Effect of the Addition of Ti3+ into TiO2 Film on the Performance of Dye Sensitized Solar Cells

2007 ◽  
Vol 336-338 ◽  
pp. 2337-2339
Author(s):  
Jun Hui Xiang ◽  
Zhi Zhang ◽  
Fu Shi Zhang ◽  
Shoji Kaneko ◽  
Masayuki Okuya ◽  
...  
Keyword(s):  
Solar Cell ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Tio2 Particle ◽  
Dye Molecules ◽  
Dye Sensitized ◽  
First Time ◽  
Sensitized Solar Cells

For the first time, it was found that low-valence additives could be employed to improve the conversion efficiency of dye sensitized solar cell. It was experimentally discovered that by forming nonstoichiometric compound, Ti3+ was located in the lattice of TiO2 film, generating surplus electrons within the film and affecting the morphology of TiO2 particle. The improvement of the conversion efficiency of the solar cell was mainly due to the increase of short circuit current along with the content of Ti3+. The surface of the TiO2 particle became more coarsely after TiCl3 added and the absorbed dye molecules was increased. It was another reason of the improvement of conversion efficiency.

scholarly journals Dye-sensitized solar cells with natural dyes extracted from plant seeds

2014 ◽  
Vol 32 (4) ◽  
pp. 547-554 ◽  
Author(s):  
Hatem El-Ghamri ◽  
Taher El-Agez ◽  
Sofyan Taya ◽  
Monzir Abdel-Latif ◽  
Amal Batniji
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Tio2 Film ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Natural Dyes ◽  
Plant Seeds ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

AbstractThe application of natural dyes extracted from plant seeds in the fabrication of dye-sensitized solar cells (DSSCs) has been explored. Ten dyes were extracted from different plant seeds and used as sensitizers for DSSCs. The dyes were characterized using UV-Vis spectrophotometry. DSSCs were prepared using TiO2 and ZnO nanostructured mesoporous films. The highest conversion efficiency of 0.875 % was obtained with an allium cepa (onion) extract-sensitized TiO2 solar cell. The process of TiO2-film sintering was studied and it was found that the sintering procedure significantly affects the response of the cell. The short circuit current of the DSSC was found to be considerably enhanced when the TiO2 semiconducting layer was sintered gradually.

Improved Carbon Counter Electrodes for Dye Sensitized Solar Cells

2007 ◽  
Vol 31 ◽  
pp. 176-178
Author(s):  
Hyeon Seok Lee ◽  
Heon Yong Lee ◽  
S.Y. Ahn ◽  
K.H. Kim ◽  
J.Y. Kwon
Keyword(s):  
Solar Cells ◽  
Surface Morphology ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Counter Electrodes ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

We fabricated improved carbon counter electrodes to improve conversion efficiency of dye sensitized solar cells (DSSCs). Unlike conventional carbon counter electrodes, we added small quantity of TiO2 nano powder and used chemical sintering methodology developed by Park’s group to make surface morphology of the electrodes to change. Through these methods, we could observe change of surface morphology of carbon electrodes and influences on short circuit current density (JSC) and conversion efficiency.

Properties and Optimization of Photoanode in Dye-Sensitized Solar Cells

2014 ◽  
Vol 602-603 ◽  
pp. 884-887
Author(s):  
Hui Xia Cao ◽  
Ze Zhou ◽  
Xiao Di Li ◽  
Bo Yu Wang ◽  
Yu Lin Zhang ◽  
...  
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Photoelectric Conversion Efficiency ◽  
Process Conditions ◽  
Photoelectric Conversion ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

In order to improve the photoelectric conversion efficiency of dye-sensitized solar cells (DSSC), the photoanode process conditions were optimized in this work. The effects on photoelectric conversion efficiency of three methods were mainly investigated, including magnetron sputtering barrier layer, printing scattering layer and post-treatment with TiCl4. The microstructure of TiO2thin films was measured by scanning electron microscope (SEM). The results showed that porous photoanode benefited to electronic transmission. The photoelectric conversion efficiency and performance of DSSC were measured by I-V testing instrument. The results indicated that the short circuit current and photoelectric conversion efficiency were improved. Finally, the best result was obtained by combining the three optimal conditions. A high photoelectric conversion efficiency of 7.31% was achieved under illumination of simulated AM 1.5 sunlight (100mW/cm2). Compared to the previous result of 5.48%, the improvement of 33.4% was achieved.

scholarly journals Study of the Enhancement of Cell Performance of Dye Sensitized Solar Cells Sensitized With Nephelium lappaceum (F: Sapindaceae)

