Colloidal cobalt-doped ZnO nanoparticles by microwave-assisted synthesis and their utilization in thin composite layers with MEH-PPV as an electroluminescent material for polymer light emitting diodes

Skoda, David; Urbanek, Pavel; Sevcik, Jakub; Munster, Lukas; Nadazdy, Vojtech; Cullen, David A.; Bazant, Pavel; Antos, Jan; Kuritka, Ivo

doi:10.1016/j.orgel.2018.05.037

Title: Colloidal cobalt-doped ZnO nanoparticles by microwave-assisted synthesis and their utilization in thin composite layers with MEH-PPV as an electroluminescent material for polymer light emitting diodes

Journal Article · Mon May 28 00:00:00 EDT 2018 · Organic Electronics

DOI:https://doi.org/10.1016/j.orgel.2018.05.037· OSTI ID:1490589

^[1]; Urbanek, Pavel ^[1]; Sevcik, Jakub ^[1]; Munster, Lukas ^[1]; Nadazdy, Vojtech ^[2];

^[3]; Bazant, Pavel ^[1]; Antos, Jan ^[1]; Kuritka, Ivo ^[1]

Tomas Bata University in Zlin (Czech Republic)
Slovak Academy of Sciences, Bratislava (Slovak Republic)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

In this study, Co_xZn_1-xO (x = 0.01, 0.05 and 0.1) nanoparticles were prepared by microwave-assisted polyol method from zinc acetate dihydrate and Co(II) acetylacetonate. The reactions were performed in diethylene glycol (DEG) at 250 °C with the use of oleic acid as a surfactant. Resulting nanoparticle (ca. 10 nm) precipitates were washed with methanol and dried or kept as colloidal solutions redispersed in toluene. Colloidal solutions were mixed with the Poly [2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) polymer to produce thin nanocomposite layers with specific optoelectronic properties. The electronic structure in terms of density of states (DOS) of MEH-PPV and MEH-PPV/nanocomposite layers was investigated by recently proposed energy resolved electrochemical impedance spectroscopy method. The MEH-PPV polymer and its nanocomposites with ZnO or Co_xZn_1-xO nanoparticles were used as thin active layers in polymer light emitting diodes (PLED). The nanocomposite layers exhibited optoelectronic properties which were found to be beneficial as the active layer in PLEDs, exhibiting an order of magnitude enhancement in electroluminescence intensity. Finally, a pronounced effect on the opening bias voltage of final devices with Co_xZn_1-xO nanoparticles was also observed.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC); USDOE Office of Nuclear Energy (NE)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1490589

Journal Information:: Organic Electronics, Vol. 59, Issue C; ISSN 1566-1199

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 23 works

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References (95)

ZnO: Material, Physics and Applications Klingshirn, C. ChemPhysChem, Vol. 8, Issue 6 https://doi.org/10.1002/cphc.200700002	journal	April 2007
A comprehensive review of ZnO materials and devices Özgür, Ü.; Alivov, Ya. I.; Liu, C. Journal of Applied Physics, Vol. 98, Issue 4 https://doi.org/10.1063/1.1992666	journal	August 2005
Synthesis of Colloidal Mn ²⁺ :ZnO Quantum Dots and High- T _C Ferromagnetic Nanocrystalline Thin Films Norberg, Nick S.; Kittilstved, Kevin R.; Amonette, James E. Journal of the American Chemical Society, Vol. 126, Issue 30 https://doi.org/10.1021/ja048427j	journal	August 2004
