Dye-Sensitized Solar Cells Based on a Natural Low Cost Halochromic Sensitizer

2011 ◽  
Vol 1286 ◽  
Author(s):  
Michael I. Ibrahim ◽  
Maria J. Bassil ◽  
Umit B. Demirci ◽  
Georges El Haj Moussa ◽  
Mario R. El Tahchi ◽  
...  
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Low Cost ◽  
Ph Effect ◽  
Dye Sensitized Solar Cells ◽  
Open Circuit ◽  
Visible Range ◽  
Dye Sensitized ◽  
Vis Spectroscopy ◽  
Sensitized Solar Cells

ABSTRACTSince their re-introduction as new generation solar cells in 1991, dye-sensitized solar cells (DSSCs) have been studied extensively to improve their efficiency and their stability. Few papers have reported the usage of natural dyes in the fabrication of DSSCs. We are most interested in these dyes being easy to extract, low cost and with tunable absorption. For example, Anthocyanin is extracted from red cabbage and is present in a multitude of colors ranging from red to yellow to violet according to the pH. In this study, two industrial types of titanium dioxide powders, the Degussa P 25 and the Crystal 128 with different particle sizes 21 and 200 nm respectively, were used to prepare DSSCs. The dye used is anthocyanin and its color is varied by varying the pH of the medium. The pH effect on the light absorption of anthocyanin in the visible range and the optical properties of titanium dioxide dyed with anthocyanin and coumarin 102 are investigated using UV-Vis spectroscopy. The open-circuit voltage of all the samples is tested and it if found out that it is dependant on the dye color.

scholarly journals Piperidine-Substituted Perylene Sensitizer for Dye-Sensitized Solar Cells

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Joe Otsuki ◽  
Yusho Takaguchi ◽  
Daichi Takahashi ◽  
Palanisamy Kalimuthu ◽  
Surya Prakash Singh ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Dye Sensitized Solar Cells ◽  
Photocurrent Density ◽  
Open Circuit ◽  
Visible Range ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

We have prepared a novel piperidine-donor-substituted perylene sensitizer, PK0002, and studied the photovoltaic performance in dye-sensitized solar cells (DSSCs). Physical properties and photovoltaic performance of this new perylene derivative PK0002 are reported and compared with those of unsubstituted perylene sensitizer, PK0003. PK0002, when anchored to nanocrystalline TiO2 films, achieves very efficient sensitization across the whole visible range extending up to 800 nm. The incident photon-to-current conversion efficiency (IPCE) spectrum was consistent with the absorption spectrum and resulted in a high short-circuit photocurrent density (Jsc) of 8.8 mA cm-2. PK0002 showed higher IPCE values than PK0003 in the 520–800 nm region. Under standard AM 1.5 irradiation (100 mW cm-2) and using an electrolyte consisting of 0.6 M dimethylpropyl-imidazolium iodide, 0.05 M I2, 0.1 M LiI, and 0.5 M tert-butylpyridine in acetonitrile, a solar cell containing sensitizer PK0002 yielded a short-circuit photocurrent density of 7.7 mA cm-2, an open-circuit photovoltage of 0.57 V, and a fill factor of 0.70, corresponding to an overall conversion efficiency of 3.1%.

scholarly journals Improved Performance for Dye-Sensitized Solar Cells Using a Compact TiO2Layer Grown by Sputtering

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Hung-Chih Chang ◽  
Ming-Jenq Twu ◽  
Chun-Yao Hsu ◽  
Ray-Quen Hsu ◽  
Chin-Guo Kuo
Keyword(s):  
Solar Cells ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Optical Transmittance ◽  
Open Circuit ◽  
Dye Sensitized ◽  
Vis Spectroscopy ◽  
Ito Glass ◽  
Sensitized Solar Cells ◽  
Fto Glass

