optical sources light emitting diodes and laser technology

... presentations and Awards 143 iv Summary Design and fabrication of polarized InGaN light- emitting diodes and THz polarizer based on subwavelength metallic nanogratings InGaN light emitting diodes ... Historical and state-of-the art light- emitting diode .1 1.1.2 Polarization of light 1.1.3 Polarization elements 1.1.4 Polarization of various light sources 1.2 Motivation and ... Historical and state-of-the art light- emitting diode Perhaps one of the most widely used technologies is the light emitting diode (LED), which is applied in an extremely broad range of markets and applications...

Ngày tải lên: 10/09/2015, 15:53

... helium-ion bombardment on the optical properties of ZnO nanorods/p-GaN light- emitting diodes N H Alvi*1, S Hussain1, J Jensen2, O Nur1, and M Willander1 Department of Science and Technology (ITN), Campus ... semiconducting and piezoelectric properties and in addition it is biocompatible and bio-safe ZnO possesses deep level emission (DLE) bands emitting all the colors in the visible region and has good ... Dang D: Zinc oxide nanorod based photonic devices: recent progress in growth, light emitting diodes and lasers Nanotechnology 2009, 20:332001 [4] Wang ZL: Nanostructures of zinc oxide Materials...

Ngày tải lên: 18/06/2014, 22:20

... helium-ion bombardment on the optical properties of ZnO nanorods/p-GaN light- emitting diodes N H Alvi*1, S Hussain1, J Jensen2, O Nur1, and M Willander1 Department of Science and Technology (ITN), Campus ... semiconducting and piezoelectric properties and in addition it is biocompatible and bio-safe ZnO possesses deep level emission (DLE) bands emitting all the colors in the visible region and has good ... Dang D: Zinc oxide nanorod based photonic devices: recent progress in growth, light emitting diodes and lasers Nanotechnology 2009, 20:332001 [4] Wang ZL: Nanostructures of zinc oxide Materials...

Ngày tải lên: 20/06/2014, 04:20

... Alq3, TPD and PPV 1.1 Mechanism and structure of organic light- emitting diodes (OLEDs) Electroluminescence is obtained from light- emitting diodes (LEDs) when incorporating the light- emitting layer ... flat-panel-display and biolabeling technologies The focuses of this project are the design and synthesis of phosphorescent small molecules and polymers for organic light- emitting diodes (OLEDs) and fluorescent ... Phosphorescent materials for OLEDs Chapter 1.1 Introduction Mechanism and structures of organic light- emitting diodes (OLEDs) Light- emitting materials for OLEDs 1.2.1 Fluorescent materials 1.2.2 Phosphorescent...

Ngày tải lên: 10/09/2015, 15:54

... drop-on-demand (DoD) inkjet printing technology in the fabrication of organic light- emitting diode (OLED) devices Three areas of work related to OLED and inkjet printing were performed and addressed ... collection and analysis A.3 XIX Chapter Introduction CHAPTER INTRODUCTION 1.1 Background Using organic materials for light- emitting diodes (LED) is fascinating due to their vast variety and the ... fabricated by means of drop-on-demand inkjet printing technology and to compare with spin-coated OLED devices (3) To investigate and characterize drop-on-demand inkjet printed droplet features...

Ngày tải lên: 11/09/2015, 10:17

... which is known as Polymer Light Emitting Diodes (PLEDs) The conjugated polymer light- emitting materials came to be known as Light Emitting Polymer (LEP) Although this technology lags SMOLED development ... type of diodes is Polymer Light- Emitting Diode (PLED) and the material used is known as Light- Emitting Polymer (LEP) DoD-IJP seems to hold the solution for all the tediousness, difficulties and wastage ... devices and nanostructure materials deposition etc An Organic Light Emitting Diode (OLED) is a light- emitting diode (LED) in which the light- emitting layer is an organic compound These devices promise...

Ngày tải lên: 04/10/2015, 17:04

... thickness offered by MBE and MOCVD The complexity and relatively poorer understanding of the MBE and MOCVD systems result in longer setup time and downtime for maintenance and troubleshooting compared ... were then poorly controlled, and the emission processes were not well understood For example, the first reports on light emitting diodes (LEDs) [Round] were based on light emission from particles ... members who are understanding and supported me through many late nights and “burnt” weekends ii LPE GROWTH AND FABRICATION OF GAP GREEN LEDS LIQUID PHASE EPITAXIAL GROWTH AND FABRICATION OF GALLIUM...