High-Temperature Ferromagnetism in ${N i}^{2 +}$ -Doped ZnO Aggregates Prepared from Colloidal Diluted Magnetic Semiconductor Quantum Dots Radovanovic, Pavle V.; Gamelin, Daniel R. Physical Review Letters, Vol. 91, Issue 15 https://doi.org/10.1103/PhysRevLett.91.157202	journal	October 2003
Co-Doped ZnO nanoparticles: Minireview Djerdj, Igor; Jagličić, Zvonko; Arčon, Denis Nanoscale, Vol. 2, Issue 7 https://doi.org/10.1039/c0nr00148a	journal	January 2010
Magnetic and electric properties of vanadium doped ZnO films Saeki, Hiromasa; Tabata, Hitoshi; Kawai, Tomoji Solid State Communications, Vol. 120, Issue 11 https://doi.org/10.1016/S0038-1098(01)00400-8	journal	November 2001
Anisotropic Ferromagnetism in Substituted Zinc Oxide Venkatesan, M.; Fitzgerald, C. B.; Lunney, J. G. Physical Review Letters, Vol. 93, Issue 17 https://doi.org/10.1103/PhysRevLett.93.177206	journal	October 2004
Cobalt-doped ZnO – a room temperature dilute magnetic semiconductor Fitzgerald, C. B.; Venkatesan, M.; Lunney, J. G. Applied Surface Science, Vol. 247, Issue 1-4 https://doi.org/10.1016/j.apsusc.2005.01.043	journal	July 2005
Structural, electrical and magnetic properties of Co and Fe co-doped ZnO nanoparticles prepared by solution combustion method Dinesha, M. L.; Jayanna, H. S.; Mohanty, S. Journal of Alloys and Compounds, Vol. 490, Issue 1-2 https://doi.org/10.1016/j.jallcom.2009.10.120	journal	February 2010
Ferromagnetism and possible application in spintronics of transition-metal-doped ZnO films Pan, F.; Song, C.; Liu, X. J. Materials Science and Engineering: R: Reports, Vol. 62, Issue 1 https://doi.org/10.1016/j.mser.2008.04.002	journal	June 2008
Recent progress on doped ZnO nanostructures for visible-light photocatalysis Samadi, Morasae; Zirak, Mohammad; Naseri, Amene Thin Solid Films, Vol. 605 https://doi.org/10.1016/j.tsf.2015.12.064	journal	April 2016
Enhanced blue-green emission and ethanol sensing of Co-doped ZnO nanocrystals prepared by a solvothermal route Li, Jin; Fan, Huiqing; Jia, Xiaohua Applied Physics A, Vol. 98, Issue 3 https://doi.org/10.1007/s00339-009-5489-3	journal	November 2009
Co-doped ZnO nanoparticles synthesized by an adapted sol–gel method: effects on the structural, optical, photocatalytic and antibacterial properties Lima, Michele Karoline; Fernandes, Daniela Martins; Silva, Marcela Fernandes Journal of Sol-Gel Science and Technology, Vol. 72, Issue 2 https://doi.org/10.1007/s10971-014-3310-z	journal	February 2014
Enhanced photocatalytic activity of Co doped ZnO nanodisks and nanorods prepared by a facile wet chemical method Kuriakose, Sini; Satpati, Biswarup; Mohapatra, Satyabrata Physical Chemistry Chemical Physics, Vol. 16, Issue 25 https://doi.org/10.1039/c4cp01315h	journal	January 2014
The effect of Co and In combinational or individual doping on the structural, optical and selective sensing properties of ZnO nanoparticles Maswanganye, Mpho William; Rammutla, K. E.; Mosuang, T. E. Sensors and Actuators B: Chemical, Vol. 247 https://doi.org/10.1016/j.snb.2017.02.039	journal	August 2017
One-pot synthesis of Co-doped ZnO hierarchical aggregate and its high gas sensor performance Yin, Mingli; Liu, Shengzhong Materials Chemistry and Physics, Vol. 149-150 https://doi.org/10.1016/j.matchemphys.2014.10.027	journal	January 2015
