2018-Sustainable Industrial Processing Summit
SIPS2018 Volume 8. Composite, Ceramic, Nanomaterials and Mathematics

Editors:F. Kongoli, M. de Campos
Publisher:Flogen Star OUTREACH
Publication Year:2018
Pages:184 pages
ISBN:978-1-987820-96-6
ISSN:2291-1227 (Metals and Materials Processing in a Clean Environment Series)
CD-SIPS2018_Volume1
CD shopping page

    Applications of Microsphere Monolayers on Solar Cells and LEDs

    Chia-Hua Chan1; Chii-Chang Chen1;
    1NATIONAL CENTRAL UNIVERSITY, Taoyuan, Taiwan;
    Type of Paper: Regular
    Id Paper: 278
    Topic: 18

    Abstract:

    Thus far, solar cells are the main component for efficiently converting energy from the sun to electricity. To generate light from electric energy to the optical energy, LEDs are the main devices. The light reflection of the optical interface in these two devices is the main barrier to enhance the efficiency of the devices.
    In this study, we demonstrate a cost-effective method of depositing anti-reflection coatings on glass [1], GaAs [2], sapphire [3] and GaN wafers [4]. The anti-reflection layers are formed by monolayer of microspheres. The deposition is realized by dip coating method. For GaN LEDs, the microspheres can enhance the external efficiency (the output coupling of the light). The microspheres deposited on sapphire before the crystal growth can ameliorate the crystal quality of the GaN to improve the electric property of the GaN LED. The coating is also used on the glass to enhance the transmission of the light at the interface in the OLEDs. The microspheres deposited on GaAs-based solar cell can enhance the transmission of the light into the materials to improve the efficiency.
    We demonstrate theoretically and experimentally the concept and the devices using the monolayer of the microspheres. We have developed a novel technique to deposit the monolayer of microspheres on any flat wafers without the limit of the wafer size. We will show the monolayers of microspheres on 2-inch sapphire wafer and 4-inch silicon wafer.

    Keywords:

    Nanoparticles; Nanotechnology; Silica;

    References:

    [1] Chia-Hua Chan, Alexis Fischer, Amanda Martinez-Gil, Philippe Taillepierre, Chien-Chieh Lee, Song-Lin Yang, Chia-Hung Hou, Hung-Ta Chien, Dong-Po Cai, Kuei-Chu Hsu, Chii-Chang Chen, "Anti-reflection layer formed by monolayer of microspheres," Appl. Phys. B. vol. 100, p.547, 2010.
    [2] Te-Hung Chang, Pei-Hsuan Wu, Sheng-Hui Chen, Chia-Hua Chan, Cheng-Chung Lee, Chii-Chang Chen, Yan-Kuin Su, "Efficiency Enhancement in GaAs Solar Cells Using Self-assemble Microsphere," Opt. Express. vol. 17, p. 6519, 2009.
    [3] Chia-Hung Hou , Shao-Ze Tseng , Chia-Hua Chan, Tsing-Jen Chen , Hung-Ta Chien , Fu-Li Hsiao , Hua-Kung Chiu , Chien-Chieh Lee , Yen-Ling Tsai , Chii-Chang Chen*, "Output power enhancement of light-emitting diodes via two-dimensional hole arrays generated by a monolayer of microspheres," Appl. Phys. Lett. Vol. 95, p. 133105, 2009..
    [4] Guan-Ting Chen, Jen-Inn Chyi*, Chia-Hua Chan, Chia-Hung Hou, Chii-Chang Chen, Mao-Nan Chang, "Crack-free GaN grown on AlGaN/(111)Si micropillar array fabricated by polystyrene microsphere lithography," Appl. Phys. Lett. vol. 91, p. 261910, 2007.
    [5] Chia-Hua Chan, Chia-Hung Hou, Chih-Kai Huang, Tsing-Jen Chen, Shao-Ze Tseng, Hung-Ta Chien, Cheng-Huang Kuo, Kuo-Huang Hsieh, Yen-Ling Tsai, Kuei-Chu Hsu and Chii-Chang Chen*, "Patterning periodical motif on substrates by monolayer of microspheres: Application on GaN LEDs," Jpn. J. Appl. Phys. vol. 48, p. 020212, 2009.

    Cite this article as:

    Chan C and Chen C. (2018). Applications of Microsphere Monolayers on Solar Cells and LEDs. In F. Kongoli, M. de Campos (Eds.), Sustainable Industrial Processing Summit SIPS2018 Volume 8. Composite, Ceramic, Nanomaterials and Mathematics (pp. 89-90). Montreal, Canada: FLOGEN Star Outreach