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Title: A Systematic Study on Bulk Heterojunction Solar Cells from PQT-12
Keywords: PQT-12, C70PCBM, Bulk heterojunction solar cells, CdS, Spin coating, Organic solar cells
Issue Date: 2-Jun-2008
Citation: PARDHASARADHI VEMULAMADA (2008-06-02). A Systematic Study on Bulk Heterojunction Solar Cells from PQT-12. ScholarBank@NUS Repository.
Abstract: Blends of regioregular poly(3,3b b b -didodecyl quaterthiophene) (PQT-12) with (6,6)-phenyl-C71-butyric acid methyl ester (C70PCBM) were investigated as active layers for application in organic photovoltaics (OPV). By careful control of the PQT-12:C70PCBM composition ratio, solvent selection, spinning speed and annealing temperatures, power conversion efficiency (PCE) of 1.4% could be obtained, even though this is the first effort in employing PQT-12:C70PCBM for a solar cell. Effects of different variables on the incident photon conversion efficiency (IPCE), short circuit density (Jsc) and open circuit voltage (Voc) were presented. Absorption spectra, Photoluminescence, Atomic force microscopy and X-ray diffraction studies were used to understand the effect of these variables on device performance. The observed trend in PCE was explained on the basis of the balance between free charge carriers generation and transport with in the device. Use of an inorganic acceptor (CdS) was also investigated to make use of its better stability compared to C70PCBM.
Appears in Collections:Master's Theses (Open)

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