Improved selective acetone sensing properties of Co-doped ZnO nanofibers by electrospinning Liu, Li; Li, Shouchun; Zhuang, Juan Sensors and Actuators B: Chemical, Vol. 155, Issue 2 https://doi.org/10.1016/j.snb.2011.01.047	journal	July 2011
Improved Performance of Organic Light-Emitting Diodes Fabricated on Al-Doped ZnO Anodes Incorporating a Homogeneous Al-Doped ZnO Buffer Layer Grown by Atomic Layer Deposition Choi, Yong-June; Gong, Su Cheol; Park, Chang-Sun ACS Applied Materials & Interfaces, Vol. 5, Issue 9 https://doi.org/10.1021/am400140c	journal	March 2013
Transition-Metal-Doped Zinc Oxide Nanoparticles as a New Lithium-Ion Anode Material Bresser, Dominic; Mueller, Franziska; Fiedler, Martin Chemistry of Materials, Vol. 25, Issue 24 https://doi.org/10.1021/cm403443t	journal	December 2013
Influence of cobalt doping on the crystalline structure, optical and mechanical properties of ZnO thin films Bahadur, Nupur; Srivastava, A. K.; Kumar, Sushil Thin Solid Films, Vol. 518, Issue 18 https://doi.org/10.1016/j.tsf.2010.04.113	journal	July 2010
Aqueous Synthesis of Mn- and Co-Doped ZnO Nanorods Panigrahy, Bharati; Aslam, M.; Bahadur, D. The Journal of Physical Chemistry C, Vol. 114, Issue 27 https://doi.org/10.1021/jp102163b	journal	June 2010
Colloidal Cobalt-Doped ZnO Nanorods: Synthesis, Structural, and Magnetic Properties Büsgen, Thomas; Hilgendorff, M.; Irsen, S. The Journal of Physical Chemistry C, Vol. 112, Issue 7 https://doi.org/10.1021/jp077546t	journal	February 2008
Colloidal Transition-Metal-Doped ZnO Quantum Dots Radovanovic, Pavle V.; Norberg, Nick S.; McNally, Kathryn E. Journal of the American Chemical Society, Vol. 124, Issue 51 https://doi.org/10.1021/ja028416v	journal	December 2002
Signature of Intrinsic High-Temperature Ferromagnetism in Cobalt-Doped Zinc Oxide Nanocrystals Wang, X. F.; Xu, J. B.; Zhang, B. Advanced Materials, Vol. 18, Issue 18 https://doi.org/10.1002/adma.200600396	journal	September 2006
Synthesis and Optical Properties of Co-Doped ZnO Submicrometer Tubes from Electrospun Fiber Templates Ochanda, Frederick; Cho, Kevin; Andala, Dickson Langmuir, Vol. 25, Issue 13 https://doi.org/10.1021/la802753k	journal	May 2009
Synthesis of Co-doped ZnO nanoparticles by sol–gel method and its characterization El Ghoul, J.; Kraini, M.; El Mir, L. Journal of Materials Science: Materials in Electronics, Vol. 26, Issue 4 https://doi.org/10.1007/s10854-015-2722-z	journal	February 2015
Hydrothermal synthesis of Co-doped ZnO flakes with room temperature ferromagnetism Xu, Xingyan; Cao, Chuanbao Journal of Alloys and Compounds, Vol. 501, Issue 2 https://doi.org/10.1016/j.jallcom.2010.04.086	journal	July 2010
Co-metal clustering as the origin of ferromagnetism in Co-doped ZnO thin films Park, Jung H.; Kim, Min G.; Jang, Hyun M. Applied Physics Letters, Vol. 84, Issue 8 https://doi.org/10.1063/1.1650915	journal	February 2004
Preparation and structural-optical characterization of dip-coated nanostructured Co-doped ZnO dilute magnetic oxide thin films Valério, L. R.; Mamani, N. C.; de Zevallos, A. O. RSC Advances, Vol. 7, Issue 33 https://doi.org/10.1039/C7RA01200D	journal	January 2017
