Abstract
Solar cells has been assembly with electrolytes including I−/I−3 redox duality employ polyacrylonitrile (PAN), ethylene carbonate (EC), propylene carbonate (PC), with double iodide salts of tetrabutylammonium iodide (TBAI) and Lithium iodide (LiI) and iodine (I2) were thoughtful for enhancing the efficiency of the solar cells. The rendering of the solar cells has been examining by alteration the weight ratio of the salts in the electrolyte. The solar cell with electrolyte comprises (60% wt. TBAI/40% wt. LiI (+I2)) display elevated efficiency of 5.189% under 1000 W/m2 light intensity. While the solar cell with electrolyte comprises (60% wt. LiI/40% wt. TBAI (+I2)) display a lower efficiency of 3.189%. The conductivity raises with the raising TBAI salt weight ratio and attains the maximum value of 1.7×10−3 S. cm−1 at room temperature with 60% wt. TBAI, and the lower value of ionic conductivity of 5.27×10−4 S. cm−1 for electrolyte with 40% wt. TBAI. The results display that the conductivity rises with rising temperature. This may be attributed to the extending of the polymer and thereby output the free volume. The alteration in ionic conductivity with temperature obeys the Arrhenius type thermally activated process. The differences in activation energy mightily backup the alteration in the electrical conductivity.
Highlights
The development of inexhaustible and clean energy sources is requisite to fulfill future energy needs without draining our petroleum and without contaminating our environment.Subsequently, the minimum setback, dye-sensitized solar cells (DSSCs) are come out as a reasonable alternative to accomplish future energy needs [1]
The aim of the work is to try to boost the efficiency of a DSSC based on gel electrolyte
It can be an offer that the conductivity increases with the increase in tetrabutylammonium iodide (TBAI) salt weight ratio and reaches the highest value of 1.737×10-3 S. cm-1 at 298 K for 60 % of TBAI content, beyond decreases on more additional of TBAI
Summary
The minimum setback, dye-sensitized solar cells (DSSCs) are come out as a reasonable alternative to accomplish future energy needs [1]. The inclusive energy conversation efficiency of a cell, light to electricity, is affected by many agents, including the catalyst utilized in the counter electrode, the transmittance and the conductivity of the conducting substrate, the electrolyte installation, type of dye sensitizer, and distinctive of the TiO2 film. Evolution of gel polymer electrolytes with high iodide-ion conductivity is necessary to enhance the efficiency and lastly to fabricate commercially viable DSSCs since the iodide/triiodide redox couple has been the mostly used redox couple for DSSCs so far [2, 3]. By raising the amount of the short-circuit photocurrent (Jsc) through raised iodide ion conductivity of electrolyte contain the best molar ratio of a double iodide (TBAI with a large cation and LiI with a small alkali cation as the other iodide salt)
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