This work determines the effect of compact TiO2layers that are deposited onto fluorine-doped tin oxide (FTO), to improve the performance of dye-sensitized solar cells (DSSC). A series of compact TiO2layers are prepared using radio frequency (rf) reactive magnetron sputtering. The films are characterized using X-ray diffraction (XRD), atomic force microscopy (AFM), scanning electron microscopy (SEM), and UV-Vis spectroscopy. The results show that when the Ar/O2/N2flow rates are 36 : 18 : 9, the photo-induced decomposition of methylene blue and photo-induced hydrophilicity are enhanced. After annealing at 450°C in an atmosphere ambient for 30 min, the compact TiO2layers exhibit higher optical transmittance. The XRD patterns for the TiO2films for FTO/glass show a good crystalline structure and anatase (101) diffraction peaks, which demonstrate a higher crystallinity than the ITO/glass films. As a result of this increase in the short circuit photocurrent density, the open-circuit photovoltage, and the fill factor, the DSSC with the FTO/glass and Pt counter electrode demonstrates a solar conversion efficiency of 7.65%.

Electrical and photoelectrical measurements on ZnO-Nanowires coated with PEDOT:PSS for Dye-Sensitized Solar Cells

2011 ◽  
Vol 1303 ◽  
Author(s):  
Julia Waltermann ◽  
Kay-Michael Günther ◽  
Stefan Kontermann ◽  
Siegfried R. Waldvogel ◽  
Wolfgang Schade
Keyword(s):  
Solar Cells ◽  
Low Cost ◽  
Transparent Conducting Oxide ◽  
Sol Gel ◽  
Nanowire Array ◽  
Dye Sensitized Solar Cells ◽  
Open Circuit ◽  
Zno Nanowires ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

ABSTRACTDye-sensitized solar cells composed of an n-doped ZnO nanowire array and a p-doped polymer layer appears to be a promising candidate for low-cost production of environment-friendly solar cells. In this work, we investigate hybrid devices consisting of a transparent conducting oxide (TCO) substrate, ZnO-nanowires (ZnO-NW) or a sol-gel prepared ZnO layer, a ruthenium dye (N719) and a PEDOT:PSS or P3HT layer. The dense polycrystalline ZnO layer is able to prevent short circuits, which have a strong effect on the performance of the solar cells. This is demonstrated by the use of only the ZnO layer which improves the open circuit voltage by a factor of 2 and the efficiency by a factor of 1.7 compared to cells with nanowires. That indicates that the system combined with a thin but dense ZnO layer and NW grown on it will show further improvement. Furthermore three different TCO substrates were investigated. Impedance spectroscopy (IS) reveals at least one additional Schottky barrier formed with ZnO:Al substrates. Spectral photovoltage measurements clearly show distinct absorption features correlated with the ZnO and N719 dye.

Processes of Titanium-Dioxide Colloids for Working Electrodes of Dye-Sensitized Solar Cells

2017 ◽  
Vol 865 ◽  
pp. 54-59 ◽  
Author(s):  
Yeong Lin Lai ◽  
Li Wei Chen ◽  
Chih Hung Chen
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Surface Morphology ◽  
Low Cost ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Atomic Force ◽  
Nano Crystalline ◽  
Photovoltaic Characteristics ◽  
Sensitized Solar Cells

New titanium-dioxide (TiO2) colloids composed of nano-crystalline TiO2 and polydimethylsiloxane (PDMS) have been developed for use in the working electrodes of dye-sensitized solar cells (DSSCs). The surface morphology and electrical characteristics of the TiO2 colloid electrodes were studied. The analysis of the surface morphology of the TiO2 colloids was conducted by an atomic force microscope (AFM) and a field-emission scanning electron microscope (FE-SEM). The photovoltaic characteristics of the TiO2 colloids with different compositions were investigated. The TiO2 content of the colloids determined the photovoltaic conversion ability of DSSCs. Colorful colloids were implemented by adding pigments to the TiO2 colloids. The processes of the TiO2 colloids demonstrated the advantages of simple fabrication and low cost. The flexible property of the TiO2 colloids showed great potential for application in flexible optoelectronics.

scholarly journals Henna (Lawsonia inermisL.) Dye-Sensitized Nanocrystalline Titania Solar Cell