Chemical Synthesis and Structural and Magnetic Properties of Dispersible Cobalt- and Nickel-Doped ZnO Nanocrystals Singhal, Anshu; Achary, S. N.; Manjanna, J. The Journal of Physical Chemistry C, Vol. 114, Issue 8 https://doi.org/10.1021/jp9105579	journal	February 2010
Colloidal ZnO and Zn _1−x Co _x O tetrapod nanocrystals with tunable arm lengths Hodges, James M.; Fenton, Julie L.; Gray, Jennifer L. Nanoscale, Vol. 7, Issue 40 https://doi.org/10.1039/C5NR04425A	journal	January 2015
Solvent Dependent Shape and Magnetic Properties of Doped ZnO Nanostructures Clavel, G.; Willinger, M. -G.; Zitoun, D. Advanced Functional Materials, Vol. 17, Issue 16 https://doi.org/10.1002/adfm.200601142	journal	August 2007
Microwave-Assisted Nonaqueous Sol−Gel Chemistry for Highly Concentrated ZnO-Based Magnetic Semiconductor Nanocrystals Bilecka, Idalia; Luo, Li; Djerdj, Igor The Journal of Physical Chemistry C, Vol. 115, Issue 5 https://doi.org/10.1021/jp108050w	journal	December 2010
Paramagnetism of cobalt-doped ZnO nanoparticles obtained by microwave solvothermal synthesis Wojnarowicz, Jacek; Kusnieruk, Sylwia; Chudoba, Tadeusz Beilstein Journal of Nanotechnology, Vol. 6 https://doi.org/10.3762/bjnano.6.200	journal	January 2015
Microwave-Assisted Synthesis of Colloidal Inorganic Nanocrystals Baghbanzadeh, Mostafa; Carbone, Luigi; Cozzoli, P. Davide Angewandte Chemie International Edition, Vol. 50, Issue 48 https://doi.org/10.1002/anie.201101274	journal	November 2011
Microwave Hydrothermal Synthesis and Photocatalytic Performance of ZnO and M :ZnO Nanostructures ( M = V, Fe, Co) Milao, ThaísM.; de Mendonça, VagnerR.; Araújo, ViníciusD. Science of Advanced Materials, Vol. 4, Issue 1 https://doi.org/10.1166/sam.2012.1251	journal	January 2012
Energy Transfer versus Charge Separation in Type-II Hybrid Organic−Inorganic Nanocomposites Lutich, Andrey A.; Jiang, Guoxin; Susha, Andrei S. Nano Letters, Vol. 9, Issue 7 https://doi.org/10.1021/nl900978a	journal	June 2009
Energy Transfer Dynamics of Nanocrystal−Polymer Composites Warner, Jamie H.; Watt, Andrew R.; Thomsen, Elizabeth The Journal of Physical Chemistry B, Vol. 109, Issue 18 https://doi.org/10.1021/jp044531b	journal	May 2005
Electroluminescence from light-emitting polymer/ZnO nanoparticle heterojunctions at sub-bandgap voltages Qian, Lei; Zheng, Ying; Choudhury, Kaushik R. Nano Today, Vol. 5, Issue 5, p. 384-389 https://doi.org/10.1016/j.nantod.2010.08.010	journal	January 2010
Efficient Hybrid Solar Cells from Zinc Oxide Nanoparticles and a Conjugated Polymer Beek, W. J. E.; Wienk, M. M.; Janssen, R. A. J. Advanced Materials, Vol. 16, Issue 12, p. 1009-1013 https://doi.org/10.1002/adma.200306659	journal	June 2004
Hybrid solar cells based on MEH-PPV and thin film semiconductor oxides (TiO2, Nb2O5, ZnO, CeO2 and CeO2–TiO2): Performance improvement during long-time irradiation Lira-Cantu, Monica; Krebs, Frederik C. Solar Energy Materials and Solar Cells, Vol. 90, Issue 14 https://doi.org/10.1016/j.solmat.2006.02.007	journal	September 2006
A facile route for preparation of conjugated polymer functionalized inorganic semiconductors and direct application in hybrid photovoltaic devices Geng, Hongwei; Guo, Ying; Peng, Ruixiang Solar Energy Materials and Solar Cells, Vol. 94, Issue 7 https://doi.org/10.1016/j.solmat.2010.03.036	journal	July 2010
