Luminescent materials for organic light emitting diodes (OLEDs) and bioimaging

... 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 ... 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 ... LUMINESCENT MATERIALS FOR ORGANIC LIGHT- EMITTING DIODES (OLEDS) AND BIOIMAGING YAO JUN HONG A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF SCIENCE DEPARTMENT...

Báo cáo hóa học: " Electrospray deposition of polymer thin films for organic light-emitting diodes" pot

... Electrospray deposition of polymer thin films for organic light-emitting diodes Wontae Hwang1, Guoqing Xin1, Minjun Cho1, Sung Min Cho1, and Heeyeop Chae*2 School of Chemical Engineering, ... Abstract Electrospray process was developed for organic layer deposition onto polymer organic light-emitting diode [PLED] devices in this work An electrospray can be used to produce nanometer-scale thin ... applicability of the electrospray process to organic thin films in OLEDs was demonstrated in small-scale devices [12] In this work, we demonstrated nanoscale-thick organic thin films using the electrospray...

Báo cáo hóa học: " Modiﬁcation of Conductive Polymer for Polymeric Anodes of Flexible Organic Light-Emitting Diodes" pdf

... a C(1s), O(1s) spectra at normal take-off angle of 458, b S(2p) spectra at normal take-off angle of 458, and c S(2p) spectra at a smaller take-off angle of 25° 123 400 Luminous intensity (µW/cm2) ... in conductivity was achieved with the modiﬁcation process Based on the modiﬁed polymeric anodes, FOLEDs were fabricated and compared with the FOLEDs of ITO anodes A lower turn voltage and higher ... alcohol, each for 10 min, respectively The substrates were then dried in a vacuum oven for 12 h at 60 °C At last, the substrates were treated by mild O2 plasma for Modiﬁcation of PEDOT:PSS DMSO,...

highly efficient blue organic light emitting diodes using quantum well like

... Highly efficient blue organic light- emitting diodes using quantum well- like multiple emissive layer structure Ju-An Yoon1 Email: jjuan25@naver.com ... Abstract In this study, the properties of blue organic light- emitting diodes (OLEDs), employing quantum well- like structure (QWS) that includes four different blue emissive materials of 4,4′-bis(2,2′-diphenylyinyl)-1,1′-biphenyl ... cd/A was 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...

Báo cáo hóa học: " Effect of triplet multiple quantum well structures on the performance of blue phosphorescent organic light emitting diodes" potx

... Effect of triplet multiple quantum well structures on the performance of blue phosphorescent organic light- emitting diodes Seokjae Lee†1, Jaryong Koo†1, Gunwoo Hyung†1, Donghwan Lim1, Donghyung ... the other devices due to a relatively narrow emissive region Conclusions In conclusion, the present study reports on the high efficiency blue PHOLEDs based on a carrier and triplet exciton confinement ... rate of 10 Å/s The deposition rates were controlled with a quartz crystal monitor, and the doping concentrations of the emitters were optimized After the organic and metal depositions, the devices...

Study of drop on demand inkjet printing technology with application to organic light emitting diodes

... Inkjet Printing Drop Ejection Parameters A.1 VI Summary SUMMARY This thesis aims to further investigate the application of drop- on- demand (DoD) inkjet printing technology in the fabrication of ... Discussion 118 4.3.1 ITO Surface Patterning 118 4.3.2 Drop- on- Demand Inkjet Printing of PEDOT:PSS 119 4.3.3 Characterization of P-OLED Devices 127 4.4 Conclusion 135 CHAPTER CHARACTERIZATION OF SINGLE ... drying behavior of inkjet printed conductive polymer drops Chapter Introduction on the hydrophilic substrate To conduct shape representation and mapping of dried droplet profiles with drying temperature...

Encapsulation issues in organic light emitting diodes

... adhesion between the organic and inorganic layers This thesis focuses on issues in encapsulating organic light- emitting diodes with thin films Other than the quality of the encapsulation film, ... polymer light- emitting display (PLED) materials is their solubility in organic solvents, allowing them to be deposited onto a glass or flexible plastic substrate using spin-coating or ink jet printing ... recombine in the organic light- emitting layer hν Figure 1.1 OLED structure showing injection of electrons from the cathode and holes from the ITO anode, and their recombination in the electroluminescent...

Investigation of Mg doping profile in the pcladding layer for highbrightness AlGaInPbased light emitting diodes.

... having different Mg doping proﬁles in the p-cladding layer The layer As the [Cp2 Mg] /[III] value in the “b” zone was inset in (b) shows the relative increase of brightness for the same LEDs increased ... having different Mg doping proﬁles in the p-cladding layer Table I Detailed Mg doping proﬁles for “a,” “b,” and “c” zones in the p-cladding layer of LED structures Mg Doping proﬁle at p-cladding ... rate of about teristics of LEDs having different Mg doping levels in the 1.5 m/h The multi-quantum well (MQW) structures for “b” zone In addition, the relative increase of Pout (RIP) of emitting...

