KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Author: search.filters.author.Chonsut, Teantong

Search Results

Now showing 1 - 2 of 2
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    An unconventional blade coating for low-cost fabrication of PCDTBT: PC70BM polymer and CH3NH3PbIxCl3-x perovskite solar cells
    (2021-04-01)
    Kaewprajak, Anusit
    ;
    Kumnorkaew, Pisist
    ;
    Lohawet, Khathawut
    ;
    Duong, Binh
    ;
    Chonsut, Teantong
    A low-cost and unconventional blade coating technique, called convective deposition, has been introduced for PCDTBT:PC<inf>70</inf>BM polymer and CH<inf>3</inf>NH<inf>3</inf>PbI<inf>x</inf>Cl<inf>3-x</inf> perovskite solar cell fabrication. With the new technique, only 10–20 microliter droplets per one square inch substrate were used to deposit hole transporting material, as well as photoactive and electron transporting materials, sequentially to create a p-i-n structure solar cell. Thin film deposition and solar cell fabrication from the standard spin coating and the convective deposition were compared. Smaller and better distribution of PC<inf>70</inf>BM domain in the PCDTBT:PC<inf>70</inf>BM film was observed in the film prepared by the convective deposition. Unlike the conventional doctor-blade coating or the spin coating, the film thickness can simply be adjusted by the convective deposition speed. The highest averaged power conversion efficiency (PCE) of 6.34% was obtained from the polymer solar cell prepared by the convective deposition at the coating speed of 750 μm/s compared to 5.60% PCE from the spin coating at the speed of 2500 rpm. For perovskite solar cell, a heating stage was used during the convective deposition of perovskite ink, 10.61% PCE was achieved with the stage temperature of 70 °C and the 2500 μm/s deposition speed. Layer-by-layer deposition with the convective deposition used in this study offers benefits over the standard spin coating by reducing amount of material consumption in the fabrication process and being suitable for low-cost fabrication of other solution-based optoelectronic devices.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Enhanced performance of bulk heterojunction solar cells using double layers deposition of polymer:fullerene derivatives
    (2015-06-23)
    Khantha, Chanitpa
    ;
    Chonsut, Teantong
    ;
    Kaewprajak, Anusit
    ;
    Kumnorkaew, Pisist
    ;
    Wootthikanokkhan, Jatuphorn
    Poly[4,8-bis(2-ethylhexyloxy)benzo[1,2-b:4,5-b′]dithiophene-co-quinoxaline] (PBDTQx) copolymer; to be used as an electron donor in bulk heterojunction (BHJ) polymer solar cell; was synthesized from benzo[1,2-b:4,5-b′]dithiophene and quinoxaline via a Stille coupling reaction. BHJ polymer solar cells based on the ternary blend of PBDTQx; indene-C<inf>60</inf> bisadduct (ICBA) and [6,6]-phenyl-C<inf>71</inf>-butyric-acid-methyl-ester(PC<inf>71</inf>BM) were then fabricated and tested for the power conversion efficiency (PCE) values. From the IV curves; it was found that the open circuit voltage (V<inf>oc</inf>) and current density (J<inf>sc</inf>) of the solar cell increased with the addition of ICBA. This was related to the lowest unoccupied molecular orbital (LUMO) level of ICBA; which is suitable with those of PC<inf>71</inf>BM and PBDTQx. It was also found that PCE of the solar cell can be improved significantly by double layers coating of the active materials (PBDTQx:PC<inf>71</inf>BM:ICBA). The above effect was ascribed to changes in morphology and crystallinity of the active layer.