INDEPENDENT GROWTH OF LARGE SCALE CdS NANOROD ARRAYS ON DIFFERENT INTERFACES WITH EFFICIENT PHOTOELECTRICAL PERFORMANCE

Large-scale CdS nanorod arrays have been prepared directly by a simple one-step and non-template magnetron sputtering method on different substrates. Parallel and uniform CdS nanorods with diameters ∼ 70 nm were self-assembled with (00l) orientation regardless of the substrate. The CdS nanorod arrays showed high open-circuit photovoltage, short-circuit photocurrent intensity and excellent photosensitivity properties with a switching "ON/OFF" ratio as high as 60. This study provides a simple strategy to grow CdS nanorod arrays without the constraints introduced by the substrate and opens a new potential for the application of CdS nanorod arrays in photodetectors and nanostructured solar energy conversion devices.

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Thiocyanate Free Ruthenium(II) Complexes for Dye Sensitized Solar Cells (DSSCs)

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.382.369 ◽

2018 ◽

Vol 382 ◽

pp. 369-373

Author(s):

Usana Mahanitipong ◽

Preeyapat Prompan ◽

Rukkiat Jitchati

Keyword(s):

Solar Cells ◽

Short Circuit ◽

Dye Sensitized Solar Cells ◽

Visible Region ◽

Photocurrent Density ◽

Open Circuit ◽

Dye Sensitized ◽

Ligand Charge Transfer ◽

Sensitized Solar Cells ◽

Open Circuit Photovoltage

The four thiocyanate free ruthenium(II) complexes; [Ru(N^N)2(C^N)]PF6were synthesized and characterized for dye sensitized solar cells (DSSCs). The results showed that the broad absorptions covered the visible region from metal to ligand charge transfer (MLCT) were obtained with the main peaks at 560, 490 and 400 nm. The materials were studied DSSC performance under standard AM 1.5. Compound PP1 showed the power conversion efﬁciency (PCE) at 3.10%, with a short-circuit photocurrent density (Jsc) of 7.99 mA cm-2, an open-circuit photovoltage (Voc) of 563 mV and a high ﬁll factor (ff) of 0.690.

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Fabrication and I-V Characteristics of Nanocrystalline Titania Electrode Sensitized by Zinc Phthalocyanine

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.326-328.365 ◽

2006 ◽

Vol 326-328 ◽

pp. 365-368 ◽

Cited By ~ 1

Author(s):

Yu Qiao Wang ◽

Chun Ping Liu ◽

Kang Li ◽

Yue Ming Sun

Keyword(s):

Lauric Acid ◽

Short Circuit ◽

Transparent Conducting Oxide ◽

Sol Gel ◽

Photocurrent Density ◽

Open Circuit ◽

Zinc Phthalocyanine ◽

Solar Simulator ◽

Oxide Substrate ◽

Open Circuit Photovoltage

TiO2 colloids prepared by sol-gel method were autoclaved and then deposited onto a transparent conducting oxide substrate by screen-printing. The TiO2 films electrode was characterized by XRD, SEM, AFM and Alpha-Step profilometer and then sensitized by zinc phthalocyanine (ZnPc), 2,9,16,23-tetracarboxy zinc phthalocyanine (ZnTCPc) and ZnTCPc/lauric acid respectively. Photocurrent density (I) and photovoltage (V) of the electrode were measured with the solar simulator. The ZnTCPc-sensitized electrode was found the best performance with the short-circuit photocurrent density (Isc) 16.66 3A/cm2, the open-circuit photovoltage (Voc) 277.9 mV and the fill factor (FF) 0.39. And the ZnPc-sensitized electrode was found the worst performance with Voc 114.2 mV, Isc 2.26 3A/cm2 and FF 0.31. It was also found that lauric acid promoted Voc of the the ZnTCPc sensitized system.

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Natural Chlorophyll-Sensitized Nanocrystalline TiO2 as Photoanode of a Hybrid Photoelectrochemical Biofuel Cell

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.496.399 ◽

2012 ◽

Vol 496 ◽

pp. 399-402 ◽

Cited By ~ 3

Author(s):

Kun Qi Wang ◽

Juan Tang

Keyword(s):

Titanium Dioxide ◽

Transport Process ◽

Short Circuit ◽

Electrical Energy ◽

Open Circuit ◽

Biofuel Cell ◽

Maximum Power Density ◽

Photoelectrochemical Biofuel Cell ◽

Pt Black ◽

Open Circuit Photovoltage

A photoelectrochemical biofuel cell (PEBFC) generating electrical energy directly from sunlight and biomass was investigated. In this paper, the PEBFC had a natural chlorophyll-sensitized titanium dioxide (TiO2) film photoanode and Pt black cathode. The electron transport process of the PEBFC was described. The performances of the PEBFC were obtained by photocurrent-photovoltage characteristic curves. The open-circuit photovoltage (Voc), the short-circuit photocurrent (Isc) and the maximum power density (Pmax) is 0.53V, 1.000 μAcm-2 and1.1520 μWcm-2 at 0.37 V, respectively. The incident photo-to-current efficiency (IPCE) is 8.4% at 380 nm.

