Research Information System
4th. International Marmara Sciences Congress, IMASCON 2020 Spring, Kocaeli, Turkey, 19 - 20 June 2020, pp.1
The organic photovoltaics solar cells have
attracted a lot of attention over the last few decades. Comparing with
conventional photovoltaic materials, polymer based organic solar cells offer
many practical advantages due to low-cost and easy fabrication techniques, and
potential to deposit on flexible materials. Additionally, organic polymer
materials also have relatively high absorption coefficients (~4x105
cm-1) in the visible range of electromagnetic spectrum. A typical conductive polymer based solar cell
has a sandwiched structure with anode, photoactive material, and cathode. In
order to improve device performances, it is often to introduce interfacial
layers between the anode and cathode interfaces. These interfacial layers can
be conductive polymers, nano-structure materials or metal oxides. In addition
to these properties, the organic solar cells are the potential to double
the efficiency by using the tandem structure.
In this study, the blended of
poly(3-hexylthiophene-2,5-diyl) (P3HT) and [6,6]-phenyl C61-butyric acid methyl
ester (PCBM) bulk heterojunction (BHJ) photoactive layer has been used to
produce inverted polymer solar cells (IPSC). In order to deposit metal oxide
layers, two different methods were used, RF magnetron sputtering and
spin-coating methods. Metal oxide of TiO2, SnO2 and ZnO
were coated on well cleaned ITO and FTO. Spin-coater method was used to produce
the P3HT:PCBM organic photoactive thin film layer on the metal oxide layers. The
hole-collecting layer of molybdenum
trioxide (MoO3) and the top metal electrode of silver (Ag) layers were
deposited on the Glass/FTO or ITO/Metal oxide/P3HT:PCBM
by using thermal evaporation method. The surface morphology, structural and optical properties of TiO2,
SnO2 and ZnO electron selective layers were studied by
performing X-ray diffraction (XRD), confocal Raman spectroscopy, transmittance
spectra and Atomic Force Microscope (AFM). Produced IPSC devices with TiO2
SnO2 and ZnO thin films indicated the best device performance
with PCE values in between 1.62 and 3.91%.