Papers by Keyword: Photoelectrochemical Solar Cell

Abstract: The solar cells have been used as most promising device to convert light energy into electrical energy. In this paper authors have attempted to fabricate Photoelectrochemical solar cell with semiconductor electrode using TMDCs. The Photoelectrochemical solar cells are the solar cells which convert the solar energy into electrical energy. The photoelectrochemical cells are clean and inexhaustible sources of energy. The photoelectrochemical solar cells are fabricated using WSe₂ crystal and electrolyte solution of 0.025M I₂, 0.5M NaI, 0.5M Na₂SO₄. Here the WSe₂ crystals were grown by direct vapour transport technique. In our investigations the solar cell parameters like short circuit current (I_sc) and Open circuit voltage (V_oc) were measured and from that Fill factor (F.F.) and photoconversion efficiency (η) are investigated. The results obtained shows that the value of efficiency and fill factor of solar cell varies with the illumination intensities.

Abstract: A photoelectrochemical solar cell with a structure of modified Si nanowire anocle/K₄Fe(CN)₆+ K₃Fe(CN)₆/Pt cathode was prepared and studied. The Si nanowires were first formed by immersing n-Si chip in an etching solution of HF + AgNO₃ and Pd and Ni metals were electrolessly deposited on the surface of Si nanowires. The modified anode was characterized by a scanning electron microscope for the surface and cross section view, and by an X-ray diffractometer for the phase and structure. The properties of the photoelectrochemical solar cell were measured under standard AM 1.5 simulated sunlight (100mW/cm²). The results showed that the total photoelectron conversion efficiency of the photoelectrochemical solar cell can be slightly increased when the Si nanowire anode was deposited with Pd metal, and can be greatly increased when deposited with Ni metal.

Abstract: Highly compact vertical array ZnO nanorods on the FTO coated glass was fabricated for photoelectrochemical cell of FTO/ZnO/electrolyte/platinum. ZnO nanorods were grown on the FTO substrate at room temperature via ammonia assisted rapid hydrolysis process technique. In typical process, ZnO nanorods were characterized by FESEM with vertical array oriented with average diameter and length of 48 nm and 218 nm, respectively. The sample was grown throughout the surface by using four cycle growth process. The photoelectrochemical cell property was studied in dark and under illumination of 100 mWcm^-2 light. The cell exhibits photovoltaic effect with J_SC of 0.22mAcm^-2, V_OC of 0.44 V, and conversion efficiency of 0.03%. Keywords: Vertical array ZnO nanorods, Photoelectrochemical solar cell