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Magnetron Sputtering for II-VI Solar Cells: Thinning the CdTe

MRS Proceedings ◽

10.1557/proc-1165-m09-01 ◽

2009 ◽

Vol 1165 ◽

Cited By ~ 14

Author(s):

Victor V. Plotnikov ◽

Anthony C. Vasko ◽

Alvin D. Compaan ◽

Xiangxin Liu ◽

Kristopher A. Wieland ◽

...

Keyword(s):

Solar Cells ◽

Magnetron Sputtering ◽

Physical Vapor Deposition ◽

Film Growth ◽

Short Circuit ◽

Scale Up ◽

Good Control ◽

Short Circuit Current ◽

Open Circuit ◽

Plasma Properties

AbstractMagnetron sputtering (MS) of CdTe and related II-VI materials facilitates low energy ion and electron bombardment that promotes good film growth at substrate temperatures well below those needed for other physical vapor deposition methods. MS also provides good control of deposition rates while allowing scale-up to large areas. In this paper we review the use of MS for deposition of polycrystalline thin films of CdS, CdTe and related materials for solar cells with a focus on reducing the thickness. We relate the deposition conditions and plasma properties determined by Langmuir probe measurements to some of the materials properties of the films through spectroscopic ellipsometry and high resolution electron microscopy. For cells with CdTe layers from 0.35 to 2.5 μm, we have done a first-order optimization of chloride treatment conditions and back contact structure. We discuss the influence of CdTe thickness and post-deposition processing on the efficiency, open-circuit voltage, short-circuit current, and fill factor and show that 10% efficient cells can be fabricated with 0.5 μm of CdTe.

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Photovoltaic Effects of Bismuth Ferrite and Nd-Doped Barium Titanate Thin Films Prepared by Sol-Gel Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.787.347 ◽

2014 ◽

Vol 787 ◽

pp. 347-351 ◽

Cited By ~ 1

Author(s):

Chun Lin Fu ◽

Wei Cai ◽

Ze Bin Lin ◽

Wei Hai Jiang

Keyword(s):

Thin Films ◽

Barium Titanate ◽

Short Circuit ◽

Bismuth Ferrite ◽

Power Conversion ◽

Sol Gel ◽

Photocurrent Density ◽

Open Circuit ◽

Doped Barium Titanate ◽

Open Circuit Photovoltage

Ferroelectric is a great potential material as new solar cells, light driver and optical sensor because of its anomalous photovoltaic effect. Bismuth ferrite and Nd-doped barium titanate thin films were prepared via sol–gel spin-coating method in the present study. The experimental results show that substitution of Nd3+ ions for Ba2+ on A sites leads to the decrease of band gap, and the short circuit photocurrent density, open circuit photovoltage and power conversion efficiency of Nd-doped barium titanate thin films begin to increase and reach the maximum and then decrease as Nd content increases. It has been found that the band gap of bismuth ferrite thin films annealed at 550–650oC was between 2.306 eV and 2.453 eV. The short circuit photocurrent density decreased with the rise of annealing temperature, and the open circuit photovoltage and the power conversion efficiency of bismuth ferrite thin films annealed at 550oC were higher than the thin films annealed at higher temperature.

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Performance of Air-Stable Cs2SnI6 Perovskite as Electron Transport Layer in Inverted Bulk Heterojunction Solar Cell

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.860.28 ◽

2020 ◽

Vol 860 ◽

pp. 28-33

Author(s):

Rany Khaeroni ◽

Herman ◽

Priastuti Wulandari

Keyword(s):

