**5. References**


<sup>\*</sup> Corresponding Author

[11] Moller S, Forrest S. R. Improved Light Out-coupling in Organic Light Emitting Diodes Employing Ordered Microlens Arrays. J. Appl. Phys. 2002:91; 3324-3327.

Effect of Photonic Structures in Organic Light-Emitting Diodes

[28] Fujita M, Ishihara K, Ueno T, Asano T, Noda S, Ohata H, Tsuji T, Nakada H, Shimoji N. Optical and Electrical Characteristics of Organic Light-Emitting Diodes with Two-Dimensional Photonic Crystals in Organic/Electrode Layers. Jpn. J. Appl. Phys. 2005;44:

[29] Schnitzer I., Yablonovitch E., Caneau C., Gmitter T. J., Scherer A. 30% External Quantum Efficiency from Surface Textured, Thin‐film Light‐emitting Diodes. Appl.

[30] Lim J, Oh S. S, Kim D. Y, Cho S. H, Kim I. T, Han S. H, Takezoe H. Enhanced Outcoupling Factor of Microcavity Organic Light-emitting Devices with Irregular Microlens

[31] Schubert E. F., Wang Y. H., Cho A. Y., Tu L. W., Zydzik G. J. Resonant Cavity Light‐

[32] Hunt N. E. J., Schubert E. F., Logan R. A., Zydzik G. J. Enhanced Spectral Power Density and Reduced Linewidth at 1.3 m in an InGaAsP Quantum Well Resonant‐cavity Light‐

[33] Jeong S. M., Araoka F., Machida Y., Ishikawa K., Takezoe H., Nishimura S., Suzaki G. Enhancement of Normally Directed Light Outcoupling from Organic Light-emitting Diodes Using Nanoimprinted Low-refractive-index Layer. Appl. Phys. Lett. 2008;92:

[34] Jeong S. M., Ha N. Y., Araoka F., Ishikawa K., Takezoe H. Electrotunable Polarization of Surface-emitting Distributed Feedback Laser with Nematic Liquid Crystals. Appl. Phys.

[35] Jeong S. M, Araoka F, Machida Y, Takanishi Y, Ishikawa K, Takezoe H, Nishimura S, Suzaki G. Enhancement of Light Extraction from Organic Light-emitting Diodes with Two-Dimensional Hexagonally Nanoimprinted Periodic Structures Using Sequential

[36] Koo W. H, Jeong S. M, Araoka F, Ishikawa K, Nishimura S, Toyooka T, Takezoe H. Light Extraction from Organic Light-emitting Diodes Enhanced by Spontaneously

[37] Hubert C., Debuisschert C. F-., Hassiaoui I., Rocha L., Raimond P., Nunzi J.-M. Emission Properties of an Organic Light-emitting Diode Patterned by a Photoinduced

[38] Lawrence J. R., Andrew P., Barnes W. L., Buck M., Turnbull G. A., Samuel I. D. W. Optical Properties of a Light-emitting Polymer Directly Patterned by Soft Lithography.

[39] Jeong S. M, Takanishi Y, Ishikawa K, Nishimura S, Suzaki G, Takezoe H. Sharply Directed Emission in Microcavity Organic Light-emitting Diodes with a Cholesteric

[40] Burrows P. E, Shen Z, Bulovic V, McCarty D. M, Forrest S. R. Relationship Between Electroluminescence and Current Transport in Organic Heterojunction Light‐emitting

[41] Kalinowski J., Electroluminescence in organics. J. Phys. D 1999;32: R179-R250.

3669-3677.

083307.

Lett. 2008;92: 171105.

Phys. Lett. 1993;63: 2174-2176.

Array. Opt. Express 2006;14: 6564-6571.

emitting Diode. Appl. Phys. Lett. 1992;60: 921-923.

emitting Diode. Appl. Phys. Lett. 1992;61: 2287-2289.

Surface Relief Grating. Jpn. J Appl. Phys. 2008;47: 4566-4571.