Recent progress of high performance polymer OLED and OPV materials for organic printed electronics Sekine, Chizu; Tsubata, Yoshiaki; Yamada, Takeshi Science and Technology of Advanced Materials, Vol. 15, Issue 3 https://doi.org/10.1088/1468-6996/15/3/034203	journal	June 2014
Electroluminescence in conjugated polymers Friend, R. H.; Gymer, R. W.; Holmes, A. B. Nature, Vol. 397, Issue 6715 https://doi.org/10.1038/16393	journal	January 1999
Improved efficiency of solar cells based on BEHP-co-MEH-PPV doped with ZnO nanoparticles Mustapha, N.; Ibnaouf, K. H.; Fekkai, Z. Optik, Vol. 124, Issue 22 https://doi.org/10.1016/j.ijleo.2013.03.161	journal	November 2013
Efficient Near-Infrared Polymer Nanocrystal Light-Emitting Diodes Tessler, N. Science, Vol. 295, Issue 5559 https://doi.org/10.1126/science.1068153	journal	February 2002
Visible light emission from semiconducting polymer diodes Braun, D.; Heeger, A. J. Applied Physics Letters, Vol. 58, Issue 18 https://doi.org/10.1063/1.105039	journal	May 1991
25th Anniversary Article: Charge Transport and Recombination in Polymer Light-Emitting Diodes Kuik, Martijn; Wetzelaer, Gert-Jan A. H.; Nicolai, Herman T. Advanced Materials, Vol. 26, Issue 4 https://doi.org/10.1002/adma.201303393	journal	January 2014
Enhanced luminance in polymer composite light emitting devices Carter, S. A.; Scott, J. C.; Brock, P. J. Applied Physics Letters, Vol. 71, Issue 9 https://doi.org/10.1063/1.119848	journal	September 1997
Blue shift in the luminescence spectra of MEH-PPV films containing ZnO nanoparticles Ton-That, Cuong; Phillips, Matthew R.; Nguyen, Thien-Phap Journal of Luminescence, Vol. 128, Issue 12 https://doi.org/10.1016/j.jlumin.2008.07.004	journal	December 2008
Electrical and optical properties of light-emitting field-effect transistors based on MEH-PPV polymer composite films with ZnO nanoparticles Aleshin, A. N.; Shcherbakov, I. P.; Fedichkin, F. S. Physics of the Solid State, Vol. 54, Issue 12 https://doi.org/10.1134/S1063783412120025	journal	December 2012
Zinc oxide nanorods/polymer hybrid heterojunctions for white light emitting diodes Willander, M.; Nur, O.; Zaman, S. Journal of Physics D: Applied Physics, Vol. 44, Issue 22 https://doi.org/10.1088/0022-3727/44/22/224017	journal	May 2011
Hybrid electroluminescent device based on MEH-PPV and ZnO Hewidy, Dina.; Gadallah, A. -S.; Fattah, G. Abdel Physica B: Condensed Matter, Vol. 507 https://doi.org/10.1016/j.physb.2016.11.034	journal	February 2017
Photoelectrochemical properties of ZnO nanocrystals/MEH-PPV composite: The effects of nanocrystals synthetic route, film deposition and electrolyte composition Petrella, A.; Curri, M. L.; Striccoli, M. Thin Solid Films, Vol. 595 https://doi.org/10.1016/j.tsf.2015.10.077	journal	November 2015
Investigations of optical properties of MEH-PPV/ZnO nanocomposites by photoluminescence spectroscopy Musa, Ishaq; Massuyeau, Florian; Faulques, Eric Synthetic Metals, Vol. 162, Issue 19-20 https://doi.org/10.1016/j.synthmet.2012.01.011	journal	November 2012
