Photonic crystals in biology - NanoTR-VI

PPoster Session, Thursday, June 17Theme F686 - N1123Synthesis and Characterization of CuInSR2R Quantum Dots for New Generation Hybrid Solar Cells1111Cihan ÖzsoyP P, Banu AydnP P, UCeylan ZaferUP P*, Sddk çliP1PSolar Energy Institute, Ege University, Izmir 35100, TurkeyAbstract-CuInSR2R nanoparticles with different semiconductor properties depending on chemical compositions, different particle sizes andsurface properties have been synthesized and used as n-type semiconductor in hybrid solar cell. Solar cell performances were investigated understandart AM1.5 conditions. Charge recombination and charge transport properties in conjugated polymer: QD bulkheterojunction film wasinvestigate by of Electrochemical Impedance Spectroscopy (EIS).Nanocrystalline materials have attracted a great deal ofattention from researchers in various fields for both theirfundamental size-dependent properties and their manyimportant technological applications [1].Among the various nanocrystals, transition metalchalcogenide nanocrystals have been investigated for manyapplications, including biological labeling, light emittingdiodes, and photovoltaic devices. Quantum dot (QD) solarcells have the potential to increase the maximum attainablethermodynamic conversion efficiency of solar photonconversion up to about 66% by utilizing hot photogeneratedcarriers to produce higher photovoltages or higherphotocurrents. [2]Especially Copper Indium Sulfides (CuInSR2R) and CopperIndium Sellenides (CuInSeR2R) quantum dots are the mostattractive for photovoltaic applications. Energy level ofCuInSR2 Ris suitable to use as both p- and n- type semiconductorin solar cells.Characterizations of products were carried out severalanalysis techniques (UV-Vis, XRD, TEM, XPS etc.)Figure 3. XRD pattern of CuInSR2R productsDistribution(1/nm)0.150.100.05Particle-/Pore-size Distribution(Volume)0.000.00 5.00 10.00 15.00 20.00 25.00Particle/Pore diameter(nm)Figure 4. Particle size distribution of nano-particles.CuInS2:MDMO-PPV (1:1)Figure 1. Energy levels of materials that used in fabrication of solarcellWe do the synthesis of these quantum dots (QD) withvarious synthetic routes with different uniform sizes, shapesand make a structural, optical, electrochemicalcharacterization. We are able to synthesize a uniform multygram quantity in one-pot reaction [3, 4].QDs were used as n-type semiconductors in combination ofconjugated polymers such as poly-3-heyxl thiophene (P3HT)and Poly [2-methoxy-5-(2-ethyl-hexyloxy)-1,4-phenyl vinyl](MEH-PPV) and poly-[2-(3,7-dimethyloctyloxy)-5-methyloxy]-para-phenylene-vinylene (MDMO-PPV) whichare p-type materials. Two different configuration of solar cellinvestigated in the frame of this work. Geometrical structuresare shown in the figure below:Figure 2. Hybrid solar cell structures a) mixture b) double layerCurrent Density (mAcm -2 )0,040,030,020,010,00-0,01-0,02-0,03-0,04-0,05Isc [mA/cm 2 ] : 0,029Voc [mV] : 140FF : 0,42MPoweroutput [mW/cm 2 ] : 0,0017Vmp [mV] : 90Imp [mA/cm 2 ] : 0,018Efficiency [%] : 0,00170,0 0,1 0,2Applied Bias (V)Figure 5. Photovoltaic performance of QD:MDMO-PPV based solarcell.*Corresponding author: HTceylan.zafer@ege.edu.trT[1] C. Czekelius, M. Hilgendorff, L. Spanhel, I. Bedja, M.Lench, G.Müller, U. Bloeck, D. Su, and M. Giersig,Adv. Mater. 11 (1999) 8,643[2] A. J. Nozik Physica , 14( 2002) 115-120.[3] Park, J.; An, K.; Hwang, Y.; Park, J.-G.; Noh, H.-J.; Kim, J.-Y.;Park,J.-H.; Hwang, N.-M.; Hyeon, T. Nat. Mater. 2004, 3, 891-895.[4] Sang-Hyun Choi, Eung-Gyu Kim and Taeghwan Hyeon, J. AM.CHEM. SOC. 2006, 128, 2520-25216th Nanoscience and Nanotechnology Conference, zmir, 2010 766