Ngày tải lên: 10/11/2015, 11:00

... achieved at 3.5 V Keywords Blue organic light- emitting diodes; HOMO-LUMO; QWS Background Since the report by Tang and VanSlyke on organic light- emitting diodes (OLEDs), [1,2] OLEDs have become ... organic light- emitting diodes with blue -emitting Alq Photopolym Sci Technol 2004, 17:2 Reineke S, Lindner F, Schwartz G, Seidler N, Walzer K, Lüssem B, Leo K: White organic light- emitting diodes ... of organic light- emitting diodes Acta Phys Sin 2010, 59:8093 23 Jian Z, Juan G, Zhuo G, Ke D, Jiule C: An organic light- emitting device with ultrathin quantum-well structure as light emitting layer...

Ngày tải lên: 06/05/2014, 08:55

... organic light- emitting diodes [PHOLEDs] are promising light- emitting materials in organic light- emitting diodes [OLEDs] An internal quantum efficiency of 100% could be realized in red and green ... layer structures on phosphorescent blue organic light- emitting diodes Synth Met 2009, 159:1460-1463 Qui Y, Gao Y, Wei P, Wang L: Organic light- emitting diodes with improved holeelectron balance by ... light- emitting diodes with Ir-based emitters Phys Rev 2007, 75:125328 Figure Material and device structures (a) The chemical structures of FIrpic, mCP, and TPBi materials (b) The structures and...

Ngày tải lên: 20/06/2014, 23:20

... polymer light- emitting diodes by blade coating method Appl Phys Lett 2008, 93:153308-153303 Kopola P, Tuomikoski M, Suhonen R, Maaninen A: Gravure printed organic light emitting diodes for lighting ... organic light- emitting diodes; electrospray, polymer, conformation Introduction During the last two decades, intense academic and industrial research has been devoted on organic light- emitting ... mixture of CB and DCB and non-aromatic solvents, chloroform [CF] and 1,2-dichloroethane [DCE] The mixture of CB and DCB was selected as it was optimum for our device structure and process The...

Ngày tải lên: 20/06/2014, 23:20

... solid-state light sources (top row); in order to get considerable enhancement, the extinction band of LSP must be close to the band-gap emission energy of the LED (middle row); and this new technology ... quantum well light emitting diodes J Appl Phys 2008, 104:093107 10 Sun QJ, Subramanyam G, Dai LM, Check M, Cambell A, Naik R, Grote J, Wang YQ: Highly efficient quantum-dot light- emitting diodes with ... general lighting, flat panel displays, and optoelectronic chips General lighting Advantages such as energy saving, low radiation, shock resistance, and spectral power tunability over fluorescent and...

Ngày tải lên: 21/06/2014, 05:20

... Dang D: Zinc oxide nanorod based photonic devices: recent progress in growth, light emitting diodes and lasers Nanotechnology 2009, 20:332001 Wang ZL: Nanostructures of zinc oxide Mater Today ... nanowire array-based light emitting diodes Nano Res 2008, 1:123-128 24 Yuen C, Yu SF, Lau SP, Rusli , Chen TP: Fabrication of n-ZnO:Al/p-SiC(4H) heterojunction light- emitting diodes by filtered ... scattering of light, thus enhancing light emission and extraction efficiency [23] The GaN has close lattice mismatch with ZnO, and the close lattice match is the main factor that can influence the optical...

Ngày tải lên: 21/06/2014, 05:20

... Fabrication and Characterization of FOLEDs Double layer FOLEDs with a hole transport layer of TPD and emitting/ electron transport layer of Alq3 film sandwiched between DMSO modified PEDOT:PSS anode and ... PEDOT and PSS may be even weak Molecules of the solvent may diffuse into the PEDOT:PSS particles, and molecule chains between PEDOT and PSS The bonding of PEDOT and PSS particle is released and ... electron microscopy (FESEM), and X-ray photoelectron spectroscopy (XPS) Flexible PEDOT:PSS anodes were fabricated to replace ITO in flexible organic lightemitting diodes (FOLED) FOLEDs based on...

Ngày tải lên: 22/06/2014, 00:20

... p-doping concenas the group-III sources; phosphine (PH3 and arsine tration These data indicate that the Mg doping level in (AsH3 were the group -sources, and disilane (Si2 H6 and the “b” zone is not significantly ... AlGaInP-Based Light Emitting Diodes M Eichfelder, W M Schulz, M Reischle, M Wiesner, R Ro bach, M Jetter, and P Michler, Appl, Phys Lett 95, 131107 (2009) H S Oh, S M Kim, J H Joo, J H Baek, and J S ... Publishers display applications, we studied the electrical and optical behaviors of device performances Figure (a) Forward I–V characteristics and (b) light output power of according to their Mg doping...

