toward efficient organic light emitting diodes

... 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 become ... VanSlyke SA: Organic electroluminescent diodes Appl Phys Lett 1987, 51:913 Tatsuo M, Takaaki I, Teruyoshi Mizutani J: Electroluminescent properties of organic light- emitting diodes with blue -emitting ... tandem organic light- emitting diodes based on bulk heterojunction organic bipolar charge generation layer Appl Phys Lett 2011, 98:243309 D'Andrade BW, Forrest SR: White organic light- emitting devices...

Ngày tải lên: 06/05/2014, 08:55

... Due to their high efficiency, phosphorescent organic light- emitting diodes [PHOLEDs] are promising light- emitting materials in organic light- emitting diodes [OLEDs] An internal quantum efficiency ... 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 ... well structures in organic light- emitting devices Appl Phys Lett 2009, 95:103303 10 Kim SH, Jang J, Hong JM, Lee JY: High efficiency phosphorescent organic light emitting diodes using triplet...

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 ... Keywords: 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 ... printing of doped polymers for organic light emitting devices Pardo DA, Jabbour GE, Peyghambarian N: Application of screen printing in the fabrication of organic light- emitting devices Adv Mater...

Ngày tải lên: 20/06/2014, 23:20

... spectroscopy (XPS) Flexible PEDOT:PSS anodes were fabricated to replace ITO in flexible organic lightemitting diodes (FOLED) FOLEDs based on the modified PEDOT:PSS anodes have a comparable performance ... 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...

Ngày tải lên: 22/06/2014, 00:20

... 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 between the anode ... 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 ... and high efficient blue light emission (Figure 1.9) However, compared with other color light emission, the efficiency of blue EL materials are still low Thus, highly efficient blue light- emitting...

Ngày tải lên: 10/09/2015, 15:54

... highlights some of the materials that have drawn considerable attention 2.3.1 Conjugated Small Organic Molecules As mentioned before, inspired by the search for light- emitting devices based on organic ... composition to tune their properties through chemical means Due to the promising attributes of organic light- emitting diodes (OLED) for applications in flat panel displays, research and development efforts ... in the form of a photon of light This phenomenon is called electroluminescence Step OLED devices emit visible light Step The color of the light depends on the type of organic molecule in the emissive...

Ngày tải lên: 11/09/2015, 10:17

... an organic and inorganic composite structure is used in OLED encapsulation The quality of encapsulation depends on the materials, surface topography and the adhesion between the organic and inorganic ... 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, the surface ... as 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...

Ngày tải lên: 05/10/2015, 21:22

... in growth, light emitting diodes and lasers Nanotechnology 2009, 20:332001 [4] Wang ZL: Nanostructures of zinc oxide Materials Today 2004, 7:26–33 [5] Klingshirn C: ZnO: from basics towards applications ... array-based light emitting diodes Nano Research 2008, 1:123–128 [8] Alivov Ya.I, Van Nostrand JE, Look DC, Chukichev MV, Ataev BM: Observation of 430 nm electroluminescence from ZnO/GaN heterojunction light- emitting ... footprint and large surface area to volume ratio are good candidates for heterojunction light- emitting diodes (LEDs) as compared to thin films This is due to the fact that the stress/strain due...

Ngày tải lên: 18/06/2014, 22:20

... Photophysical Properties of Pyrene-Based Multiply Conjugated Shaped Light- Emitting Architectures: Toward Efficient Organic- Light- Emitting Diodes 21 Jian-Yong Hu and Takehiko Yamato Chapter Organometallic ... Films 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 ... Taniguchi Chapter 12 Effect of High Magnetic Field on Organic Light Emitting Diodes 311 Toshihiro Shimada 275 Preface Organic light- emitting diodes (OLED) are playing a major role in information...

Ngày tải lên: 19/06/2014, 21:20

... 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 ... fluorene-based light- emitting monomers (27-33) Synthesis and Photophysical Properties of Pyrene-Based Multiply Conjugated Shaped Light- Emitting Architectures: Toward Efficient Organic- Light- Emitting Diodes ... hybrids light- emitting monomers (34-39) 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 ... Photophysical Properties of Pyrene-Based Multiply Conjugated Shaped Light- Emitting Architectures: Toward Efficient Organic- Light- Emitting Diodes 47 oligomers with fewer fluorene units It was well known...

Ngày tải lên: 19/06/2014, 21:20

... (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 OLEDs These dendrimers have been ... from triplet states of organic chromophores has very low rate constant and cannot compete with non-radiative quenching at room temperature Consequently, it 70 Organic Light Emitting Diode – Material, ... affords to foresee new structure-property relations that can guide an improved design of organic light- emitting diodes based on phosphorescence Modern density functional theory (DFT) permits to calculate...

Ngày tải lên: 19/06/2014, 21:20

... White organic light- emitting devices using a phosphorescent sensitizer Applied Physics Letters, Vol 82, pp 4224-4226 Chou, P.T & Chi, Y (2007) Phosphorescent dyes for organic light- emitting diodes ... Efficiency Red Phosphorescent Organic Light- Emitting Diodes with Simple Structure 103 Phosphorescent OLED devices In recent years, phosphorescent organic light- emitting devices (PHOLEDs) are ... blocking layer, ETL: electron transport layer) In this chapter, we discuss efficient red phosphorescent organic light- emitting diodes implemented using multiple quantum well structure, two layers,...

