(B. MIPA/Sains) Investigation of Transport Mechanism in Spirulina sp thin Films Deposited by Spin Coating to Improve The Efficiency of Generation-4 Organic Solar Cell

Utari, and Purnama, Budi and Wibowo, Atmanto Heru (2012) (B. MIPA/Sains) Investigation of Transport Mechanism in Spirulina sp thin Films Deposited by Spin Coating to Improve The Efficiency of Generation-4 Organic Solar Cell. .

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    Abstract

    Investigation of transport mechanism in spirulina sp thin films deposited by spin coating methods results have successfully carried out. The thin films were grown on the PCB with a certain pattern. In this experiment, two important experiments confirmed that the modification of the energy gap with changes in rotational speed and increasing the number of layers. The changed of the energy gap can be resoned surface modification of the spirulina sp thin films which was clarified by using scanning tunneling microscopy (STM). Confirmation of the number of layers dependence of the energy gap indicated that energy gap decreases linearly with increasing the number of layers. In addition, absorbance value of the samples also increases with the rise of the number layers. When assuming an increase in the number layers also increases the number of charge carriers, these results indicate that the HOMO-LUMO become closer or even overlap each other. Increasing the number layers of N = 1 to N = 7, the energy gap decrease from 1.86 eV to be 1.44 eV. While confirmation of the energy gap variation with rotational speed affirm specific dependency. At first, the energy gap increases with increasing angular velocity up to a certain critical velocity is  = 4000 rpm, after which it remained constant in the energy gap Eg = 1.42 eV. Clarification of changes in the structure of the surface morphology by scanning tunneling microscopy shows that the change of morphological structure of a thin continuous layer into discrete thin layers. Evaluation of the photon energy is transferred into electrical energy through the absorption peak wavelength confirms sensitizing phenomenon is determined by the photon transfer efficiency. However it is dealing with changes in the energy gap due to overlapping HOMO-LUMO and morphological changes in the surface film. Based on this understanding of the structural configuration of thin films typically determine the efficiency of the transfer of photon energy into electrical energy.

    Item Type: Article
    Subjects: Q Science > Q Science (General)
    Divisions: Lembaga Penelitian dan Pengabdian Kepada Masyarakat - LPPM
    Depositing User: Miranda Nur Q. A.
    Date Deposited: 06 May 2014 16:31
    Last Modified: 06 May 2014 16:31
    URI: https://eprints.uns.ac.id/id/eprint/15088

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