Question 12
The dye-sensitized solar cell (DSSC) is a new type of solar cell which converts the visible light into electricity based on photosynthesis principle.
The figure ilustrates the DSSC work principles. The DSSC uses dyes or natural pigments to capture light energy. This energy excites electrons which can then flow toward the electrode.
Scientists use synthetic dyes and natural pigments like anthocyanins. Anthocyanins are a class of pigments found in many berries and other plants. Comparing with chlorophyll, anthocyanins have higher efficiency.
QUESTIONS:
a. (1 point) How is the working principle of dye sensitized solar cell?
b. (1.5 point) Write down the steps of energy convertion from the sun light-DSSC-lamp.
c. (2 point) Figure 7 shows the ultraviolet-visible (UV-Vis) spectrum of mulberry pigment with different concentrations. What can be concluded from the UV-Vis spectrum of mulberry pigment with different concentrations.
d. (2.5 points) State whether the statement is TRUE or FALSE.
- Anthocyanin is one of photosynthetic pigments
- Anthocyanin can express more than one color
- Chlorophyll can be used as insect attractant in pollination
- Anthocyanin can be found in plastids
- Chlorophyll can help plant to produce organic molecule
The figure ilustrates the DSSC work principles. The DSSC uses dyes or natural pigments to capture light energy. This energy excites electrons which can then flow toward the electrode.
Scientists use synthetic dyes and natural pigments like anthocyanins. Anthocyanins are a class of pigments found in many berries and other plants. Comparing with chlorophyll, anthocyanins have higher efficiency.
QUESTIONS:
a. (1 point) How is the working principle of dye sensitized solar cell?
b. (1.5 point) Write down the steps of energy convertion from the sun light-DSSC-lamp.
c. (2 point) Figure 7 shows the ultraviolet-visible (UV-Vis) spectrum of mulberry pigment with different concentrations. What can be concluded from the UV-Vis spectrum of mulberry pigment with different concentrations.
d. (2.5 points) State whether the statement is TRUE or FALSE.
- Anthocyanin is one of photosynthetic pigments
- Anthocyanin can express more than one color
- Chlorophyll can be used as insect attractant in pollination
- Anthocyanin can be found in plastids
- Chlorophyll can help plant to produce organic molecule