title: Pigments from UV-resistant Antarctic bacteria as photosensitizers in Dye Sensitized Solar Cells.
abstract: Here we report the use of pigments produced by UV-resistant Antarctic bacteria as photosensitizers in Dye Sensitized Solar Cells (DSSCs). Pigments were obtained from red and yellow colored psychrotolerant bacteria isolated from soils of King George Island, Antarctica. Based on metabolic characteristics and 16s DNA sequence, pigmented bacteria were identified as Hymenobacter sp. (red) and Chryseobacterium sp. (yellow). Pigments produced by these microorganisms were extracted and classified as carotenoids based on their spectroscopic and structural characteristics, determined by UV-Vis spectrophotometry and infrared spectroscopy (FTIR), respectively. With the purpose of develop green solar cells based on bacterial pigments, the photostability and capacity of these molecules as light harvesters in DSSCs were determined. Absorbance decay assays determined that bacterial carotenoids present high photostability. In addition, solar cells based on these photosensitizers exhibit an open circuit voltage (VOC) of 435.0 [mV] and a short circuit current density (ISC) of 0.2 [mA·cm(-2)] for the red pigment, and a VOC of 548.8 [mV] and a ISC of 0.13 [mA·cm(-2)] for the yellow pigment. This work constitutes the first approximation of the use of pigments produced by non-photosynthetic bacteria as photosensitizers in DSSCs. Determined photochemical characteristics of bacterial pigments, summed to their easy obtention and low costs, validates its application as photosensitizers in next-generation biological solar cells.
authors: Universidad Andres Bello, BioNanotechnology and Microbiology Lab, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, República 239, Santiago, Chile; Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Sergio Livingstone Pohlhammer 1007, Santiago, Chile.
authors: N
authors: N
authors: Órdenes-Aenishanslins
authors: Universidad Andres Bello, BioNanotechnology and Microbiology Lab, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, República 239, Santiago, Chile.
authors: G
authors: G
authors: Anziani-Ostuni
authors: Universidad Andres Bello, BioNanotechnology and Microbiology Lab, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, República 239, Santiago, Chile.
authors: M
authors: M
authors: Vargas-Reyes
authors: Universidad Andres Bello, BioNanotechnology and Microbiology Lab, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, República 239, Santiago, Chile.
authors: J
authors: J
authors: Alarcón
authors: Universidad Andres Bello, BioNanotechnology and Microbiology Lab, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, República 239, Santiago, Chile.
authors: A
authors: A
authors: Tello
authors: Universidad Andres Bello, BioNanotechnology and Microbiology Lab, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias Biológicas, República 239, Santiago, Chile. Electronic address: jose.perez@unab.cl.
authors: J M
authors: JM
authors: Pérez-Donoso
mesh_terms: D000864:Antarctic Regions; D001419:Bacteria / Q000235:genetics / Q000302:isolation & purification / Q000528:radiation effects*; D002338:Carotenoids / Q000737:chemistry; D004396:Coloring Agents / Q000737:chemistry*; D004560:Electricity; D004566:Electrodes; D017319:Photosensitizing Agents / Q000737:chemistry* / Q000378:metabolism; D010858:Pigmentation; D012336:RNA, Ribosomal, 16S / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D017422:Sequence Analysis, DNA; D012993:Solar Energy; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared; D014466:Ultraviolet Rays
chemical_list: D004396:Coloring Agents; D017319:Photosensitizing Agents; D012336:RNA, Ribosomal, 16S; D002338:Carotenoids
keywords: Antarctic bacteria; Bacterial pigments; Carotenoids; Dye Sensitized Solar Cell