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
Khalil Ebrahim Jasim ◽  
Shawqi Al-Dallal ◽  
Awatif M. Hassan
Keyword(s):  
Solar Cells ◽  
Low Cost ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Green Energy ◽  
Dye Sensitized ◽  
Research Activities ◽  
Sensitized Solar Cells

Low-cost solar cells have been the subject of intensive research activities for over half century ago. More recently, dye-sensitized solar cells (DSSCs) emerged as a new class of low-cost solar cells that can be easily prepared. Natural-dye-sensitized solar cells (NDSSCs) are shown to be excellent examples of mimicking photosynthesis. The NDSSC acts as a green energy generator in which dyes molecules adsorbed to nanocrystalline layer of wide bandgap semiconductor material harvest photons. In this paper we investigate the structural, optical, electrical, and photovoltaic characterization of two types of natural dyes, namely, the Bahraini Henna and the Yemeni Henna, extracted using the Soxhlet extractor. Solar cells from both materials were prepared and characterized. It was found that the levels of open-circuit voltage and short-circuit current are concentration dependent. Further suggestions to improve the efficiency of NDSSC are discussed.

scholarly journals Hibiscus Leachate Dye-Based Low-Cost and Flexible Dye-Sensitized Solar Cell Prepared by Screen Printing

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2748
Author(s):  
Congjun Cao ◽  
Tianning Yang ◽  
Guangxue Chen
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Screen Printing ◽  
Low Cost ◽  
Dye Sensitized Solar Cells ◽  
Open Circuit ◽  
Dye Sensitized Solar Cell ◽  
Counter Electrodes ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Although the price of dye-sensitized solar cells is lower than other solar cells, they still contain some high-cost materials, such as transparent conductive substrates, dyes (ruthenium dyes, organic dyes, etc.), and platinum counter electrodes. To solve this problem, a dye-sensitized solar cell based on hibiscus leaching solution and carbon black–silver electrodes was prepared by screen printing. The prepared low-cost dye-sensitized solar cells were flexible. The open-circuit voltage (Voc) of the obtained dye-sensitized solar cell is 0.65 V, the current density (Jsc) is 90 μA/cm², and the fill factor (FF) is 0.241.

POTENTIAL EVALUATION OF YELLOW COTTON (COCHLOSPERMUM REGIUM) PIGMENTS FOR DYE SENSITIZED SOLAR CELLS APPLICATION

2020 ◽  
pp. 16-21
Author(s):  
PHITCHAPHORN KHAMMEE ◽  
YUWALEE UNPAPROM ◽  
UBONWAN SUBHASAEN ◽  
RAMESHPRABU RAMARAJ
Keyword(s):  
Solar Cells ◽  
Low Cost ◽  
Dye Sensitized Solar Cells ◽  
Photoelectric Conversion Efficiency ◽  
Photoelectric Conversion ◽  
Plant Materials ◽  
Natural Pigments ◽  
Dye Sensitized ◽  
Study Results ◽  
Sensitized Solar Cells

Recently, dye-sensitized solar cells (DSSC) have concerned significant attention attributable to their material preparation process, architectural and environmental compatibility, also low cost and effective photoelectric conversion efficiency. Therefore, this study aimed to use potential plant materials for DSSC. This research presents the extraction of natural pigments from yellow cotton flowers (Cochlospermum regium). In addition, the natural pigments were revealed that outstanding advantages, including a wide absorption range (visible light), easy extraction method, safe, innocuous pigments, inexpensive, complete biodegradation and ecofriendly. Methanol was used as a solvent extraction for the yellow cotton flower. The chlorophylls and carotenoid pigments extractions were estimated by a UV-visible spectrometer. The chlorophyll-a, chlorophyll-b, and carotenoid yield were 0.719±0.061 µg/ml, 1.484±0.107 µg/ml and 7.743±0.141 µg/ml, respectively. Thus, this study results suggested that yellow cotton flowers containing reasonable amounts appealable in the DSSC production.

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