Abstract
In this work, we describe the role of the different layers in perovskite solar cells to achieve reproducible, ~16% efficient perovskite solar cells. We used a planar device architecture with PEDOT:PSS on the bottom, followed by the perovskite layer and an evaporated C60 layer before deposition of the top electrode. No high temperature annealing step is needed, which also allows processing on flexible plastic substrates. Only the optimization of all of these layers leads to highly efficient and reproducible results. In this work, we describe the effects of different processing conditions, especially the influence of the C60 top layer on the device performance.
Highlights
Perovskite solar cells have attracted a lot of attention since their first report in 2009 [1]
A schematic of the device structure used for optimizing the solar cell performance is shown in
The optimization results in the previous sections clearly indicate that does the
Summary
Perovskite solar cells have attracted a lot of attention since their first report in 2009 [1]. The reported efficiency has exceeded over 20% [2,3], which makes it an extremely promising and fast developing candidate for a generation solar cell This exciting progress is attributed to the application and exploration of organic-inorganic lead-halide perovskite. Perovskite is a large class of materials, named after the Russian mineralogist Lev Perovski This special lead-halide perovskite possesses almost all desired properties for light-harvesting solar cell materials, such as suitable direct band-gap [4,5,6,7], strong light absorption ability [8,9], long charge carrier diffusion length [10,11,12,13]. It is exceptional that it forms an excellent light harvesting semiconductor material from solution processing
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