Organic light emitting diodes

Ebook "Molecular spintronics: From organic semiconductors to self-assembled monolayers" will focus on the study of organic semiconductors spintronic devices, here Alq3-based spin valves. We will investigate magnetoresistance (MR) effects at room temperature using conventional ferromagnetic (FM) materials. These investigations were done wishing to improve the understanding on the two interfaces and disentangle their contributions on the spin polarization properties of the devices.

191p tracanhphuonghoa1007 22-04-2024 3 2   Download

Ebook "Spin dynamics in radical pairs" sheds new light on the dynamical behaviour of electron spins in molecules containing two unpaired electrons (i.e. a radical pair). The quantum dynamics of these spins are made complicated by the interaction between the electrons and the many nuclear spins of the molecule; they are intractable using analytical techniques, and a naïve numerical diagonalization is not remotely possible using current computational resources.

167p lamquandat 28-12-2023 6 2   Download

Highly conductive PEDOT:PSS is one of the most promising materials for indium tin oxide (ITO) substitution in printed electronics. Here, we report the development and optimisation of two PEDOT:PSS ink formulations for the fabrication of inkjet-printed transparent conductive layers.

10p viberbers 09-08-2023 4 3   Download

In this first of two review papers, we present major experimental results on OMAR studies and current understanding of OMAR using several spin dependent processes in organic semiconductors. During the discussion, we highlight some of the outstanding challenges in this promising research field. Finally, we provide an outlook on the future of organic spintronics.

13p viberbers 09-08-2023 4 3   Download

Synthetically feasible and cost effective Ni(II) complex phosphor (4) as green organic light emitting diode (OLED) was prepared by using Schiff base 1-[(4-butylphenyl)imino]methyl naphthalen-2-ol (3). The single crystals of Ni(II) complex were grown from chloroform and hexane (1:1 v/v) solution.

6p viberbers 09-08-2023 5 3   Download

The major advances and challenges in OSVs will be highlighted. Secondly, the recent advances in fabricating spin-OLEDs and the challenges for getting the high performance of spin-OLEDs will be reviewed and analyzed. Finally, we suggest an outlook on the future of organic spintronics by using organic single crystals and aligned polymers.

17p viberbers 09-08-2023 6 3   Download

In this study, 5 benzo[d]thiazole (3a-3e) derivatives were successfully synthesized in 2 steps through Suzuki cross-coupling reaction from 2-(4-bromophenyl)benzo[d]thiazole (2) and arylboronic acid derivatives in 80-95%.These compounds’ structure was determined through NMR and mass spectral analysis.

6p viberkshire 09-08-2023 8 4   Download

This study aimed to synthesize an oligo(azomethine-ether) with benzothiazole moiety in organic medium by means of chemical oxidative polycondensation (OP). Optical properties were examined by photoluminescence (PL) and UV-Vis measurements both in solutions and solid film involved a poly (methyl methacrylate) (PMMA) matrix. Oligomer film in the PMMA matrix emitted a fine green light with a fluorescence quantum yield (QY) of 3.30%. Spectral and thermal observations showed a high rate of C–O–C coupling (cross-linking) for the oligomer.

18p langthannam 29-12-2021 7 1   Download

The one-pot synthesis of novel 1,4-disubstituted 1,2,3-triazoles from isoquinoline-substituted homopropargyl alcohol backbone is described (42%–88% yields). A ring closing metathesis reaction and an intramolecular Pauson–Khand reaction of enyne system derived from a homopropargyl alcohol backbone to afford the corresponding isoquinolinesubstituted dihydropyran and cyclopentenone-pyran, respectively, are also described (54% and 78% yields).

12p langthannam 29-12-2021 9 0   Download

The nucleophilic substitution reactions of mono- and bis-spiro-2,2′ -dioxybiphenyl cyclotriphosphazenes (3 and 4) with cyclopropanemethylamine (5) and aniline (6) were performed in the presence of trimethylamine in THF. Five novel cyclopropanemethylamino- and anilino-substituted spiro-2,2′ -dioxybiphenyl cyclotriphosphazene derivatives (7–11) were obtained from these reactions. The molecular structures of the new cyclotriphosphazene derivatives (7– 11) were characterized by elemental analysis, MALDI-TOF MS, FT-IR, and NMR ( 31P and 1H) spectroscopies.

