Conceptos Básicos
Molecular hybrid interface engineering using a combination of self-assembled molecules and aromatic compounds significantly improves the performance and stability of inverted perovskite solar cells.
Resumen
The content discusses the development of an improved interface in inverted perovskite solar cells (PSCs) to address the limitations of existing self-assembled monolayers (SAMs). Specifically:
- Inverted PSCs are a key pathway for commercializing perovskite photovoltaic technology due to their higher power conversion efficiency (PCE) and operational stability compared to normal device structures.
- Recent advancements in SAMs and passivation strategies have enabled inverted PSCs to achieve PCEs exceeding 25%.
- However, poor wettability and agglomeration of SAMs can cause interfacial losses, limiting further improvements in PCE and stability.
- The authors report a molecular hybrid approach by co-assembling a multi-carboxylic acid functionalized aromatic compound (4,4',4''-nitrilotribenzoicacid, NA) with a popular SAM ([4-(3,6-dime-thyl-9H-carbazol-9-yl)butyl]phosphonic acid, Me-4PACz) to improve the heterojunction interface.
- The molecular hybrid of Me-4PACz and NA substantially improved the interfacial characteristics, leading to a record-certified steady-state efficiency of 26.54% for inverted PSCs.
- This strategy is also scalable, achieving the highest certified PCE of 22.74% for inverted mini-modules with an aperture area of 11.1 cm2.
- The devices maintained 96.1% of their initial PCE after more than 2,400 hours of 1-sun operation in ambient air, demonstrating excellent stability.
Estadísticas
The inverted perovskite solar cells demonstrated a record-certified steady-state efficiency of 26.54%.
The inverted mini-modules achieved the highest certified PCE of 22.74% with an aperture area of 11.1 cm2.
The devices maintained 96.1% of their initial PCE after more than 2,400 hours of 1-sun operation in ambient air.
Citas
"The molecular hybrid of Me-4PACz with NA could substantially improve the interfacial characteristics."
"The resulting inverted PSCs demonstrated a record-certified steady-state efficiency of 26.54%."
"Crucially, this strategy aligns seamlessly with large-scale manufacturing, achieving the highest certified PCE for inverted mini-modules at 22.74% (aperture area: 11.1 cm2)."
"Our device also maintained 96.1% of its initial PCE after more than 2,400 hours of 1-sun operation in ambient air."