of PANI-EB together with the introduced acid within the PANI backbone. Collectively, H2SO4 is found to be a good candidate as doping agent, deduced from obtained conductivity values and structural properties.

show abstract

Organic Optoelectronic Materials

Cited by 39 publications

References 50 publications

Fluorescent indolo[2,3-b]quinoxalin-2-yl(phenyl)methanone dyes: photophysical, AIE activity, electrochemical, and theoretical studies

Fluorescent indolo[2,3-b]quinoxalin-2-yl(phenyl)methanone dyes: photophysical, AIE activity, electrochemical, and theoretical studies

Tetradentate Platinum(II) Emitters: Design Strategies, Photophysics, and OLED Applications

Electrically Conductive Polyester Fabrics Embedded Polyaniline

Contact Info

Product

Resources

About