Towards See-Through Displays: Fully Transparent Thin-Film Transistors Driving Transparent Organic Light-Emitting Diodes Görrn, P.; Sander, M.; Meyer, J. Advanced Materials, Vol. 18, Issue 6 https://doi.org/10.1002/adma.200501957	journal	March 2006
An Indium-Free Anode for Large-Area Flexible OLEDs: Defect-Free Transparent Conductive Zinc Tin Oxide Morales-Masis, Monica; Dauzou, Fabien; Jeangros, Quentin Advanced Functional Materials, Vol. 26, Issue 3 https://doi.org/10.1002/adfm.201503753	journal	December 2015
Energy resolved electrochemical impedance spectroscopy for electronic structure mapping in organic semiconductors Nádaždy, V.; Schauer, F.; Gmucová, K. Applied Physics Letters, Vol. 105, Issue 14 https://doi.org/10.1063/1.4898068	journal	October 2014
Electrochemical Spectroscopic Methods for the Fine Band Gap Electronic Structure Mapping in Organic Semiconductors Gmucová, Katarína; Nádaždy, Vojtech; Schauer, František The Journal of Physical Chemistry C, Vol. 119, Issue 28 https://doi.org/10.1021/acs.jpcc.5b04378	journal	June 2015
Polyol-Mediated Synthesis of Nanoscale Functional Materials Feldmann, C. Advanced Functional Materials, Vol. 13, Issue 2 https://doi.org/10.1002/adfm.200390014	journal	February 2003
Microwave-Assisted Synthesis of Metallic Nanostructures in Solution Tsuji, Masaharu; Hashimoto, Masayuki; Nishizawa, Yuki Chemistry - A European Journal, Vol. 11, Issue 2 https://doi.org/10.1002/chem.200400417	journal	January 2005
Continuous Size Tuning of Monodisperse ZnO Colloidal Nanocrystal Clusters by a Microwave‐Polyol Process and Their Application for Humidity Sensing Hu, Xianluo; Gong, Jingming; Zhang, Lizhi Advanced Materials, Vol. 20, Issue 24 https://doi.org/10.1002/adma.200801433	journal	December 2008
Dispersion and surface functionalization of oxide nanoparticles for transparent photocatalytic and UV-protecting coatings and sunscreens Faure, Bertrand; Salazar-Alvarez, German; Ahniyaz, Anwar Science and Technology of Advanced Materials, Vol. 14, Issue 2 https://doi.org/10.1088/1468-6996/14/2/023001	journal	March 2013
The surface science of nanocrystals Boles, Michael A.; Ling, Daishun; Hyeon, Taeghwan Nature Materials, Vol. 15, Issue 2 https://doi.org/10.1038/nmat4526	journal	January 2016
The Metal-Ion-Catalyzed Alcoholysis of β-Dicarbonyl Compounds Uehara, Kaku; Kitamura, Fujio; Tanaka, Makoto Bulletin of the Chemical Society of Japan, Vol. 49, Issue 2 https://doi.org/10.1246/bcsj.49.493	journal	February 1976
Synthesis of ZnO Nanocrystals with Cone, Hexagonal Cone, and Rod Shapes via Non-Hydrolytic Ester Elimination Sol–Gel Reactions Joo, J.; Kwon, S. G.; Yu, J. H. Advanced Materials, Vol. 17, Issue 15 https://doi.org/10.1002/adma.200402109	journal	August 2005
Nonhydrolytic Alcoholysis Route to Morphology-Controlled ZnO Nanocrystals Zhong, Xinghua; Feng, Yaoyu; Zhang, Yuliang Small, Vol. 3, Issue 7 https://doi.org/10.1002/smll.200600684	journal	July 2007
Synthesis and characterization of nano-sized ZnO powders by direct precipitation method Chen, ChangChun; Liu, Ping; Lu, ChunHua Chemical Engineering Journal, Vol. 144, Issue 3 https://doi.org/10.1016/j.cej.2008.07.047	journal	November 2008