Ngày tải lên: 19/06/2014, 21:20

... which is four High Efficiency Red Phosphorescent Organic Light- Emitting Diodes with Simple Structure 125 times that of fluorescent organic light- emitting devices (OLEDs) (Gong et al., 2002; Tsuzuki ... (2004) Efficient organic electrophosphorescent white -light- emitting device with a triple doped emissive layer, Adv Mater 16: 624-628 D’Andrade, B W & Forrest, S R (2004) White organic light- emitting ... Forrest, S R (1999) Very high-efficiency green organic light- emitting devices based on electrophosphorescence, Appl Phys Lett 75: 4-6 140 Organic Light Emitting Diode – Material, Process and Devices...

Ngày tải lên: 19/06/2014, 21:20

... for highly efficient, long-life organic light- emitting diodes, Chemistry – An Asian Journal 4: 742753 Lee, J.-H., Lin, T.-C., Liao, C.-C & Yang, F H (2005) Study on organic light- emitting device ... Efficiency Red Phosphorescent Organic Light- Emitting Diodes with Simple Structure 145 Tse, S C., Tsung, K K & So, S K (2007) Single-layer organic light- emitting diodes using naphthyl diamine, ... mixed-layer organic light- emitting diodes, Appl Phys Lett 91: 142106-1 – 142106-3 Meyer, J., Hamwi, S., Bülow, T., Johannes, H.-H., Riedl, T & Kowalsky, W (2007) Highly efficient simplified organic light...

Ngày tải lên: 19/06/2014, 21:20

... small-molecular organic light- emitting diodes with a polytetrafluoroethylene barrier, Appl Phys Lett., Vol 82, No 2, pp 155-158, ISSN: 0021-8979 Guo F.and Ma D (2005), White organic light- emitting diodes ... Introduction to Organic Light- Emitting Materials and Devices, Fudan University Press, Shanghai Im H., Choo D., Kim T., Kim J., Seo J., and Kim Y (2007), Highly efficient organic lightemitting diodes fabricated ... for the organic light- emitting diodes, J Organometallic Chemistry, Vol 691, No 12, pp 2701- 2707, ISSN: 0022-328X Lu H and Yokoyama M (2003), Enhanced emission in organic light- emitting diodes...

Ngày tải lên: 19/06/2014, 21:20

... mobility for organic lightemitting diodes, Appl Phys Let., Vol 92, No 10, 103305, ISSN: 0021-8979 Xu X., Yu G., Liu Y.,and Zhu D (2006), Electrode modification in organic light- emitting diodes, Displays, ... 214-218, ISSN: 0254-0584 Wu J., Hou J., Cheng Y, Xie Z., and Wang L (2007), Efficient top -emitting organic lightemitting diodes with a V2O5 modified silver anode, Semicond Sci Technol., Vol 22, ... buffer-layer in organic light- emitting diodes, Applied Surface Science, Vol 252, No 6, pp 2355-2359, ISSN: 0169-4332 Wei X., Yang G, Cheng J., Lu Z., and Xie M (2007), Synthesis of novel light emitting...

Ngày tải lên: 19/06/2014, 21:20

... color indicating a smooth surface and giving an efficient light output of 83 cd/A for a green OLED and 37 cd/A for a red OLED 230 Organic Light Emitting Diode – Material, Process and Devices ... T Thermal stability of organic thin-film transistors with self-assembled monolayers dielectrics, Appl Phys Lett., Vol 96, pp 053302-1 – 053302-3 (2010) 232 Organic Light Emitting Diode – Material, ... layers up to 200 nm are possible with this approach Interlayer Processing for Active Matrix Organic Light Emitting Diode (OLED) Displays 219 Patterning of parylene is done by photolithography using...

Ngày tải lên: 19/06/2014, 21:20

... that the intensity of ZnO(002) peak for the TZO films by the RFS system slightly increased with increasing 250 Organic Light Emitting Diode – Material, Process and Devices deposition thickness On ... Organic Light Emitting Diode – Material, Process and Devices Fig 23 Selection principle for exclusive measurement of surface-parallel lattice planes in a θ/2θ scan 2.6 Novel materials 2.6.1 Organic ... suggested that thermal deposited organic thin films have the general flexibility property by the van der waals force between aromatic atoms-to-atoms.(Zhang 264 Organic Light Emitting Diode – Material,...

Ngày tải lên: 19/06/2014, 21:20

... Micro-Cavity in Organic Light- Emitting Diode Young-Gu Ju Department of Physics Education, Kyungpook National University Korea Introduction The study on micro-cavity in organic light- emitting diode(OLED) ... MEH-PPV Light- Emitting Diodes Fabricated on The Flexible Substrate Synthetic Metals, Vol.130, No.1, (August 2002), pp 55-60, ISSN 0379-6779 Transparent Conductive Oxide (TCO) Films for Organic Light ... Qadri, S.B & Kafafi, Z.H (2003) Anode Material Based on Zr-Doped ZnO Thin Films for Organic Light- Emitting Diodes Applied Physics Letters, Vol.83, No.18, (September 2003), pp 3809-3811, ISSN...

Ngày tải lên: 19/06/2014, 21:20