Name of Participant: Dr. Ismudiati Puri Handayani
Name of Presenter: Dhika Marlia
Email: iphandayani@telkomuniversity.ac.id
Phone: 081285658967
Address: Engineering Physics, , Jawa Barat, Indonesia
Job: Lecturer
Participant ID : MST43
Mode of Presenter (Requested): Oral Presenter
Paper Title: THE EFFECT OF MICRO SIZED GRAPHITE INSERTION ON LIGHT ABSORPTION AND OUTPUT OF TiO2 BASED SOLAR CELL
Scope/Category: Materials Science and Technology
Mode of Presenter (Given) : Oral Presenter
Abstract

TThe TiO2 based solar cells researches have attracted a lot of attention due to the simple fabrication process and relatively low production cost. However, this type of solar cell has the disadvantage due to its large band gap of 3,1 eV which generates  low  sun light absorption. To overcome this problem, the TiO2 is usually incorporated with die or other  nanoparticles. In this study, micro-sized graphite was inserted into TiO2 solar cells using the doctor blade and spin-coating methods. The morphology and the effect of graphite insertion on TiO2 to the absorption spectrum are characterized by using scanning electron microscopy and UV-Vis, respectively. Meanwhile, the efficiency of solar cell is determined from the I-V curve characterization. Generally the I-V curve characteristics is affected by the mass of graphite insertion, Even though  the observed highest efficiency is 0.052 %,  the graphite insertion is found to increase the light absorption about 75 % when 0.4 gram graphite is inserted to 0.7  gram TiO2 and deposited using doctor blade method.  Furthermore, the I-V curve characteristics and efficiency can be modified by depositing the sample using spin coating method which tends to produce higher open circuit voltage and smaller short circuit method. A 350 mV open circuit voltage is observed for 1000 rpm spin coating. A higher efficiency is obtained for smaller rpm.  This study shows how simple graphite insertion affects the light absorption of TiO2 based solar cell. More investigation to increase the short circuit current is necessary to produce higher solar cell efficiency. 

 

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