Influence of Co-doping on the structural, optical and magnetic properties of ZnO nanoparticles synthesized using auto-combustion method Elilarassi, R.; Chandrasekaran, G. Journal of Materials Science: Materials in Electronics, Vol. 24, Issue 1 https://doi.org/10.1007/s10854-012-0893-4	journal	October 2012
The structure and optical properties of ZnO nanocrystals dependence on Co-doping levels Wang, Sha; Li, Ping; Liu, Hui Journal of Alloys and Compounds, Vol. 505, Issue 1 https://doi.org/10.1016/j.jallcom.2010.05.183	journal	August 2010
Green Coloration of Co-Doped ZnO Explained from Structural Refinement and Bond Considerations Gaudon, M.; Toulemonde, O.; Demourgues, A. Inorganic Chemistry, Vol. 46, Issue 26 https://doi.org/10.1021/ic701157j	journal	November 2007
Physical structure and optical properties of Co-doped ZnO nanoparticles prepared by co-precipitation He, Rongliang; Tang, Bin; Ton-That, Cuong Journal of Nanoparticle Research, Vol. 15, Issue 11 https://doi.org/10.1007/s11051-013-2030-6	journal	October 2013
Co-doped ZnO nanopowders: Location of cobalt and reduction in photocatalytic activity He, Rongliang; Hocking, Rosalie K.; Tsuzuki, Takuya Materials Chemistry and Physics, Vol. 132, Issue 2-3 https://doi.org/10.1016/j.matchemphys.2011.12.061	journal	February 2012
Energy gap, excitonic, and ‘‘internal’’ ${Mn}^{2 +}$ optical transition in Mn-based II-VI diluted magnetic semiconductors Lee, Y. R.; Ramdas, A. K.; Aggarwal, R. L. Physical Review B, Vol. 38, Issue 15 https://doi.org/10.1103/PhysRevB.38.10600	journal	November 1988
Optical Spectra of Ni ²⁺ , Co ²⁺ , and Cu ²⁺ in Tetrahedral Sites in Crystals Weakliem, Herbert A. The Journal of Chemical Physics, Vol. 36, Issue 8 https://doi.org/10.1063/1.1732840	journal	April 1962
Comparative Study of Ni- and Co-Substituted ZnO Nanoparticles: Synthesis, Optical, and Magnetic Properties Balti, Imen; Mezni, Amine; Dakhlaoui-Omrani, Amel The Journal of Physical Chemistry C, Vol. 115, Issue 32 https://doi.org/10.1021/jp201916z	journal	July 2011
Magnetic Quantum Dots: Synthesis, Spectroscopy, and Magnetism of Co ²⁺ - and Ni ²⁺ -Doped ZnO Nanocrystals Schwartz, Dana A.; Norberg, Nick S.; Nguyen, Quyen P. Journal of the American Chemical Society, Vol. 125, Issue 43 https://doi.org/10.1021/ja036811v	journal	October 2003
Preparation and band gap energies of ZnO nanotubes, nanorods and spherical nanostructures Rusdi, Roshidah; Rahman, Azilah Abd; Mohamed, Nor Sabirin Powder Technology, Vol. 210, Issue 1 https://doi.org/10.1016/j.powtec.2011.02.005	journal	June 2011
Room-temperature ferromagnetism in well-aligned Zn1−xCoxO nanorods Wu, Jih-Jen; Liu, Sai-Chang; Yang, Ming-Hsun Applied Physics Letters, Vol. 85, Issue 6 https://doi.org/10.1063/1.1779958	journal	August 2004
Controlled Co(II) Doping of Zinc Oxide Nanocrystals Bohle, D. Scott; Spina, Carla J. The Journal of Physical Chemistry C, Vol. 114, Issue 42 https://doi.org/10.1021/jp108391e	journal	October 2010
Photoluminescence quenching in cobalt doped ZnO nanocrystals Yamamoto, Sekika Journal of Applied Physics, Vol. 111, Issue 9 https://doi.org/10.1063/1.4710533	journal	May 2012
Luminescence properties of poly- (phenylene vinylene) derivatives Ton-That, Cuong; Stockton, Geoff; Phillips, Matthew R. Polymer International, Vol. 57, Issue 3 https://doi.org/10.1002/pi.2373	journal	January 2008
