Third Day Poster Session, 17 June 2010 - NanoTR-VI

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Poster Session, Thursday, June 17
Theme F686 - N1123
Synthesis and Characterization of CuInSR2R Quantum Dots for New Generation Hybrid Solar Cells
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Cihan ÖzsoyP P, Banu AydnP P, UCeylan ZaferUP P*, Sddk çliP
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PSolar Energy Institute, Ege University, Izmir 35100, Turkey
Abstract-CuInSR2R nanoparticles with different semiconductor properties depending on chemical compositions, different particle sizes and
surface properties have been synthesized and used as n-type semiconductor in hybrid solar cell. Solar cell performances were investigated under
standart AM1.5 conditions. Charge recombination and charge transport properties in conjugated polymer: QD bulkheterojunction film was
investigate by of Electrochemical Impedance Spectroscopy (EIS).
Nanocrystalline materials have attracted a great deal of
attention from researchers in various fields for both their
fundamental size-dependent properties and their many
important technological applications [1].
Among the various nanocrystals, transition metal
chalcogenide nanocrystals have been investigated for many
applications, including biological labeling, light emitting
diodes, and photovoltaic devices. Quantum dot (QD) solar
cells have the potential to increase the maximum attainable
thermodynamic conversion efficiency of solar photon
conversion up to about 66% by utilizing hot photogenerated
carriers to produce higher photovoltages or higher
photocurrents. [2]
Especially Copper Indium Sulfides (CuInSR2R) and Copper
Indium Sellenides (CuInSeR2R) quantum dots are the most
attractive for photovoltaic applications. Energy level of
CuInSR2 Ris suitable to use as both p- and n- type semiconductor
in solar cells.
Characterizations of products were carried out several
analysis techniques (UV-Vis, XRD, TEM, XPS etc.)
Figure 3. XRD pattern of CuInSR2R products
Distribution(1/nm)
0.15
0.10
0.05
Particle-/Pore-size Distribution(Volume)
0.00
0.00 5.00 10.00 15.00 20.00 25.00
Particle/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 solar
cell
We do the synthesis of these quantum dots (QD) with
various synthetic routes with different uniform sizes, shapes
and make a structural, optical, electrochemical
characterization. We are able to synthesize a uniform multy
gram quantity in one-pot reaction [3, 4].
QDs were used as n-type semiconductors in combination of
conjugated 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) which
are p-type materials. Two different configuration of solar cell
investigated in the frame of this work. Geometrical structures
are shown in the figure below:
Figure 2. Hybrid solar cell structures a) mixture b) double layer
Current Density (mAcm -2 )
0,04
0,03
0,02
0,01
0,00
-0,01
-0,02
-0,03
-0,04
-0,05
Isc [mA/cm 2 ] : 0,029
Voc [mV] : 140
FF : 0,42
MPoweroutput [mW/cm 2 ] : 0,0017
Vmp [mV] : 90
Imp [mA/cm 2 ] : 0,018
Efficiency [%] : 0,0017
0,0 0,1 0,2
Applied Bias (V)
Figure 5. Photovoltaic performance of QD:MDMO-PPV based solar
cell.
*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, 2520-2521
6th Nanoscience and Nanotechnology Conference, zmir, 2010 766