Photovoltaic activity in a ZnSe/PEO–chitosan blend electrolyte junction

Abstract

Thin films of ZnSe and PEO-chitosan blend polymer doped with NH 4 I and iodine crystals were prepared to form the two sides of a semiconductor electrolyte junction. ZnSe was electrodeposited on indium tin oxide (ITO) conducting glass. The polymer is a blend of 50 wt% chitosan and 50 wt% polyethylene oxide. The polymer blend was complexed with ammonium iodide (NH 4 I), and some iodine crystals were added to the polymer-NH 4 I solution to provide the I − /I 3− redox couple. The room temperature ionic conductivity of the polymer electrolyte is 4.32 × 10 −6 S/cm. The polymer film was sandwiched between the ZnSe semiconductor and an ITO glass to form a ZnSe/polymer electrolyte/ITO photovoltaic cell. The open circuit voltage (V oc ) of the fabricated cells ranges between 200 to 400 mV and the short circuit current between 7 to 10 μA.

Solid state metal-free eosin-Y dye sensitized solar cell based on PVdF-HFP electrolytes: combined effect of surface modified TiO2 and plasticizer on electrochemical and photovoltaic properties

“…The linear increment of ionic conductivity at low weight percentage of salt is due to the large number of free ions. When the amount of salt exceeds 10 wt%, it may increase the viscosity and crystalline domains [63]. These factors might be resisting the free ion movements; hence, the conductivity of the present system has decreased up to 25 % of salt addition.…”

TiO2/Chitosan-NH4I(+I2)-BMII-Based Dye-Sensitized Solar Cells with Anthocyanin Dyes Extracted from Black Rice and Red Cabbage

“…Intensive efforts have been geared towards increasing the conductivity of the polymer electrolytes in order to improve the performance of the solar cells. These efforts include blending of polymers [36][37][38], adding plasticizers [39][40][41] and ionic liquid (IL) [42][43][44] into the polymer electrolyte. Ionic liquids (IL) are nonvolatile and nonflammable materials.…”

Stable Efficient Dye‐Sensitized Solar Cell Using Waste Polyvinyl Chloride (PVC) Derived Porous Carbon as Counter Electrode

“…The dye is then returned to its initial condition by the electrolyte, which is often a solution of an organic solvent or ionic liquid solvent containing the I 3 /I 2 redox system. [3][4][5][6][7] The primary purpose of every solar cell device is to convert solar light energy into electrical energy. Charge separation, charge collection, and light absorption are the three primary operations of DSSCs.…”

“…The dye is then returned to its initial condition by the electrolyte, which is often a solution of an organic solvent or ionic liquid solvent containing the I 3 /I 2 redox system. [ 3–7 ]…”