?-CAROTENE OF MARINE MICROALGAE Chlorella sp. FOR A SENSITIZER OF SOLAR CELL
Together with as oil producer, microalgae are also produce photosynthetic pigments. As known, the photosynthetic pigments (such as chlorophylls and carotenoid compounds) in the form of light harvesting complex molecules are capable for harvesting, transmitting, and converting sunlight energy into ex...
Saved in:
| Main Author: | |
|---|---|
| Format: | Theses |
| Language: | Indonesia |
| Subjects: | |
| Online Access: | https://digilib.itb.ac.id/gdl/view/34395 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Together with as oil producer, microalgae are also produce photosynthetic pigments. As known, the photosynthetic pigments (such as chlorophylls and carotenoid compounds) in the form of light harvesting complex molecules are capable for harvesting, transmitting, and converting sunlight energy into excited electron in the photosynthesis process. The present study focused on understanding the potential of ?-carotene produced by Chlorella sp. for a sensitizer of solar cell. The pigments were isolated from Chlorella sp. cells grown in the Walne medium, then separated and purified by the chromatography method, characterized by the UV-Vis spectrophotometry, and employed then as a sensitizer of solar cell. The short circuit current density (Jsc), open circuit voltage (Voc), fill factor (FF), and efficiency (?) of the solar cell were determined. The results showed that the average cell density of Chlorella sp. for 10 d was 21.41×106 cells/mL culture or 1.68 g cells/L culture. Four types of pigments were identified: ?-carotene (425, 455, and 471.5 nm), chlorophyll a (soret bands of 381.6, 410.7 and 430.1 nm as well as phorphyrin bands of 533.9, 579.3, 616.3, and 661.7 nm), chlorophyll b (soret bands of 425.0 and 453,6 as well as phorphyrin bands 595.6 and 644.3 nm) and violaxanthin (413.3, 436.5 and 465.4 nm). Pigment concentrations (µg/mL) of the crude extract of Chlorella sp. biomass was chlorophyll a 815.67, chlorophyll b 332.55, and carotenoid compounds 296.66. Regular solar cells without a sensitizer had inability to capture light in the experiment condition. Crude-extract-sensitized solar cells exhibited Jsc of 0.012 mA/cm2, Voc of 0.23 V, FF of 0.3523, and ? of 0.000975%. Meanwhile, ?-carotene-sensitized solar cells showed Jsc of 0.185 mA/cm2, Voc of 0.333 V, FF of 0.303, and ? of 0.0216%. The results suggested that the ?-carotene of Chlorella sp. can be used for a sensitizer of solar cell. |
|---|