Damp heat–stable perovskite solar cells with tailored-dimensionality 2D/3D heterojunctions
By Randi Azmi, Esma Ugur, A. Seitkhan, Faisal Aljamaan, A. Subbiah, Jiang Liu, G. Harrison, M. I. Nugraha, Mathan K. Eswaran, Maxime Babics and 10 more. Science, 2022
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If perovskite solar cells (PSCs) with high power conversion efficiencies (PCEs) are to be commercialized, they must achieve long-term stability, which is usually assessed with accelerated degradation tests. One of the persistent obstacles for PSCs has been successfully passing the damp-heat test (85°C and 85% relative humidity), which is the standard for verifying the stability of commercial photovoltaic (PV) modules. We fabricated damp heat–stable PSCs by tailoring the dimensional fragments of two-dimensional perovskite layers formed at room temperature with oleylammonium iodide molecules; these layers passivate the perovskite surface at the electron-selective contact. The resulting inverted PSCs deliver a 24.3% PCE and retain >95% of their initial value after >1000 hours at damp-heat test conditions, thereby meeting one of the critical industrial stability standards for PV modules. Description Stabilizing inverted solar cells Although inverted (p-i-n) perovskite solar cells (PSCs) have advantages in fabrication and scaling compared with n-i-p cells, their power conversion efficiencies (PCEs ) are usually lower. Azmi et al. show that by tailoring the number of octahedral inorganic sheets in two-dimensional perovskite (2DP) passivation layers for three-dimensional perovskite active layers, PCEs of more than 24% could be achieved (see the Perspective by Luther and Schelhas). The 2DP layers formed with oleylammonium iodide molecules at the electron-selective interface passivated trap states and suppressed ion migration. These PSCs retained more than 95% of their initial efficiency after 1000 hours of damp-heat testing (85°C and 85% relative humidity), which passes a key industrial stability standard. —PDS Tailored two-dimensional perovskite passivation layers enable efficient, damp-heat stable inverted perovskite solar cells.
Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Polymers and Plastics
View Paper: https://www.semanticscholar.org/paper/d8e14d6bc455d25e927e232e6aeecaaeed8667fa
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Citations in the corpus
- Surface reaction for efficient and stable inverted perovskite solar cells (2022, background): “An ideal surface engineering approach for p–i–n PSCs should: (1) not negatively affect the bulk quality of the perovskite film; (2) not produce materials hindering charge transfer; (3) reduce the density of unwanted defects; and/or (4) have a surface region that creates a built-in electric field, en”