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All Journal Makara Journal of Technology
Alia Azmi, Fatin Farisha
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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Study of ZnO Nanospheres Fabricated via Thermal Evaporation for Solar Cell Application Alia Azmi, Fatin Farisha; Sahraoui, Bouchta; Muzakir, Saifful Kamaluddin
Makara Journal of Technology Vol. 23, No. 1
Publisher : UI Scholars Hub

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Abstract

A solar cell is a device that absorbs light energy to generate electrical energy. A typical example of a solar cell is the quantum dot solar cell (QDSC), which consists of three main components: (i) fluorophore: the component that absorbs light and generates excited state electrons and holes, (ii) photoelectrode: the component that transports the excited state electron and prevents recombination of excited state electrons and holes, and (iii) electrolyte: the component that re-plenishes the vacancy left by the excited electron in the hole. Despite the increasing number of research in the QDSC field, to date, a device with significant photovoltaic efficiency has not been developed. In this study, the mechanism of electron transport in a zinc oxide (ZnO) photoelectrode was investigated. Two ZnO layers were fabricated using thermal evaporation method at different vacuum pressures (5 × 10-4 and 5 × 10-5 Torr). Two solar cells were fabricated using ZnO as photoelectrode, lead sulphide as fluorophore, and a mixture of carboxymethyl cellulose and polyvinyl alcohol as electrolyte. The cell which utilized the ZnO fabricated under 5 × 10-5 Torr showed the highest efficiency ( = 0.98%), with fill factor = 22.07%, short circuit current = 2.85 mA/m2, and open circuit voltage = 80.719 mV.
Co-Authors Muzakir, Saifful Kamaluddin Sahraoui, Bouchta