Multifunctional two-dimensional (2D) metal-organic frameworks (2D-MOFs) were synthesized and characterized. The results indicate the formation of eclipsed, hexagonal stacking of the MOF layers: two of the MOFs were built on linear organic linkers to form the triangle-tiled plane hxl net, the other was built on planar tripod linkers to form the rhombus-tiled, binodal 3,6-connected kgd net (dual of the kagome net). All three nets contain 6-connected Zr6O8 clusters to offer excellent thermal stability even in boiling-water. Due to the conjugated organic likers in these MOFs, they exhibit relatively high electron mobility, which enables them to be employed as efficient electron-transporting interfacial layers (ETLs) for perovskite solar cells (PVSCs) to extract electrons from perovskites. The resultant PVSCs show very high power conversion efficiencies (PCE). Besides functioning as an ordered template to allow better-quality perovskites to form on top, the MOFs offer several unique advantages: 1) They can improve charge carrier mobility for better charge extraction; 2) They can form good contact at the perovskite interface to passivate the surface defects/charge traps, and consequently to facilitate charge extraction and minimize energy loss; 3) They can also capture the leaked Pb+2 ions from degraded perovskites to prevent contamination of the environment.

Multifunctional metal-organic frameworks for efficient photovoltaic devices

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.