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Affiliation(s)

State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China

ABSTRACT

This article brings up some explanations and clarifications about twice deposition of lead iodide written in the previous article [1], after looking into the twice deposition of lead iodide and carrying on the improving by a layer of PbBr2 instead of PbI2, the short circuit current density (Jsc) has decreased, allowing to explain the twice deposition is, in fact, one deposition. The absorbance of perovskite will be discussed. The substrate temperature is the most important parameter because it can improve the efficiency of the perovskite solar cells, the substrate temperature should be about 100 °C at the deposition of lead iodide, and when the deposition of methylammonium iodide is done when the substrate is still hot, the efficiency is also improved. The temperature during the preparation is less important than the humidity, but the preparation in the glovebox allows that the environmental conditions be controlled.

KEYWORDS

Deposition, perovskite, efficiency.

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