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Understanding the impact of surface roughness: changing from FTO to ITO to PEN/ITO for flexible perovskite solar cells.

ABSTRACT: So far, single-junction flexible PSCs have been lacking in efficiency compared to rigid PSCs. Recently, > 23% have been reported. We therefore focus on understanding the differences between rigid and flexible substrates. One often neglected parameter is the different surface roughness which directly affects the perovskite film formation. Therefore, we adjust the layer thickness of SnO₂ and the perovskite layers. Furthermore, we introduce a PMMA layer between the perovskite and the hole transporting material (HTM), spiro-MeOTAD, to mitigate shunting pathways. In addition, the multication perovskite Rb_0.02Cs_0.05FA_0.77MA_0.16Pb(I_0.83Br_0.17)₃ is employed, resulting in stabilized performances of 16% for a flexible ITO substrate and 19% on a rigid ITO substrate.

SUBMITTER: Holzhey P

PROVIDER: S-EPMC10115802 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature

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Understanding the impact of surface roughness: changing from FTO to ITO to PEN/ITO for flexible perovskite solar cells.

Holzhey Philippe P Prettl Michael M Collavini Silvia S Mortan Claudiu C Saliba Michael M

Scientific reports 20230419 1

So far, single-junction flexible PSCs have been lacking in efficiency compared to rigid PSCs. Recently, > 23% have been reported. We therefore focus on understanding the differences between rigid and flexible substrates. One often neglected parameter is the different surface roughness which directly affects the perovskite film formation. Therefore, we adjust the layer thickness of SnO<sub>2</sub> and the perovskite layers. Furthermore, we introduce a PMMA layer between the perovskite and the hol ...[more]

PMID: 37076559

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