2013 ◽  
Vol 135 (3) ◽  
Author(s):  
N. T. R. N. Kumara ◽  
Piyasiri Ekanayake ◽  
Andery Lim ◽  
Mohammad Iskandar ◽  
Lim Chee Ming
Keyword(s):  
Solar Cells ◽  
Conversion Efficiency ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Low Ph ◽  
Dye Sensitized ◽  
Nephelium Lappaceum ◽  
Sensitized Solar Cells

We have studied the performance of dye sensitized solar cells sensitized with pigments extracted from the fruit sheath of Nephelium lappaceum (F: Sapindaceae). The pH of the pigment solution used for impregnation was controlled by adding concentrated HCl (50:0.2 v/v). The UV-Vis spectroscopic results revealed that the extract consists of the pigment of Anthocyanin, with an additional absorption peak appearing around 540 nm at a lower pH of the pigment solution. Also the band gap of the pigment was reduced by 1 eV at low pH conditions. The solar cells fabricated with pigment extracted from the fruit sheath of Nephelium lappaceum showed photo-response with the conversion efficiency of 0.26%, with an open-circuit voltage (VOC) of 453 mV, short-circuit current density (ISC) of 1.17 mA cm−2, and fill factor (ff) of 0.48. The conversion efficiency was significantly enhanced when pH of the pigment solution was lowered by adding concentrated HCl. The conversion efficiency of the dye sensitized solar cells (DSSCs) sensitized after HCl treatment of the pigment was increased to 0.56%, with an open-circuit voltage (VOC) of 404 mV, short-circuit current density (ISC) of 2.71 mA cm−2, and fill factor (ff) of 0.35. The HOMO level of the pigment at low pH was shown to be shifted towards more positive values with respect to vacuum level, giving rise to an enhanced DSSC efficiency. The overall efficiency enhancement of the low pH pigment was due to the combined effect of increased UV-Vis absorption and efficient adsorption of dye molecules onto the TiO2 semiconductor surface.

Donor-π-acceptor, triazine-linked porphyrin dyads as sensitizers for dye-sensitized solar cells

2015 ◽  
Vol 19 (01-03) ◽  
pp. 175-191 ◽  
Author(s):  
Ganesh D. Sharma ◽  
Galateia E. Zervaki ◽  
Kalliopi Ladomenou ◽  
Emmanuel N. Koukaras ◽  
Panagiotis P. Angaridis ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Carboxylic Acid ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Orbital Energy ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Two porphyrin dyads with the donor-π-acceptor molecular architecture, namely ( ZnP )-[triazine-gly]-( H 2 PCOOH ) and ( ZnP )-[triazine-Npip]-( H 2 PCOOH ), which consist of a zinc-metalated porphyrin unit and a free-base porphyrin unit covalently linked at their peripheries to a central triazine group, substituted either by a glycine in the former or a N-piperidine group in the latter, have been synthesized via consecutive amination substitution reactions of cyanuric chloride. The UV-vis absorption spectra and cyclic-voltammetry measurements of the two dyads, as well as theoretical calculations based on Density Functional Theory, suggest that they have suitable frontier orbital energy levels for use as sensitizers in dye-sensitized solar cells. Dye-sensitized solar cells based on ( ZnP )-[triazine-gly]-( H 2 PCOOH ) and ( ZnP )-[triazine-Npip]-( H 2 PCOOH ) have been fabricated, and they were found to exhibit power conversion efficiency values of 5.44 and 4.15%, respectively. Photovoltaic measurements (J–V curves) and incident photon to current conversion efficiency spectra of the two solar cells suggest that the higher power conversion efficiency value of the former solar cell is a result of its enhanced short circuit current, open circuit voltage, and fill factor values, as well as higher dye loading. This is ascribed to the existence of two carboxylic acid anchoring groups in ( ZnP )-[triazine-gly]-( H 2 PCOOH ), compared to one carboxylic acid group in ( ZnP )-[triazine-Npip]-( H 2 PCOOH ), which leads to a more effective binding onto the TiO 2 photoanode. Electrochemical impedance spectra show evidence that the ( ZnP )-[triazine-gly]-( H 2 PCOOH ) based solar cell exhibits a longer electron lifetime and more effective suppression of charge recombination reactions between the injected electrons and electrolyte.