Autostructuration Process. Appl. Phys. Lett. 2005;87: 191105.

Formed Buckles. Nat. Photonics 2010;4: 222-226.

Liquid Crystal Film. Opt. Comm. 2007;273: 167-172.

Devices. J. Appl. Phys. 1996;79: 7991-8006.

Appl. Phys. Lett. 2002;81: 1955-1957.

– Light Extraction and Polarization Characteristics 101


[28] Fujita M, Ishihara K, Ueno T, Asano T, Noda S, Ohata H, Tsuji T, Nakada H, Shimoji N. Optical and Electrical Characteristics of Organic Light-Emitting Diodes with Two-Dimensional Photonic Crystals in Organic/Electrode Layers. Jpn. J. Appl. Phys. 2005;44: 3669-3677.

100 Organic Light Emitting Devices

2000;76: 1243-1245.

1996;80: 6954-6964.

1868-1870.

3340-3342.

[11] Moller S, Forrest S. R. Improved Light Out-coupling in Organic Light Emitting Diodes

[12] Sun J, Forrest S. R. Organic Light Emitting Devices with Enhanced Outcoupling via Microlenses Fabricated by Imprint Lithography. J. Appl. Phys. 2006;100: 073106. [13] Yamasaki T., Sumioka K., and Tsutsui T. Organic Light-emitting Device with an Ordered Monolayer of Silica Microspheres as a Scattering Medium. Appl. Phys. Lett.

[14] Jordan R. H., Rothberg L. J., Dodabalapur A., and Slusher R. E. Efficiency Enhancement of Microcavity Organic Light Emitting Diodes. Appl. Phys. Lett. 1996;69: 1997-1999. [15] Dirr S, Wiese S, Johannes H, Kowalsky W. Organic Electro- and Photoluminescent

[16] Han S, Huang C, Lu Z. Color Tunable Metal-cavity Organic Light-emitting Diodes with

[17] Lemmer U., Hennig R., Guss W., Ochse A., Pommerehne J., Sander R., Greiner A., Mahrt R. F., Bassler H., Feldmann J., Gobel E. O. Microcavity Effects in a Spin-coated

[18] Dodabalapur A., Rothberg L. J., Miller T. M., and Kwock E. W. Microcavity Effects in

[19] Dodabalapur A, Rothberg L. J, Jordan R. H, Miller T. M, Slusher R. E, Phillips J. M. Physics and Applications of Organic Microcavity Light Emitting Diodes. J. Appl. Phys.

[20] Tsutsui T., Takada N., Saito S., Ogino E. Appl. Phys. Lett. Sharply Directed Emission in Organic Electroluminescent Diodes with an Optical-microcavity Structure. 1994;65:

[21] Matterson B. J, Matterson J, Lupton J. M, Safonov A. F, Salt M. G, Barnes W. L, Samuel I. D. W. Increased Efficiency and Controlled Light Output from a Microstructured Light-

[22] Lupton J. M., Matterson B. J., Samuel I. D. W., Jory M. J., Barnes W. L. Bragg Scattering from Periodically Microstructured Light Emitting Diodes. Appl. Phys. Lett. 2000;77:

[23] Ziebarth J. M, Saafir A. K, Fan S, McGehee M. D. Extracting Light from Polymer Light-Emitting Diodes Using Stamped Bragg Gratings. Adv. Funct. Mater. 2004;14: 451-456. [24] Ziebarth J. M, McGehee M. D. A Theoretical and Experimental Investigation of Light Extraction from Polymer Light-emitting Diodes. J. Appl. Phys. 2005;97: 064502. [25] Hobson P. A, Wasey J. A. E, Sage I, Barnes W. L. The Role of Surface Plasmons in Organic Light-emitting Diodes. IEEE J. Sel. Top. Quantum Electron. 2002;8: 378-386. [26] Ishihara K, Fujita M, Matsubara I, Asano T, Noda S, Ohata H, Hirasawa A. Nakada H., Shimoji N. Organic Light-emitting Diodes with Photonic Crystals on Glass Substrate

Fabricated by Nanoimprint Lithography. Appl. Phys. Lett. 2007;90: 111114.

