Abstract
Halide perovskites offer low cost and high efficiency solar cell materials but serious issues related to air and moisture stability remain.
Highlights
Organic lead halide perovskite-based solar cells are currently a subject of intense research interest due to their combination of low-cost production methods with high power conversion efficiencies, which have shown rapid increases
Thin lms of CH3NH3PbI3 on cleaned plain glass substrates were soaked in the dark for two hours by bubbling dry nitrogen through a speci c water/glycerol mix to obtain a selected humidity of 0%, 25% or 85% RH
The exact protocol for sample preparation is described in the Experimental section.[42]
Summary
Organic lead halide perovskite-based solar cells are currently a subject of intense research interest due to their combination of low-cost production methods with high power conversion efficiencies, which have shown rapid increases. Despite these promising features, there are fundamental issues of operational and material stability,[1,2,3,4] along with the associated toxicity of lead, that restrict the commercial possibilities of devices employing these materials. Water has been shown to permeate across perovskite structures to form partly hydrated phases These factors demonstrate the potency of water in determining the performance and stability of CH3NH3PbI3 lms.[30,34]
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