IMPROVING STABILITY OF CHLOROPHYLL AS NATURAL DYE FOR DYE-SENSITIZED SOLAR CELLS

2017 ◽  
Vol 80 (1) ◽  
Author(s):  
Zainal Arifin ◽  
Sudjito Soeparman ◽  
Denny Widhiyanuriyawan ◽  
Suyitno Suyitno ◽  
Argatya Tara Setyaji
Keyword(s):  
Current Density ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Natural Dyes ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Natural dyes have attracted much researcher’s attention due to their low-cost production, simple synthesis processes and high natural abundance. However the dye-sensitized solar cells (DSSCs) based natural dyes have higher tendency to degradation. This article reports on the enhancement of performance and stability of dye-sensitized solar cells (DSSCs) using natural dyes. The natural dyes were extracted from papaya leaves by ethanol solvent at a temperature of 50 °C. Then the extracted dyes were isolated and modified into Mg-chlorophyll using column chromatography. Mg-chlorophyll was then synthesized into Fe-chlorophyll to improve stability. The natural dyes were characterized using ultraviolet-visible spectrometry, Fourier transform infrared spectroscopy, and cyclic voltammetry. The performance of DSSCs was tested using a solar simulator. The results showed the open-circuit voltage, the short-circuit current density, and the efficiency of the extracted papaya leaves-based DSSCs to be 325 mV, 0.36 mA/cm2, and 0.07%, respectively. Furthermore, the DSSCs with purified chlorophyll provide high open-circuit voltage of 425 mV and short-circuit current density of 0.45 mA/cm2. The use of Fe-chlorophyll for sensitizing the DSSCs increases the efficiency up to 2.5 times and the stability up to two times. The DSSCs with Fe-chlorophyll dyes provide open-circuit voltage, short-circuit current density, and efficiency of 500 mV, 0.62 mA/cm2, and 0.16%, respectively. Further studies to improve the current density and stability of natural dye-based DSSCs along with an improvement in the anchor between dyes and semiconducting layers are required.

scholarly journals Delineating the enhanced efficiency of carbon nanomaterials including the hierarchical architecture of the photoanode of dye-sensitized solar cells

2020 ◽  
Vol 1 (8) ◽  
pp. 2964-2970
Author(s):  
Venkatesan Srinivasan ◽  
Jagadeeswari Sivanadanam ◽  
Kothandaraman Ramanujam ◽  
Mariadoss Asha Jhonsi
Keyword(s):  
Current Density ◽  
Carbon Nanomaterials ◽  
Short Circuit ◽  
Power Conversion ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Hierarchical Architecture ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

The inclusion of CNMs together with TiO2 enhanced the short circuit current density by 31% and power conversion efficiency (PCE) by 46% compared to the CNM-free DSSCs.

Inkjet Printing Technology for Dye-Sensitized Solar Cells

2012 ◽  
Vol 476-478 ◽  
pp. 1767-1770
Author(s):  
Yu Li Lin ◽  
Cheng Yi Hsu ◽  
Chang Lun Tai
Keyword(s):  
Open Circuit Voltage ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Dye Sensitized ◽  
Tio2 Particles ◽  
Ito Glass ◽  
Sensitized Solar Cells ◽  
Pet Substrate

The task of this study is to prepare the TiO2 film electrode for dye-sensitized solar cells (DSSC) on ITO PET substrate using a general jet-printer. The results were compared with that obtained using ITO glass substrate. In this study, the dispersion of TiO2 slurry was manipulated by changing the pH value of the solution to avoid agglomeration of TiO2 particles. The average TiO2 particles used in this study were measured about 130nm. The experimental results show that it has the best performance when the thickness of the TiO2 film was about 10μm. In ITO glass substrate, the measured short circuit current was about 5.03mA, the open circuit voltage was measured to be 0.65V. In ITO-PET substrate, the measured short circuit current was about 2.73mA, the open circuit voltage was measured to be 0.68V.

Effects of Activated Carbon Counter Electrode on Bifacial Dye Sensitized Solar Cells (DSSCs)

2021 ◽  
Vol 1016 ◽  
pp. 863-868
Author(s):  
Tika Erna Putri ◽  
Yuan Hao ◽  
Fadzai Lesley Chawarambwa ◽  
Hyunwoong Seo ◽  
Min Kyu Son ◽  
...  
Keyword(s):  
Solar Cells ◽  
Activated Carbon ◽  
Counter Electrode ◽  
Low Cost ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Short Circuit Current ◽  
Optical Losses ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

The losses of solar cells are consisted of electrical losses and optical losses. Optical losses chiefly reduce the short-circuit current. Here we apply bifacial cell approach to increase light absorption and the short-circuit current of dye sensitized solar cells (DSSCs). We have employed activated carbon (AC) as a very low cost counter electrode, an alternative to Pt counter electrode. Addition of dimethyl sulfoxide (DMSO) and titanium carbonitride (TiCN) to AC increase the efficiency of bifacial DSSC at a mirror angle of from 5.10% to and , respectively. These results indicate that AC has the potential to replace Pt as a very low cost counter electrode of bifacial DSSCs. The bifacial DSSC system using double plane mirrors improve PCE to for Pt counter electrode at a mirror angle of , and for AC counter electrode at a mirror angle of , respectively.

Sign in / Sign up

Export Citation Format

Share Document