From Groundwork to Efficient Solar Cells: On the Importance of the Substrate Material in Co-Evaporated Perovskite Solar Cells

Abzieher Tobias; Feeney Thomas; Schackmar FabianDonie Yidenekachew J.Hossain Ihteaz M.Schwenzer Jonas A.Hellmann TimMayer ThomasPowalla MichaelPaetzold Ulrich W.

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From Groundwork to Efficient Solar Cells: On the Importance of the Substrate Material in Co-Evaporated Perovskite Solar Cells

机译：From Groundwork to Efficient Solar Cells: On the Importance of the Substrate Material in Co-Evaporated Perovskite Solar Cells

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Vacuum-based deposition of optoelectronic thin films has a long-standing history. However, in the field of perovskite-based photovoltaics, these techniques are still not as advanced as their solution-based counterparts. Although high-efficiency vacuum-based perovskite solar cells reaching power conversion efficiencies (PCEs) above 20 are reported, the number of studies on the underlying physical and chemical mechanism of the co-evaporation of lead iodide and methylammonium iodide is low. In this study, the impact of one of the most crucial process parameters in vacuum processes-the substrate material-is studied. It is shown that not only the morphology of the co-evaporated perovskite thin films is significantly influenced by the surface polarity of the substrate material, but also the incorporation of the organic compound into the perovskite framework. Based on these studies, a selection guide for suitable substrate materials for efficient co-evaporated perovskite thin films is derived. This selection guide points out that the organic vacuum-processable hole transport material 2,2 '',7,7 ''-tetra(N,N-di-p-tolyl)amino-9,9-spirobifluorene is an ideal candidate for the fabrication of efficient all-evaporated perovskite solar cells, demonstrating PCEs above 19. Furthermore, building on the insights into the formation of the perovskite thin films on different substrate materials, a basic crystallization model for co-evaporated perovskite thin films is suggested.

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《Advanced functional materials》 |2021年第42期|2104482.1-2104482.19|共19页
作者
Abzieher Tobias; Feeney Thomas; Schackmar FabianDonie Yidenekachew J.Hossain Ihteaz M.Schwenzer Jonas A.Hellmann TimMayer ThomasPowalla MichaelPaetzold Ulrich W.;
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Karlsruhe Inst Technol KIT, Light Technol Inst LTI, Engesserstr 13, D-76131 Karlsruhe, Germany;

Karlsruhe Inst Technol KIT, Inst Microstruct Technol IMT, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany;

Karlsruhe Inst Technol KIT, Light Technol Inst LTI, Engesserstr 13, D-76131 Karlsruhe, Germany|Karlsruhe Inst Technol KIT, Inst Microstruct Technol IMT, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, GermanyTech Univ Darmstadt, Mat Sci Dept, Surface Sci Lab, Alarich Weiss Str 2, D-64287 Darmstadt, Germany;

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crystallization dynamics; perovskite solar cells; photovoltaics; substrate materials; thermal co-evaporation;

From Groundwork to Efficient Solar Cells: On the Importance of the Substrate Material in Co-Evaporated Perovskite Solar Cells

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