Atomically thin two-dimensional organic-inorganic hybrid perovskites

Organic-inorganic hybrid perovskites, which have shown to be promising semiconductor materials for photovoltaic applications, have been made into atomically thin two-dimensional (2D) sheets. We report the solution-phase growth of single- and few-unit-cell-thick single-crystalline 2D hybrid perovskit...

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Veröffentlicht in:Science (American Association for the Advancement of Science) 2015-09, Vol.349 (6255)
Hauptverfasser: Dou, Letian, Wong, Andrew B., Yu, Yi, Lai, Minliang, Kornienko, Nikolay, Eaton, Samuel W., Fu, Anthony, Bischak, Connor G., Ma, Jie, Ding, Tina, Ginsberg, Naomi S., Wang, Lin-Wang, Alivisatos, A. Paul, Yang, Peidong
Format: Artikel
Sprache:eng
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Zusammenfassung:Organic-inorganic hybrid perovskites, which have shown to be promising semiconductor materials for photovoltaic applications, have been made into atomically thin two-dimensional (2D) sheets. We report the solution-phase growth of single- and few-unit-cell-thick single-crystalline 2D hybrid perovskites of (C4H9NH3)2PbBr4 with well-defined square shape and large size. Different from the other 2D materials, the hybrid perovskite sheets exhibit an unusual structural relaxation, and this structural change leads to a band gap shift as compared to the bulk crystal. The high-quality 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.
ISSN:0036-8075
1095-9203