23p tudichquannguyet 29-11-2021 6 1   Download

Two-dimensional (2D) perovskites are a new class of functional materials that may find applications in various technologically important areas. Due to the better moisture and illumination stability, layered perovskites can be the next generation of materials for solar light-harvesting applications, as well as for light emitting diodes (LEDs).

12p tamynhan4 06-09-2020 11 1   Download

Three new derivatives containing thieno[3,2-b]thiophene, ethyl 5- (anthracen-9-yl)thieno[3,2-b]thiophene-2-carboxylate (1a), ethyl 5-(4-cyanophenyl) thieno[3,2-b]thiophene-2-carboxylate (1b) and 3-(5-(anthracen-9-yl)thieno[3,2-b] thiophen-2-yl)pyridine (2a) were synthesized by arylation reaction in presence of 1.0 mol% of Pd(OAc)2. Their structures were elucidated with NMR, MS and XRay analysis. The selectivity of arylation was at C6 of either ester or pyridine substituted instead of C2 positions.

7p nguathienthan6 06-07-2020 13 0   Download

Capability of exciplex energy transfer through a spacer was investigated using three exciplex-forming solid mixtures which contained the well-known electron accepting 2,4,6-tris[3-(diphenylphosphinyl)phe nyl]-1,3,5-triazine and appropriately designed bipolar cyanocarbazolyl-based derivatives functionalized by attachment of carbazolyl, acridanyl or phenyl units. These novel cyanocarbazolyl-based derivatives were used as both the spacer and exciplex-forming donor.

11p covid19 14-06-2020 16 0   Download

Aluminium tris(4-morpholinyl-8-hydroxyquinoline) has been synthesized and characterized. The photoluminescence measurements showed that the new derivative is blue shifted and has relative photoluminescence quantum yield two times higher compared to the pristine Al tris(8- hydroxyquinoline). Deferential scanning colorimetric studies revealed that the newly synthesized Alq3 derivative in this work is amorphous material with the highest transition glass temperature value among the reported amorphous Alq3 derivatives.

5p kethamoi1 17-11-2019 11 1   Download

White light emitting diodes (WLEDs) were made by coating organic and inorganic hybrid composites on blue LED chips. Y3Al5O12:Ce (YAG:Ce) nano powder prepared by lowtemperature Sol-Gel method exhibited a broadband green emission spectrum with the peak at 521 nm.

7p thuyliebe 12-10-2018 16 0   Download

The ultra-thin nanocomposite films based on the nano-crystal TiO2 (TiO2-nc) or multi-walled carbon nanotube (MWCNTs) were prepared and used as the buffer layers in the fabrication of the organic light-emitting diodes (OLEDs). The injection efficiency of the hole and electron was improved by inserting an ultra-thin buffer layer between the electrodes and emissive layer.

6p thuyliebe 09-10-2018 33 0   Download

Bài thuyết trình Giới thiệu về OLED (Organic Light - Emitting Diode) bao gồm những nội dung về công nghệ OLED, thành phần cấu tạo và công đoạn chế tạo 1 tế bào OLED, cơ chế phát sáng của OLED, một số loại OLED và ứng dụng thực tế, ưu và nhược điểm của OLED.

28p maiyeumaiyeu10 17-09-2016 227 31   Download

Bài giảng Giới thiệu về OLED (Organic Light – Emitting Diode) nêu lên tổng quann về công nghệ OLED; thành phần cấu tạo và công đoạn chế tạo một tế bào OLED; cơ chế phát sáng của OLED; một số loại OLED và ứng dụng thực tế; ưu và nhược điểm của OLED.

28p cocacola_05 02-11-2015 95 11   Download

This book describes the state-of-the-art advancement in the field of organic electroluminescence contributed by many researchers with internationally established expertise in the field. It includes original contributions on the synthesis of suitable organic materials, fabrication of organic light emitting devices (OLEDs) and organic white light emitting devices (WOLEDs), characterization of these devices and some designs for optimal performance.

242p camchuong_1 04-12-2012 75 16   Download

Organic light emitting diodes (OLEDs) have attracted enormous attention in the recent years because of their potential for flat panel displays and solid state lighting. This potential lies in the amazing flexibility offered by the synthesis of new organic compounds and by low-cost fabrication techniques, making these devices very promising for the market.

232p cucdai_1 22-10-2012 98 15   Download