Ngày tải lên: 31/07/2015, 18:48

... electrons and holes injected from the cathode and anode respectively, recombine in the organic light- emitting layer hν Figure 1.1 OLED structure showing injection of electrons from the cathode and ... substrate, and associated changes in electrical, optical properties and morphology in the device are thus investigated in this thesis Understanding the relationship between the surface roughness and ... important to understand how oxygen and humidity penetrates the encapsulation layer and react with the organic film and cathode layers Firstly techniques important to OLED fabrication and encapsulation...

Ngày tải lên: 05/10/2015, 21:22

... Conjugated Shaped Light- Emitting Architectures: Toward Efficient Organic -Light- Emitting Diodes 21 Jian-Yong Hu and Takehiko Yamato Chapter Organometallic Materials for Electroluminescent and Photovoltaic ... Interactive Optical Communication 291 Takeshi Fukuda and Yoshio Taniguchi Chapter 12 Effect of High Magnetic Field on Organic Light Emitting Diodes 311 Toshihiro Shimada 275 Preface Organic light- emitting ... 5, and (b) Iridium polymers and and platinum polymer were irradiated at 462 and 433 nm, respectively (metallopolymers 5, were 0.05 g/L and metallopolymers were 0.5 g/L) Synthesis, and Photo- and...

Ngày tải lên: 19/06/2014, 21:20

... pyrene-based light- emitting monomers; (2) Functionalized pyrene-based lightemitting dendrimers; and (3) Functionalized pyrene-based light- emitting oligomers and polymers Functionalized pyrene-based light- emitting ... Multiply Conjugated Shaped Light- Emitting Architectures: Toward Efficient Organic -Light- Emitting Diodes 23 3.1 Pyrene-cored organic light- emitting monomers Although pyrene and its derivatives have ... benzene-cored light- emitting monomers (21-26) Synthesis and Photophysical Properties of Pyrene-Based Multiply Conjugated Shaped Light- Emitting Architectures: Toward Efficient Organic -Light- Emitting Diodes...

Ngày tải lên: 19/06/2014, 21:20

... pyrene-cored light emitting dendrimers (51) Synthesis and Photophysical Properties of Pyrene-Based Multiply Conjugated Shaped Light- Emitting Architectures: Toward Efficient Organic -Light- Emitting Diodes ... pyrene-based light- emitting polymers (66-69 and 70-75) 75 Synthesis and Photophysical Properties of Pyrene-Based Multiply Conjugated Shaped Light- Emitting Architectures: Toward Efficient Organic -Light- Emitting ... 0.35-0.74 in CHCl3 and 0.44-0.79 Synthesis and Photophysical Properties of Pyrene-Based Multiply Conjugated Shaped Light- Emitting Architectures: Toward Efficient Organic -Light- Emitting Diodes 45 in...

Ngày tải lên: 19/06/2014, 21:20

... form of dyad (PM-1) and pentamer (PM-2), have been sensitized and found to serve as good 84 Organic Light Emitting Diode – Material, Process and Devices candidates of red -light emitting materials ... complex with pip ligands is mixed Ir-d, phenyl-π and pip-π in character The pip ligand is able to shift the emission wavelengths into the blue region and the polymer light- emitting devices (PLEDs) ... with polypyridyl ligands was developed a long time ago in the framework of crystal field theory and ligand field theory 76 Organic Light Emitting Diode – Material, Process and Devices using quasi-octahedral...

Ngày tải lên: 19/06/2014, 21:20

... backlighting, and candidates for the next generation lighting (Destruel et al., 1999; D’Andrade and Forrest, 2004), owing to wide viewing angle, low driving voltage, thin, light- weight, and possibly ... review we have discussed the understanding and design of optimal organometallic chromophores for light- emitting layers in OLEDs and for light- absorbing dyes and charge separation in DSSC interfaces ... Tsuzuki and Tokito, 2008; Mi et al., 2009; T.-C Lee et al., 2009; Pode et al., 2010; K.K Kim et al., 2010; Tsujimoto et al., 2010) The wide band gap host and narrow band gap (Eg) 104 Organic Light Emitting...

Ngày tải lên: 19/06/2014, 21:20