Solar Cells ◽

Solar Cell ◽

Electron Transport ◽

Chemical Process ◽

Large Scale ◽

Bulk Heterojunction ◽

Short Circuit ◽

Open Circuit ◽

Transport Layer ◽

Electron Transport Layer

In recent years, perovskite material has been extensively studied due to its unique physical properties and promising application in the third generation of solar cells. In particular, Sn-based perovskite has been considered to replace Pb-based perovskite because of the toxic effects and it can lead to other serious problems related to the environment. Cs2SnI6 perovskite has been known to be synthesized in a simple chemical process and it can be produced on a large scale. Moreover, this material is also oxygen and moisture stable due to the high oxidation state of tin. In this study, we synthesize air-stable Cs2SnI6 perovskite by the use of the wet chemical process at room temperature. Next, we attempt to fabricate the inverted bulk heterojunction solar cells incorporated Cs2SnI6 as electron transport layer in the configuration of ITO/ZnO/Cs2SnI6/P3HT:PCBM/PEDOT:PSS/Ag to improve device performance. The Cs2SnI6 perovskite shows an Fm-3m space group with a cubic lattice parameter of 11.62Å confirmed by X-Ray Diffraction (XRD) measurement, while UV-Vis measurement indicates this type of perovskite has direct band gap ~3.1 eV. The fabricated solar cell device reveals the enhancement in current density at short circuit condition (Jsc) from 64.69 mA/cm2 to 77.02 mA/cm2 with the addition of 2.25 mg/ml Cs2SnI6 along with the enhancement of power conversion efficiency (PCE) from 7.05% to 9.75% as characterized by J-V measurement. In our case, the voltage at open circuit condition (Voc) of the device does not perform significant improvement. Besides, it is found that the solar cell devices are quite stable even after exposure in the air for six weeks after fabrication, as indicated by PCE performance.

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On the importance of the MIS junction to the photovoltaic properties of ITO/TPD/Alq3/Al electroluminescent devices

Canadian Journal of Physics ◽

10.1139/cjp-2012-0113 ◽

2013 ◽

Vol 91 (1) ◽

pp. 60-63

Author(s):

P.P. Ferguson ◽

S. Gauvin ◽

N. Beaudoin

Keyword(s):

Short Duration ◽

Short Circuit ◽

Open Circuit ◽

Photovoltaic Properties ◽

Metal Insulator ◽

Insulating Layer ◽

Electroluminescent Devices ◽

Semiconductor Junction ◽

Organic Electroluminescent ◽

Open Circuit Photovoltage

Organic electroluminescent devices with an ITO/TPD/Alq3/Al structure are fabricated and tested for their photovoltaic properties. To produce an open-circuit photovoltage, a conditioning is required. Here, the conditioning is exposing the device to air for a short duration. Without this conditioning, the device produces a short-circuit photocurrent with practically no open-circuit photovoltage. Calculations and fits to the photovoltaic data show that this observation could be attributed to the formation of a metal–insulator–semiconductor junction between the Alq3 and the Al, where an insulating layer is created by this conditioning.

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Performance Degradation of Dye-Sensitized Solar Cells Induced by Electrolytes

Advances in Materials Science and Engineering ◽

10.1155/2012/902146 ◽

2012 ◽

Vol 2012 ◽

pp. 1-4 ◽

Cited By ~ 6

Author(s):

Ru-Yuan Yang ◽

Huang-Yu Chen ◽

Fu-Der Lai

Keyword(s):

Short Circuit ◽

Dye Sensitized Solar Cells ◽

Short Circuit Current ◽

Short Circuit Current Density ◽

Open Circuit ◽

Dye Sensitized ◽

Oxidation Reduction ◽

Oxidation Reduction Potential ◽

Sensitized Solar Cells ◽

Open Circuit Photovoltage

We investigated the change of the electric characteristics in dye-sensitized solar cell (DSSC) when the electrolyte has been injected and measured initially and lately for a period of time. It was found that the short-circuit current density decreased from 9.799 mA/cm2to 7.056 mA/cm2and the fill factor increased from 0.406 to 0.559 when the cell had stood for an hour, while the open-circuit photovoltage did not change due to fixed difference between the Fermi level of TiO2and the oxidation-reduction potential of electrolyte. The results can be explained by using the variation of the series resistance in the equivalent circuit of the DSSC.

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A Solar Cell Made by a Hybrid Film of P3HT and Cubic-Like PbS

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.479-481.166 ◽

2012 ◽

Vol 479-481 ◽

pp. 166-169

Author(s):

Peng Wang ◽

Li Bo Fan ◽

Zhen Hua Zhang ◽

Yan Lei ◽

Yan Ge Zhang ◽

...

Keyword(s):

Solar Cell ◽

Large Scale ◽

Near Infrared ◽

Hybrid Film ◽

Short Circuit ◽

Short Circuit Current ◽

Open Circuit ◽

Special Treatment ◽

X Ray Diffraction ◽

Ft Ir

Cubic-like lead sulfide (PbS) films were in situ fabricated on lead (Pb) foil on a large scale by solvothermal method. Ethanol and ethylenediamine were used as the solvent. The films were characterized by X-ray diffraction (XRD), Scanning electron microscopy (SEM), absorption and the Fourier transformation-infrared (FT-IR) spectra. A solar cell was made by the hybrid film of P3HT and cubic-like PbS. The solar cells are photosensitive in a large spectral range (visible and near infrared regions). The cell with the area of 0.20 cm2 without any special treatment has shown the values of open-circuit voltage (Voc) of 250 mV and short circuit current (Jsc) of 0.01 mA/cm2 with the efficiency of 0.01 % and the fill factor (FF) is 0.36 under illumination intensity of 100 mW/cm2.

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