Chain organization and photophysics of conjugated polymer in poor solvents: Aggregates, agglomerates and collapsed coils Traiphol, Rakchart; Charoenthai, Nipaphat; Srikhirin, Toemsak Polymer, Vol. 48, Issue 3 https://doi.org/10.1016/j.polymer.2006.12.003	journal	January 2007
Thickness threshold of structural ordering in thin MEH-PPV films Urbánek, Pavel; Kuřitka, Ivo; Daniš, Stanislav Polymer, Vol. 55, Issue 16 https://doi.org/10.1016/j.polymer.2014.05.054	journal	August 2014
Charge separation and transport in conjugated-polymer/semiconductor-nanocrystal composites studied by photoluminescence quenching and photoconductivity Greenham, N. C.; Peng, Xiaogang; Alivisatos, A. P. Physical Review B, Vol. 54, Issue 24 https://doi.org/10.1103/PhysRevB.54.17628	journal	December 1996
Influence of Photoactive Layer Structure on Device Performance of Poly(2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene vinylene)-CuInS₂/ZnO Solar Cells Yue, Wenjin; Sun, Wenshan; Wang, Songming Journal of Nanoscience and Nanotechnology, Vol. 15, Issue 6 https://doi.org/10.1166/jnn.2015.9699	journal	June 2015
Photovoltage method for the research of CdS and ZnO nanoparticles and hybrid MEH-PPV/nanoparticle structures Toušková, J.; Toušek, J.; Rohovec, J. Journal of Nanoparticle Research, Vol. 16, Issue 3 https://doi.org/10.1007/s11051-014-2314-5	journal	February 2014
The improvement of near-ultraviolet electroluminescence of ZnO nanorods/MEH-PPV heterostructure by using a ZnS buffer layer Wang, Da-Wei; Zhao, Su-Ling; Xu, Zheng Organic Electronics, Vol. 12, Issue 1 https://doi.org/10.1016/j.orgel.2010.09.018	journal	January 2011
Unification of the Hole Transport in Polymeric Field-Effect Transistors and Light-Emitting Diodes Tanase, C.; Meijer, E. J.; Blom, P. W. M. Physical Review Letters, Vol. 91, Issue 21 https://doi.org/10.1103/PhysRevLett.91.216601	journal	November 2003
Thermodynamically feasible photoelectron transfer from bioactive π-expanded imidazole luminophores to ZnO nanocrystals Jayabharathi, Jayaraman; Karunakaran, Chockalingam; Kalaiarasi, Vellaikannu New Journal of Chemistry, Vol. 39, Issue 3 https://doi.org/10.1039/C4NJ02003K	journal	January 2015
Electrical and Electrochemical Properties of Conducting Polymers Le, Thanh-Hai; Kim, Yukyung; Yoon, Hyeonseok Polymers, Vol. 9, Issue 12 https://doi.org/10.3390/polym9040150	journal	April 2017
Doped organic semiconductors: Physics and application in light emitting diodes Pfeiffer, M.; Leo, K.; Zhou, X. Organic Electronics, Vol. 4, Issue 2-3, p. 89-103 https://doi.org/10.1016/j.orgel.2003.08.004	journal	September 2003
Doping of organic semiconductors Lüssem, B.; Riede, M.; Leo, K. physica status solidi (a), Vol. 210, Issue 1 https://doi.org/10.1002/pssa.201228310	journal	December 2012
Unification of trap-limited electron transport in semiconducting polymers Nicolai, H. T.; Kuik, M.; Wetzelaer, G. A. H. Nature Materials, Vol. 11, Issue 10 https://doi.org/10.1038/nmat3384	journal	July 2012
Electrochemical properties of luminescent polymers and polymer light-emitting electrochemical cells Li, Yongfang; Cao, Yong; Gao, Jun Synthetic Metals, Vol. 99, Issue 3 https://doi.org/10.1016/S0379-6779(99)00007-7	journal	February 1999

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