Corrugated Photonic Crystal Structure. Appl. Phys. Lett. 2004;85: 5769-5771.

[27] Fujita M., Ueno T., Ishihara K., Asano T., Noda S., Ohata H., Tsuji T., Nakada H., and Shimoji N. Reduction of Operating Voltage in Organic Light-emitting Diode by

Employing Ordered Microlens Arrays. J. Appl. Phys. 2002:91; 3324-3327.

Microcavity Devices. Adv. Mater. 1998;10: 167-171.

Polymer Two-layer System. Appl. Phys. Lett. 1995;66: 1301-1303.

Organic Semiconductors. Appl. Phys. Lett. 1994;64: 2486-2488.

Fullerene Layer. J. Appl. Phys. 2005;97: 093102.

emitting Diode. Adv. Mater. 2001;13: 123-127.


[42] Hobson P. A, Wedge S, Wasey J. A. E, Sage I, Barnes W. L. Surface Plasmon Mediated Emission from Organic Light-Emitting Diodes. Adv. Mater. 2002;14: 1393-1396.

Effect of Photonic Structures in Organic Light-Emitting Diodes

[59] Belayev S. V., Schadt M., Barnik M. I., Funfschilling J., Malimoneko N. V., Schmitt K., Large Aperture Polarized Light Source and Novel Liquid Crystal Display Operating

[60] Woon K. L, O'Neill M, Richards G. J, Aldred M. P, Kelly S. M, Fox A. M. Highly Circularly Polarized Photoluminescence over a Broad Spectral Range from a Calamitic, Hole-transporting, Chiral Nematic Glass and from an Indirectly Excited Dye. Adv.

[61] Geng Y, Trajkovska A, S. Culligan W, Ou J. J, Chen H. M. P, Katsis D, Chen S. H. Origin of Strong Chiroptical Activities in Films of Nonafluorenes with a Varying Extent of

[62] Jeong S. M., Ohtsuka Y., Ha N. Y., Takanishi Y., Ishikawa K., Takezoe H. Highly Circularly Polarized Electroluminescence from Organic Light-emitting Diodes with Wide-band Reflective Polymeric Cholesteric Liquid Crystal Films. Appl. Phys. Lett.

[63] Jeong S. M, Ha N. Y, Takezoe H, Nishimura S, Suzaki G. Polarization-tunable Electroluminescence Using Phase Retardation Based on Photonic Bandgap Liquid

[64] Hwang J, Song M. H, Park B, Nishimura S, Toyooka T, Wu J. W, Takanishi Y, Ishikawa K, Takezoe H. Electro-tunable Optical Diode Based on Photonic Bandgap Liquid-crystal

[65] Song M. H, Park B, Nishimura S, Toyooka T, Chung I. J, Takanishi Y, Ishikawa K, Takezoe H. Electrotunable Non-reciprocal Laser Emission from a Liquid-Crystal

[66] Song M. H, Park B, Shin K.-C, Ohta T, Tsunoda Y, Hoshi H, Takanishi Y, Ishikawa K, Watanabe J, Nishimura S, Toyooka T, Zhu Z, Swager T. M, Takezoe H. Effect of Phase Retardation on Defect-Mode Lasing in Polymeric Cholesteric Liquid Crystals. Adv.

[67] Broer D. J, Mol G. N. Wide-band Reflective Polarizers from Cholesteric Polymer

[68] Koo W. H, Jeong S. M, Nishimura S, Araoka F, Ishikawa K, Toyooka T, Takezoe H. Polarization Conversion in Surface-Plasmon-Coupled Emission from Organic Light-Emitting Diodes Using Spontaneously Formed Buckles. Adv. Mater. 2011;23: 1003-1007. [69] Inagaki T, Motosuga M, Yamamori K. Photo-acoustic Study of Plasmon Resonance-

[70] Inagaki T, Goudonnet J. P, Arakawa E. T. Plasma Resonance Absorption in Conical

[71] Elston S. J, Bryan-Brown G. P, Sambles J. R. Polarization Conversion from Diffraction

[72] Bristow A. D., Astratov V. N., Shimada R., Culshaw I. S., Skolnick M. S., Whittaker D. M., Tahraoui A., Krauss T. F., Polarization Conversion in the Reflectivity Properties of

Modes. Jpn. J. Appl. Phys. 1990;29: L634-L637.

