LIGHT EMITTING DIODES

index, high contrast, and wide viewing angle. OLEDs have emerged as strong candidates for next-generation flat panel displays and solid-state lighting sources [3-6]. Many progresses have been made in improving the performance of OLEDs, including high power efficiency tandem organic light-e[r]

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centers and microstructural evaluation by XPS and Raman in ZnO thinfilms annealed in vacuum, N2 and O2. Physica B 2007, 388:145-152.20. Lin B, Fu Z, Jia Y: Green luminescent center in undoped zinc oxide filmsdeposited on silicon substrates. Appl Phys Lett 2001, 79:943-945.21. Quang LH, Chua SJ, Ping[r]

42. Kim BH, Cho CH, Mun JS, Kwon MK, Park TY, Kim JS, Byeon CC, Lee J,Park SJ: Enhancement of the external quantum efficiency of a siliconquantum dot light-emitting diode by localized surface plasmons. AdvMater 2008, 20:3100.43.Yeh DM, Chen CY, Lu YC, Huang CF, Yang CC: Formation of va[r]

Normally an organic and inorganic composite structure is used in OLEDencapsulation. The quality of encapsulation depends on the materials, surface topographyand the adhesion between the organic and inorganic layers. This thesis focuses on issuesin encapsulating organic light-emitting <[r]

This Provisional PDF corresponds to the article as it appeared upon acceptance. Fully formattedPDF and full text (HTML) versions will be made available soon.Influence of helium-ion bombardment on the optical properties of ZnOnanorods/p-GaN light emitting diodesNanoscale Research Letter[r]

This Provisional PDF corresponds to the article as it appeared upon acceptance. Fully formattedPDF and full text (HTML) versions will be made available soon.Influence of helium-ion bombardment on the optical properties of ZnOnanorods/p-GaN light emitting diodesNanoscale Research Letter[r]

devices.Recently, efforts have been focused on improvement ofelectrical conductivity of PEDOT:PSS films. Electricalconductivity of PEDOT:PSS can be enhanced by acidicand thermal treatments. Improvement was achieved byadding small amount of solvents with high boiling tem-perature such as dimethyl form[r]

made by an electrospray process were compared with spin-coated ones. The PLED device fabricated by the electrospray process showed maximum current efficiency of 24 cd/A, which was comparable with that of the spin-coating process. The electrospray process required a higher concentration of hole and e[r]

of triplet-triplet annihilation which occurs within each EML. It also shows a reduction in the turn-on voltage from 3.5 V (reference device) to 2.5 V by the bipolar property of the CCLs. Background Due to their high efficiency, phosphorescent organic light-emitting diodes [PHO[r]

Carrier Transport and Recombination Dynamics in Disordered Organic Light Emitting Diodes 95Shih-Wei Feng and Hsiang-Chen WangSolution Processable Ionic p-i-n Organic Light- Emitting Diodes 105Byoungchoo ParkHigh-Contrast OLEDs with High-Efficiency 125Daniel P[r]

cycloalkenyl-pyridine ligands as highly efficient emitters for organic light emitting diodes. Advanced Materials, Vol. 20, pp. 2003-2007. Kim, S. H.; Jang, J. &amp; Lee, J. Y. (2007). High efficiency phosphorescent organic light-emitting diodes using car[r]

nanostructured TiO2 layers were grown by thermal annealing, then they were spin-coated by MEH-PPV films. Study of PL spectra of pure MEH-PPV and MEHPPV-PON films has shown that with excitation by a 331.1 nm wavelength laser lead to the largest enhancement in photoluminescent intensity as observed in[r]

also given a boost to the already expanding field of OLEDs. The new discovery of polymer light emitting diodes(PLEDs) have shown that even solution grown thin layers of a conjugated polymer can be used as an emitter material which has given new device concepts like ink jet print[r]

negative ions for the p-doped region) can bend the heights of the lowest unoccupied molecular orbital (LUMO) level and the highest occupied molecular orbital (HOMO) level of the organic molecules near the electrodes. Thus, the electrons and holes can be injected easily into the organic layer through[r]

Light Emitting Diodes Fuh-Shyang Juang, Yu-Sheng Tsai, Shun-Hsi Wang, Shin-Yuan Su, Shin-Liang Chen and Shen-Yaur Chen National Formosa University Taiwan 1. Introduction The organic light emitting diodes (OLEDs) [1] is a new-generation flat panel display w[r]

open-circuit voltage was superior to previously reported values for metal/GaN Schottky photo-detectors. A characteristic frequency-dependent behaviour of the interface capacitance was found for the TCP/epi GaN solar cells. The C-f characteristics were analyzed based on the dielectric dispersion theo[r]

electrodeposited ZnO NRs on F-doped SnO2glass sub-strate acting as a cathode and applying PEDOT:PSS as ap-type contact [9]. Although the device demonstratedrational LED characteristics, it has a drawback regardingstability [9]. White light–emitting diodes based on organic/ZnO NR[r]

Chapter 6 Organic Light Emitting Diodes Based on Novel Zn and Al Complexes 161 Petia Klimentova Petrova, Reni Lyubomirova Tomova and Rumiana Toteva Stoycheva-Topalova Part 2 OLED Processes and Devices 193 Chapter 7 Unconventional, Laser Based OLED Material Direct Patterning and[r]

with dye doped polymer (3:PVK AlQ) were fabricated by spin casting techniques and characterized. The results validate the model for the single layer devices and its suitability for complex devices is yet to be tested. The model is having the advantages of incorporating charged traps as shown in equa[r]

much better performance yielding a maximum external quantum efficiency of ca. 3.3% at 6.5 V. The maximum luminance efficiency achieved was 2.7 cd/A at a current density of 5.25 mA/cm2 (6.5) with a maximum luminance of 4730 cd/m2 with CIE of (0.14, 0.09). Thus, the maximum external efficiency achieve[r]