Báo cáo sinh học: " Influence of helium-ion bombardment on the optical properties of ZnO nanorods/p-GaN light emitting diodes" pot

... applications The 2-MeV ions only have a minor effect on optical properties of the LED devise after irradiation with moderate fluences Conclusion In summary, the influence of He+ ion irradiation on the ... eV) The observation of the band-edge emissions at 380 nm (3.26 eV) are attributed to the first and second longitudinal optical (LO) phonon replica This is consistent with the LO-phonon energy of ... nanostructures [19] The irradiation changes the amount of defects in ZnO nanorods resulting in changes in the optical properties of ZnO The effect of the ion irradiation of complete device, like...

Organic Light Emitting Diode Material Process and Devices Part 1 pot

... Iridium- and Platinum-Containing Polymers 15 0 15 400 (a) 10 11 10 0 (b) 12 13 300 200 50 10 0 500 600 700 Wavelength (nm) 800 500 600 700 Wavelength (nm) 800 Fig 10 PL spectra for (a) 10 , 11 , (b) 12 and ... monomeric analog 14 , whereas the spectra for the platinum polymers 11 and 13 showed a characteristic strong band due to the conjugated 14 Organic Light Emitting Diode – Material, Process and Devices main ... for Organic Light Emissive Devices (OLEDs) 233 Sunyoung Sohn and Hwa-Min Kim Chapter 10 Micro-Cavity in Organic Light- Emitting Diode Young-Gu Ju Chapter 11 Fast-Response Organic Light- Emitting Diode...

Organic Light Emitting Diode Material Process and Devices Part 2 pptx

... et al., 20 07) And thus, emitting and charge-transporting materials with a high ionization potential values such as oxadiazole 30 Organic Light Emitting Diode – Material, Process and Devices (Tokito ... = C10H21 11d:R = (CH2)2O(CH2)2OCH3 11e: R = CH2CH(C2H5)C4H9 rac 11f: R = COC7H15 11g: R = COCH(C3H7) 11h: OR 12a: R = OC8H17 OC8H1 12b: R = OC8H17 OC8H17 OC10H21 O RO OC10H21 OR 10 11 12c: R ... bromination of pyrene (1) X3 2e: X1 = X2 = X3 = X4 = Br 24 Organic Light Emitting Diode – Material, Process and Devices 3.1.1 Alkynyl-functionalized pyrene-cored light- emitting monomers Acetylene has...

Organic Light Emitting Diode Material Process and Devices Part 3 doc

... 42 Organic Light Emitting Diode – Material, Process and Devices (TGA) in N2 at a heating rate of 20 °C/min dendrimers TP1 and TP2 exhibit high glasstransition temperatures (Tg’s) at 142 and 130 ... cyclohexane to 54 Organic Light Emitting Diode – Material, Process and Devices polar DMF caused only a very slight, positive, batnochromic shift in the -* absorption band from 4 13 to 417 nm However, ... (2006) Org Lett., 8, p 2 739 Vollmann, H.; Becker, M.;  Correll, H S (1 937 ) Justus Liebigs Ann Chem., 1, p 531 60 Organic Light Emitting Diode – Material, Process and Devices Wang, L.; Jiang,...

Organic Light Emitting Diode Material Process and Devices Part 4 pdf

... 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 for ... 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 ... 86 Organic Light Emitting Diode – Material, Process and Devices Among all the constituent components in DSSCs (Fig 4) , the sensitizer, being charged with the task of the light absorption and...

Organic Light Emitting Diode Material Process and Devices Part 5 ppt

... for organic light- emitting diodes Chemistry – A European Journal, Vol 13(2) pp 380-3 95 Cundari, T.R & Stevens, W.J (1993) Effective core potential basis sets J Chem Physics, Vol 98, pp 55 55- 556 5 ... of narrow band gap fluorescent material utilizing beryllium complexes as host and ETL for efficient red phosphorescent 106 Organic Light Emitting Diode – Material, Process and Devices devices has ... 112 Organic Light Emitting Diode – Material, Process and Devices Two layers structure 4.1 Introduction Performance and efficiencies of red PHOLEDs devices have been improved in recent days, particularly...

Organic Light Emitting Diode Material Process and Devices Part 6 ppt

... narrow band-gap host and Ir(piq)3 red dopant materials, and 138 Organic Light Emitting Diode – Material, Process and Devices Bepp2 charge control layers (CCL) Triplet energies in fabricated MQW devices ... identical devices but with different dopant concentrations lying between 0.5 and wt%; 128 Organic Light Emitting Diode – Material, Process and Devices and, (3) the quenching of both luminance, and ... Ir(piq)3 red emitting phosphorescent doping instead of Ir(phq)2acac and a Bebq2 host The fabricated devices were: DNTPD 130 Organic Light Emitting Diode – Material, Process and Devices (40nm)...

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