Crystal. J. Appl. Phys. 2008;103: 113101.

Heterojunctions. Nat. Mater. 2005;4: 383-387.

Gratings. Phys. Rev. B. 1991;44: 6393-6400.

Photonic Device. Adv. Funct. Mater. 2006;16: 1793-1798.

Networks with a Pitch Gradient. Nature 1995;378: 467-469.

absorption in a Diffraction Grating. Phys. Rev. B. 1983;28: 1740-1744.

Diffraction: Effects of Groove Depth. J. Opt. Soc. Am. B 1986;3: 992-995.

Photonic Crystal Waveguides. IEEE J. Quantum. Elect. 2002;38: 880-884.

Pendant Chirality. J. Am. Chem. Soc. 2003;125: 14032-14038.

Mater. 2003;15: 1555-1558.

2007;90: 211106.

Mater. 2004;16: 779-783.

– Light Extraction and Polarization Characteristics 103


[59] Belayev S. V., Schadt M., Barnik M. I., Funfschilling J., Malimoneko N. V., Schmitt K., Large Aperture Polarized Light Source and Novel Liquid Crystal Display Operating Modes. Jpn. J. Appl. Phys. 1990;29: L634-L637.

102 Organic Light Emitting Devices

3497-3501.

074302.

7764-7767.

780.

362-365.

Polymer. Nature 1998;393: 146-149.

Phys. Lett. 1999;75: 2557-2559.

Films. J. Appl. Phys. 1989;65: 3610-3616.

Matrix. Appl. Phys. Lett. 2000;77: 1587-1589.

Photonics. Adv. Mater. 2003;15: 1135-1146.

Mater. 1999;11: 671-675.

Adv. Mater. 1999;11: 895-905.

Am. Chem. Soc. 1997;119: 9909-9910.

Light. Adv. Mater. 2001;13: 577-580.

[42] Hobson P. A, Wedge S, Wasey J. A. E, Sage I, Barnes W. L. Surface Plasmon Mediated Emission from Organic Light-Emitting Diodes. Adv. Mater. 2002;14: 1393-1396. [43] Bowden N, Brittain S, Evans A. G, Hutchinson J. W, Whitesides G. M. Spontaneous Formation of Ordered Structures in Thin Films of Metals Supported on an Elastomeric

[44] Okayasu T, Zhang H. L, Bucknall D. G, Briggs G. A. Spontaneous Formation of Ordered Lateral Patterns in Polymer Thin-film Structures. Adv. Func. Mater. 2004;14: 1081-1088. [45] Huck W. T. S, Bowden N, Onck P, Pardoen T, Hutchinson J. W, Whitesides G. M. Ordering of Spontaneously Formed Buckles on Planar Surfaces. Langmuir 2000;16:

[46] Allen H. G., Analysis and Design of Structural Sandwich Panels (Pergamon, 1969). [47] Cerda E, Mahadevan L. Geometry and Physics of Wrinkling. Phys. Rev. Lett. 2003;90:

[48] Bowden N., Huck W. T. S., Paul K. E., Whitesides G. M. The Controlled Formation of Ordered, Sinusoidal Structures by Plasma Oxidation of an Elastomeric Polymer. Appl.

