Question 18M.3.hl.TZ1.15b
| Date | May 2018 | Marks available | [Maximum mark: 2] | Reference code | 18M.3.hl.TZ1.15b |
| Level | hl | Paper | 3 | Time zone | TZ1 |
| Command term | State | Question number | b | Adapted from | N/A |
Photovoltaic cells are much less hazardous than nuclear fission.
Dye-sensitized solar cells, DSSCs, use a dye to absorb the sunlight. State two advantages that DSSCs have over traditional silicon based photovoltaic cells.
[2]
Any two of:
cheaper
OR
ease of fabrication
use light of lower energy/lower frequency/longer wavelength
absorb wider range of wavelengths
dye converts most/all absorbed photons into electrons
plentiful /renewable resources «to construct DSSC cells»
operate at lower «internal» temperatures/better at radiating heat away «since constructed with thin front layer of conductive plastic compared to glass box in photovoltaic cell»
use of nanoparticles provides large surface area exposure to sunlight/sun/light
can absorb better under cloudy/low light conditions
better conductivity
more flexible
[2 marks]
