Evaluation of the limiting factors affecting large-sized, flexible, platinum-free dye-sensitized solar cells performance: a combined experimental and equivalent circuit analysis

2018 ◽  
Vol 29 (11) ◽  
pp. 9621-9634 ◽  
Author(s):  
D. A. Chalkias ◽  
A. I. Laios ◽  
A. Petala ◽  
G. C. Papanicolaou
Keyword(s):  
Solar Cells ◽  
Equivalent Circuit ◽  
Dye Sensitized Solar Cells ◽  
Circuit Analysis ◽  
Limiting Factors ◽  
Equivalent Circuit Analysis ◽  
Factors Affecting ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

Evaluation of Annealing Effects on TiO2 Nanorod Arrays for Dye-Sensitized Solar Cells by Equivalent Circuit Analysis

2014 ◽  
Vol 609-610 ◽  
pp. 152-158 ◽  
Author(s):  
Mei Rong Sui ◽  
Xiu Quan Gu
Keyword(s):  
Solar Cells ◽  
Equivalent Circuit ◽  
Dye Sensitized Solar Cells ◽  
Equivalent Circuit Model ◽  
Photocurrent Density ◽  
Nanorod Arrays ◽  
Equivalent Circuit Analysis ◽  
Shunt Resistance ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

TiO2 nanorod arrays (NRA) were synthesized via a facile hydrothermal method for preparing the dye-sensitized solar cells (DSSC). It was found that a post-thermal treatment facilitated enhancing the cell efficiency. The cells containing NRs underwent 500 °C annealing exhibited much higher efficiency than those un-sintered ones. Further, the internal resistance analysis was carried out to reveal the mechanism underlying the DSSC performance improvement. Specifically, the equivalent circuit model was employed to derivate the internal resistances, which was consistent with the experimental results. It was found that the sintered cells exhibited a higher series resistance and a lower shunt resistance than the un-sintered ones, suggesting the higher photocurrent density might result from the larger amount of dye loading.

Modeling of an equivalent circuit for dye-sensitized solar cells

2004 ◽  
Vol 84 (13) ◽  
pp. 2433-2435 ◽  
Author(s):  
Liyuan Han ◽  
Naoki Koide ◽  
Yasuo Chiba ◽  
Takehito Mitate
Keyword(s):  
Solar Cells ◽  
Equivalent Circuit ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

scholarly journals Recent Advances in Dye Sensitized Solar Cells

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Umer Mehmood ◽  
Saleem-ur Rahman ◽  
Khalil Harrabi ◽  
Ibnelwaleed A. Hussein ◽  
B. V. S. Reddy
Keyword(s):  
Solar Cells ◽  
Organic Solar Cells ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Factors Affecting ◽  
Dye Sensitized ◽  
Working Principle ◽  
Commercial Applications ◽  
Silicon Based ◽  
Sensitized Solar Cells

Solar energy is an abundant and accessible source of renewable energy available on earth, and many types of photovoltaic (PV) devices like organic, inorganic, and hybrid cells have been developed to harness the energy. PV cells directly convert solar radiation into electricity without affecting the environment. Although silicon based solar cells (inorganic cells) are widely used because of their high efficiency, they are rigid and manufacturing costs are high. Researchers have focused on organic solar cells to overcome these disadvantages. DSSCs comprise a sensitized semiconductor (photoelectrode) and a catalytic electrode (counter electrode) with an electrolyte sandwiched between them and their efficiency depends on many factors. The maximum electrical conversion efficiency of DSSCs attained so far is 11.1%, which is still low for commercial applications. This review examines the working principle, factors affecting the efficiency, and key challenges facing DSSCs.

Highly Efficient Dye-sensitized Solar Cells

2011 ◽  
Vol 1327 ◽  
Author(s):  
Liyuan Han ◽  
Ashraful Islam
Keyword(s):  
Solar Cells ◽  
Equivalent Circuit ◽  
Electrochemical Impedance ◽  
Short Circuit ◽  
Dye Sensitized Solar Cells ◽  
Equivalent Circuit Model ◽  
Alkyl Substituent ◽  
Circuit Model ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

ABSTRACTThe present paper discusses the principle of dye-sensitized solar cells (DSCs) in terms of equivalent circuit model and the key issues to improve the device efficiency. Equivalent circuit model is proposed following analysis by electrochemical impedance spectroscopy of the voltage dependence of the internal resistance elements of DSCs. The influence of these elements upon cell performance in areas such as short circuit current density (Jsc), open circuit voltage (Voc), and fill factor (FF) was examined based on the equivalent circuit. Efficient sensitization of nanocrystalline TiO2 film was observed across the whole visible range and into the near-IR region as far as 1000 nm with a new panchromatic substituted β-diketonato Ru(II)-terpyridine dye (HIG1). Introduction of bulky alkyl substituent group in a β-diketonato Ru(II)-terpyridine dye (A3) suppress aggregate formation result in an improved performance of DSCs and the performance is independent of the additive added during the dye adsorption process. The haze factor of TiO2 electrodes is a useful index when fabricating light-confined TiO2 electrodes to improve Jsc. It was demonstrated that blocking of bare TiO2 surface with small molecules is an effective way of suppress interfacial charge recombination at the TiO2-dye/electrolyte interface and of improving shunt resistance and Voc. FF was also improved by reduction of the internal series resistance, which is composed of the following three elements: the redox reaction resistance at the platinum counter electrode, the resistance of carrier transport by ions in the electrolyte, and resistance due to the sheet resistance of the transparent conducting oxide. Finally, the highest efficiency scores of 10.4% and 11.1% (aperture illumination area 1.004cm2 and 0.219cm2, respectively) were confirmed by a public test center.

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