• Energy Research

Abstract A newly designed back contact dye-sensitized solar cells (BCDSSC) with back contact electrode (BCE) of Ti for electron collection, is placed on the side opposite to side of light irradiation on TiO2 with synthesized organic compound doped poly (ethylene oxide)/poly (vinylidene fluoride)/potassium iodide/Iodine polymer electrolyte was introduced for the application of solar energy to electric energy conversion. The surface morphology of the polymer electrolyte study was carried out by SEM, XRD, DSC, DTA, TGA and it proves that the synthesized organic compounds enhances the amorphous nature of the polymer due to well coordinate with redox couple. The movement of I−/I3− characterized with UV–vis spectroscopy proves of organic compound with Iodine in the redox couple to decrease the sublimation of iodine. The conductivity of polymer/potassium iodide/iodine/organic compound shows high conductivity of 4.9 × 10−4 S cm−1 and it confirms that the importance of synthesized organic compounds in polymer electrolyte. The TiO2/Ti (BCE)/N3dye/PEO/PVdF/Potassium iodide/Iodine/PDSD/Pt compounds yielded an efficiency of 8.9% under illumination of 70 mW cm−2 at A.M. 1.5.

One of the most important tasks in improving supercapacitor (SC) efficiency is the quest for advanced electrode and electrolyte materials. For the first time, we propose using a metal organic frame...

Abstract A new sequence of GLN gel polymer electrolytes incorporated with KI/I2 redox pair and inexpensive organic additives were prepared. Five dissimilar N, O, and S containing organic compounds were used as additives for the application of DSSCs. The assimilation of organic additives into the GLN gel polymer electrolytes is confirmed by FTIR, DSC, XRD, UV–visible and SEM analyses. EIS analysis reveals that there is an increment in the conductivity up to 2.93X10-5 S/cm for SAA organic additive integrated gel polymer electrolyte than other organic additives. This is owing to more electrons donating nature of the SAA molecule which consists of N, S and O atoms together in its structure. The EIS experiment exposes the interfacial study in DSSCs to elucidate the charge transport mechanisms at the interface of photo electrodes and electrolyte medium of the devices. The charge transfer studies show a lower Rpt (685 Ω), higher Rct (1674 Ω) and Cµ (5.702 X 10-6F) values for SAA integrated GLN gel polymer electrolyte. This confirms mitigation of recombination process between TiO2 and I3- ions and also build a shift to Fermi level of TiO2. DFT calculations also confirm the strength and mode of interaction of individual additives adsorbed on TiO2 surfaces. The FMO analysis clearly reveals that functional groups play a vital role in the charge transfer process at interface materials. The N, O and S present in the SAA additive with GLN gel polymer electrolyte improves the PCE up to 5.8% under the sunlight illumination of 100mWcm−2.