Plasmonic enhanced dye−sensitized solar cells with phthaloyl chitosan−based gel polymer electrolyte / Shahan Shah

Shahan , Shah (2023) Plasmonic enhanced dye−sensitized solar cells with phthaloyl chitosan−based gel polymer electrolyte / Shahan Shah. PhD thesis, Universiti Malaya.

	PDF (The Candidate's Agreement) Restricted to Repository staff only Download (159Kb)
	PDF (Thesis PhD) Download (1795Kb)

Abstract

In this work, light absorption improves with the use of plasmonic nanoparticles by photovoltaic (PV) devices. Silver (Ag, 100 nm size), gold (Au, 100 nm in size), copper (Cu, 60−70 nm in size) and platinum (Pt) nanoparticles (NP) added to the titanium dioxide (TiO2) active layer of dye sensitized solar cells (DSSCs) have improved performance. The phthaloyl−chitosan based gel polymer electrolytes (GPEs) containing tetrapropylammonium iodide (TPAI) salt, 1−butyl−3−methylimidazolium iodide (BMII) ionic liquid (IL), tert−butyl pyridine (TBP), guanidine thiocyanate (GuSCN) as additives and ( ) redox couple were used as an ion conducting medium for the DSSCs operation. The highest ionic conductivity 12.69×10−3 S cm−1 was exhibited by the GPE containing 3 wt.% GuSCN. The photocurrent density−photovoltage (J−V) characteristics, intensity modulated photocurrent spectroscopy (IMPS) and intensity modulated voltage spectroscopy (IMVS) were determined. On illuminating with AM1.5 (1000 W m−2) light, DSSCs fabricated with 0 wt.% of NP constructed photoanode has exhibited comparatively low solar cell efficiency (η) of 4.59% with short−circuit current density of 9.90 mA cm−2 and open−circuit voltage of 0.69 V. The same cell also exhibited charge transport time of 17.13 ms and charge recombination time of 36.43 ms. On illuminating with AM1.5 light, the cell with 2 wt.% Ag NP in the photoanode exhibits an η of 6.99 %. The is 14.25 mA cm−2, is 0.71 V and fill factor (FF) is 70%. The DSSC with photoanode containing 2 wt.% Ag NP also exhibits of 7.00 ms and of 87.22 ms. On illumination with AM1.5 light, the cell with 3 wt.% Au NP in the photoanode exhibits an η of 8.54% with of 19.82 mA cm−2, of 0.72 V and FF of 60%. The same cell also exhibited of 7.32 ms and of 115.33 ms. Under the illumination of AM1.5, the DSSC with photoanode containing 3 wt.% of Cu NP exhibits higher η of 7.19% with of 13.35 mA cm−2, of 0.76 V and FF of 71%. The same cell also exhibited the lowest of 2.30 ms and of 143.19 ms. Under the illumination of AM1.5, the DSSC with photoanode containing with 3 wt.% of Pt NP exhibits higher η of 6.54% with of 19.60 mA cm−2, of 0.51 V and FF of 65%.

Actions (For repository staff only : Login required)