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Atomically thin two-dimensional organic-inorganic hybrid perovskites

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Atomically thin 2D hybrid perovskite sheets exhibit photoluminescent emissions that are tunable by changing sheet thickness & composition.

Scientific Achievement
A solution-phase growth method is developed to synthesize atomically thin 2D hybrid perovskites with a well-defined square shape and large size. For the first time, we are introducing a new member of the 2D nanostructure family: an ionic semiconductor.

Significance and Impact
This opens opportunities for fundamental research and introduces a type of 2D material for nanoscale optoelectronic devices.

Research Details

  • The hybrid perovskite 2D sheets exhibit an unusual structural relaxation compared to the bulk material.
  • The subtle structural change leads to a band gap shift as compared to the bulk material.
  • The 2D crystals exhibit efficient photoluminescence, and color tuning could be achieved by changing sheet thickness as well as composition via the synthesis of related materials

L. Dou, A Wong, Y Yu, M Lai, N Kornienko, S Eaton, A Fu, C Bischak, J Ma, T Ding, N Ginsberg, L-W Wang, AP Alivisatos, P Yang. Science (2015)