Question in-a-p
In a paper about p-i-n planar perovskite solar cells (one of several perovskite cell architectures designed to collect and store solar power), Lyndsey McMillon-Brown et al. describe a method for fabriing the cell’s electronic transport layer (ETL) using a spray coating. Conventional ETL fabriion is accomplished using a solution of nanoparticles. The process can result in a loss of up to 80% of the solution, increasing the cost of manufacturing at scale—an issue that may be obviated by spray coating fabriion, which the researchers describe as “highly reproducible, concise, and practical.”
What does the text most strongly suggest about conventional ETL fabriion?
It is less suitable for manufacturing large volumes of planar p-i-n perovskite solar cells than an alternative fabriion method may be.
It is more expensive when manufacturing at scale than are processes for fabriing ETLs used in other perovskite solar cell architectures.
It typically entails a greater loss of nanoparticle solution than do other established approaches for ETL fabriion.
It is somewhat imprecise and therefore limits the potential effectiveness of p-i-n planar perovskite solar cells at capturing and storing solar power.
In a paper about p-i-n planar perovskite solar cells (one of several perovskite cell architectures designed
Hard-difficulty · SAT Reading & Writing · Inferences — Conclusions implied but not stated. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.
Answer explanation
Choice A is the best answer. Conventional solar cell fabriion increases “the cost of manufacturing at scale,” but spray coating might get rid of that problem.
Choice B is incorrect. This is not completely supported by the text. While it’s true that conventional ETL fabriion is expensive at scale, there’s nothing in the text that mentions other perovskite solar cell architectures. Choice C is incorrect. This choice does not match the text. Only one conventional method of ETL fabriion is described, so we can’t compare the solution loss in this method to that of other conventional methods. Choice D is incorrect. This choice isn’t supported by the text. The text never suggests that the effectiveness of solar cells changes based on their method of fabriion.
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