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2016 Compound Semiconductor Week (CSW) [includes 28th International Conference on Indium Phosphide & Related Materials (IPRM) and 43rd International Symposium on Compound Semiconductors (ISCS)]
Bismuth ferrite (BiFeO3) thin films were fabricated by a simple spin-coating method. Polycrystalline BiFeO3 thin films were confirmed by X-ray diffraction. Lattice constants and crystallite sizes of the BiFeO3 thin films increased with increasing concentration of BiFeO3 precursor solution. BiFeO3/CH3NH3PbI3 photovoltaic devices were fabricated to characterize photovoltaic properties. Current density-voltage...
We investigated an alternative intermittent electrospray co-deposition method for solution processed-organic photovoltaic cells with the graded active layer. This method uses separated two solutions, which contain poly(3-hexylthiophene-2,5-diyl) (P3HT) and phenyl-C61 butyric acid methyl ester (PCBM), are alternatively deposited by using the pulse high voltage. Thus, the P3HT:PCBM blend thin film can...
We study InAs/GaAs quantum dot solar cells exploiting light trapping approaches to enhance the interband light harvesting efficiency of quantum dots. A realistic thin-film structure including a nanostructured anti-reflection coating and a planar reflector is investigated both from the optical and electrical standpoint, based on finite difference time domain electromagnetic simulations and on quantum-dot-aware...
The recent dramatic rise in power conversion efficiencies (PCEs) of perovskite solar cells (PSCs) has triggered intense research worldwide. However, high PCE values have often been reached with poor stability at an illuminated area of typically less than 0.1 square centimeter. We used heavily doped inorganic charge extraction layers in planar PSCs to achieve very rapid carrier extraction, even with...
We present an extensive study of the influence of selective doping on the behavior of quantum dot solar cells, considering both modulation and direct doping approaches. A combined analysis of photoluminescence and photovoltaic behavior at short-circuit and open circuit condition, encompassing different hypothesis in terms of crystal quality of the interdot layers, allows clarifying how doping affects...
Photovoltaic properties of perovskite-type solar cells with polysilane-doped hole transport layers were investigated. Poly(methyl phenylsilane), dimethyl-polysilane and decaphenylcyclopentasilane were doped into 2,2′,7,7′-tetrakis-(N,N-di-pmethoxyphenylamine)-9,9′-spirobifluorene (spiro-OMeTAD) solutions. Conversion efficiencies of the TiO2/CH3NH3PbI3/polysilane-doped spiro-OMeTAD photovoltaic cells...
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