Browsing by Keywords "Photovoltaics"
Now showing items 1-15 of 15
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Chemically specific dynamic characterization of photovoltaic and photoconductivity effects of surface nanostructures
(American Chemical Society, 2010)We report characterization of photovoltaic and photoconductivity effects on nanostructured surfaces through light induced changes in the X-ray photoelectron spectra (XPS). The technique combines the chemical specificity ... -
Communication: Enhancement of dopant dependent x-ray photoelectron spectroscopy peak shifts of Si by surface photovoltage
(2011)Binding energies measured by x-ray photoelectron spectroscopy (XPS) are influenced by doping, since electrons are transferred to (p-type) and from (n-type) samples when they are introduced into the spectrometer, or brought ... -
Comparative study of thin film n-i-p a-Si: H solar cells to investigate the effect of absorber layer thickness on the plasmonic enhancement using gold nanoparticles
(Elsevier Ltd, 2015)In this paper, the effect of gold nanoparticles on n-i-p a-Si:H solar cells with different intrinsic layer (i-layer) thicknesses has been studied. 100nm and 500nm i-layer based n-i-p a-Si:H solar cells were fabricated and ... -
Development of photoanodes for performance enhanced dye sensitized solar cells
(Bilkent University, 2015-08)With a raising demand for clean and renewable energy sources in recent decades, dye sensitized solar cell (DSSC), as an efficient and low-cost solar cell technology, have attracted considerable attention and several efforts ... -
Effect of gold nanoparticles size on light scattering for thin film amorphous-silicon solar cells
(Elsevier Ltd, 2014-05)In this work, the effect of gold (Au) nanoparticles on the performance of a-Si:H solar cells is investigated experimentally. The solar cell stack is grown on a highly doped p-type Si wafer and consists of 20nm heavily doped ... -
Improved efficiency of thin film a-Si:H solar cells with Au nanoparticles
(Institute of Electrical and Electronics Engineers Inc., 2013)In this work, the effect of Au nanoparticles on the performance of a-Si:H solar cells is investigated experimentally. Au nanoparticles of 10, 20, 50, 80, 100, 200 and 400 nm are spin coated on ITO before metallization. The ... -
Novel volumetric plasmonic resonator architectures for enhanced absorption in thin-film organic solar cells
(Bilkent University, 2010)There has been a growing interest in decreasing the cost and/or increasing the efficiency of clean renewable energy resources including those of photovoltaic approaches for conversion of sunlight into electricity. Today, ... -
Optically thin composite resonant absorber at the near-infrared band: A polarization independent and spectrally broadband configuration
(Optical Society of American (OSA), 2011)We designed, fabricated, and experimentally characterized thin absorbers utilizing both electrical and magnetic impedance matching at the near-infrared regime. The absorbers consist of four main layers: a metal back plate, ... -
Phonon-assisted nonradiative energy transfer from colloidal quantum dots to monocrystalline bulk silicon
(IEEE, 2012)Silicon is one of the most dominant materials in photovoltaics. To increase optical absorption of silicon solar cells, colloidal quantum dots (QDs) have been proposed as a good sensitizer candidate owing to their favorably ... -
Plasmonically enhanced hot electorn based optoelectronic devices
(Bilkent University, 2015-06)Hot electron based optoelectronic devices have been regarded as cost-e ective candidates to their conventional counterparts. The efficiency of conventional optoelectronic devices that rely on semiconductor photo-absorbers ... -
Plasmonically enhanced hot electron based photovoltaic device
(Optical Society of American (OSA), 2013)Hot electron photovoltaics is emerging as a candidate for low cost and ultra thin solar cells. Plasmonic means can be utilized to significantly boost device efficiency. We separately form the tunneling metal-insulator-metal ... -
Semiconductor thin film based metasurfaces and metamaterials for photovoltaic and photoelectrochemical water splitting applications
(WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2019)In both photovoltaic (PV) and photoelectrochemical water splitting (PEC‐WS) solar conversion devices, the ultimate aim is to design highly efficient, low cost, and large‐scale compatible cells. To achieve this goal, the ... -
Semiconductor-less photovoltaic device
(IEEE, 2013)We demonstrate a novel semiconductor-less photovoltaic device and investigate the plasmonic effects on this device structure. The device is made of metal and dielectric layers and the operation is based on hot carrier ... -
State of the art and prospects for Halide Perovskite nanocrystals
(American Chemical Society, 2021-06-17)Metal-halide perovskites have rapidly emerged as one of the most promising materials of the 21st century, with many exciting properties and great potential for a broad range of applications, from photovoltaics to optoelectronics ... -
π-Conjugated nanostructured materials: preparation, properties and photonic applications
(Royal Society of Chemistry, 2019)This article reviews recent advances in π-conjugated nanostructures based on conjugated oligomers and polymers, focusing on their preparation, energy transfer abilities, optoelectronic and laser applications, and photophysical ...
