Question

consult the plot of efficiency of solar cells prepared by the National Renewable Energy Laboratory (NREL). As of 2010, the ______________ cell has the highest efficiency and _____________ cells have the lowest efficiency. (Fill in the blanks.)

Select one:

a. single crystal Si; dye-sensitized

b. two-junction concentrator; inorganic;

c. three-junction concentrator; organic

d. single-junction concentrator; amorphous Si:H

Answer 1

From the Chart available for efficiency of solar cells at NREL as given in the question, we see that for 2010, the highest efficiency cell is of the type of Spire semicon which is marked as a three junction concentrator; organic. The single crystal cells lie in the mid region of the efficiency charts and the lowest efficiency is NREL (Zno/Pbs-QD) which is a two junction concentrator; inorganic type.

So,

Blank1- three junction concentrator; organic----------------(c)

Blank2- two junction concentrator; inorganic -------------------------(b)