Evolution of dark spots in organic light emitting devices

... i.e inorganic and organic electroluminescent devices 1.2.4.1 Inorganic Light Emitting Devices There are two types of inorganic electroluminescence devices In the first type, light is produced ... Displays 1.2.4 Electroluminescent (EL) Displays 1.2.4.1 Inorganic Light Emitting Devices 1.2.4.2 Organic Light Emitting Devices (OLEDs) 1.3 Development of OLEDs 11 i...

Ngày tải lên: 12/09/2015, 10:58

... 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-c...

Ngày tải lên: 05/10/2015, 21:22

... the glass temperature of polymer materials can enhance the crystallization in the thin film and improve the morphology of the polymer film Conclusions In summary, polymer light- emitting devices based ... The peak positions of the wavelength light emitted from the PLED before annealing are 525 nm (P1) and 560 (P2) Both peak positions of the wavelength of light emitted bec...

Ngày tải lên: 22/06/2014, 01:20

... 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...

Ngày tải lên: 20/06/2014, 23:20

... 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 u...

Ngày tải lên: 20/06/2014, 23:20

... 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 volt...

Ngày tải lên: 22/06/2014, 00:20

... 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 Conclus...

Ngày tải lên: 11/09/2015, 10:17

... influence of surface properties of indium tin oxide (ITO) on hole injection and thus on the performance of OLEDs is presented After that, recent developments on ITO surface modifications are reviewed ... fundamentally distinct from conventional inorganic semiconductor-based light- emitting diodes (LEDs) The rectification and light- emitting properties...

Ngày tải lên: 14/09/2015, 08:24

... represented by the present value of the expected future purchases of the new customers (or the expected increase in the purchases of the old customers) Similarly, the loss of customers will show ... goods in a way which is relevant for empirical analysis and consumer policy Towards a theory of credence goods The starting point of a theory of credence...

Ngày tải lên: 23/03/2014, 10:20

... 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′-diph...

Ngày tải lên: 06/05/2014, 08:55

... 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 con...

Ngày tải lên: 18/06/2014, 22:20

... TACATCGGCCTTTGAGTCGC ATGG CTTATTAACGCCTATATAAAC ACC KSGGGTCGACGTCATCAATGA CGTTRTAC AARGAATTCATKGGGGCCCA RARRGACTGGC GTGACGAAGATTGCATTCT AATAGTATTGTCATAGAAG TAAGAAGATGGTGGGAATCC CGATCAGTATTGTTCTGGAAC TGGTGGGAATCCCACCTT ... (EACMV), East African cassava mosaic Cameroon virus (EACMCV), East African cassava mosaic Malawi virus (EACMMV), East African cassava mosaic Zanzibar virus (EACM...

Ngày tải lên: 18/06/2014, 22:20

... 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 Emitt...

Ngày tải lên: 19/06/2014, 21:20

... 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 OC1...

Ngày tải lên: 19/06/2014, 21:20