[49] Kalinowski J, Palilis L. C, Kim W. H, Kafafi Z. H. Determination of the Width of the Carrier Recombination Zone in Organic Light-emitting Diodes. J. Appl. Phys. 2003;94:

[50] Tang C. W, VanSlyke S. A, Chen C. H. J. Electroluminescence of Doped Organic Thin

[51] Mochizuki H, Hasui T, Shiono T, Ikeda T, Adachi C, Taniguchi Y, Shirota Y. Emission Behavior of Molecularly Doped Electroluminescent Device Using Liquid-crystalline

[52] Furumi S, Sakka Y. Chiroptical Properties Induced in Chiral Photonic-Bandgap Liquid Crystals Leading to a Highly Efficient Laser-Feedback Effect. Adv. Mater. 2006;18: 775-

[53] O'Neill M, Kelly S. M. Liquid Crystals for Charge Transport, Luminescence, and

[54] Grell M, Knoll W, Lupo D, Meisel A, Miteva T, Neher D, Nothofer H, Scherf U, Yasuda A. Blue Polarized Electroluminescence from a Liquid Crystalline Polyfluorene. Adv.

[55] Grell M, Bradley D. D. C. Polarized Luminescence from Oriented Molecular Materials.

[56] Peeters E, Christians M. P. T, Janssen R.A. J, Schoo H. F. M, Dekkers H. P. J. M, Meijer E. W. Circularly Polarized electroluminescence from a Polymer Light-emitting Diode. J.

[57] Oda M, Nothofer H, Lieser G, Scherf U, Meskers S. C. J, Neher D. Circularly Polarized Electroluminescence from Liquid-Crystalline Chiral Polyfluorenes. Adv. Mater. 2000;12:

[58] Grell M., Oda M., Whitehead K. S., Asimakis A, Neher D, Bradley D. D. C. A Compact Device for the Efficient, Electrically Driven Generation of Highly Circularly Polarized


	- [73] Suyama T, Okuno Y, Matsuda T. Enhancement of TM-TE mode Conversion Caused by Excitation of Surface Plasmons on a Metal Grating and its Application for Refractive Index Measurement. Prog. Electromagn. Res. 2007;72: 91-103.

**Chapter 5** 

© 2012 Alimi et al., licensee InTech. This is an open access chapter distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

© 2012 Alimi et al., licensee InTech. This is a paper distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

**Photophysical Properties of Two New** 

**Donor-Acceptor Conjugated Copolymers** 

**in Polymer Light Emitting Diodes (PLEDs)** 

**and Polymer Photovoltaic Cells (PPCs)** 

S. Ayachi, A. Mabrouk, M. Bouachrine and K. Alimi

Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/54254

**1. Introduction** 

still poorly understood.

**and Their Model Compounds: Applications** 

Organic semiconductors hold the combined properties of inorganic semiconductors such as silicon and more desirable properties of plastics [1,2]. Since, the inception of the field of plastic electronics, various organic semiconductors including conjugated polymers and small molecules have been synthesized, studied, and applied to optoelectronic semiconductor device structures in order to improve efficiency, reduce cost or realize new

Recently, the exploitation of polymer as an active layer in organic electronic displays has received a particular attention. In this direction, greater efforts have been devoted to seek new possibilities for use in optoelectronic devices such as Polymer Light Emitting Diodes (PLEDs) [5-11], Polymer Photovoltaic Cells (PPCs) [12-23] and Polymer Field Effect Transistors (PFET) [24-33]. The field of PLEDs is still an active research area since the first conjugated conducting or semiconducting polymeric material, poly(p-phenylene-vinylene) (PPV), was reported by Burroughes et al. in 1990 [34]. In fact, only polymers can enable manufacturing of large-area light-emitting displays. These electronic devices need special polymers with specific and adapted properties. Since then, there have been increasing interests and research activities in synthesis and design of new polymeric materials for organic electronic devices. However, their properties and those of the related devices are

applications that are difficult to achieve with silicon-based technology [3,4].


**Photophysical Properties of Two New Donor-Acceptor Conjugated Copolymers and Their Model Compounds: Applications in Polymer Light Emitting Diodes (PLEDs) and Polymer Photovoltaic Cells (PPCs)** 

S. Ayachi, A. Mabrouk, M. Bouachrine and K. Alimi

Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/54254
