Power Conversion Efficiency of Lowest and Highest Performing Spin-coated and Spray-coated
Electron Transport Layers
Power conversion efficiency (%)
Which choice best describes data from the graph that support Taylor and colleagues' conclusion?
A) Both the ETL applied through spin coating and the ETL applied through spray coating showed a power conversion efficiency greater than 10% at their lowest performing thickness.
B) The lowest performing ETL applied through spray coating had a higher power conversion efficiency than the highest performing ETL
applied through spin coating.
C)
The highest performing ETL applied through spray coating showed a power conversion efficiency of approximately 13%, while the highest performing ETL applied through spin coating showed a power conversion efficiency of approximately 11%.
D) There was a substantial difference in power conversion efficiency between the lowest and highest performing ELs applied through spray coating.
forming
highest performing
Thickness
spray coating
I spin coating
Perovskite solar cells convert light into electricity more efficiently than earlier kinds of solar cells, and manufacturing advances have recently made them commercially attractive. One limitation of the cells, however, has to do with their electron transport layer (ETL), through which absorbed electrons must pass.
Often the ETL is applied through a process called spin coating, but such ELs are fairly inefficient at converting input power to output power.
André Taylor and colleagues tested a novel spray coating method for applying the ETL. The team produced ELs of various thicknesses and concluded that spray coating holds promise for improving the power conversion efficiency of ELs in perovskite solar cells.
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