DOI: 10.1126/science.aac7660 ISSN:
Atomically thin two-dimensional organic-inorganic hybrid perovskites
Letian Dou, Andrew B. Wong, Yi Yu, Minliang Lai, Nikolay Kornienko, Samuel W. Eaton, Anthony Fu, Connor G. Bischak, Jie Ma, Tina Ding, Naomi S. Ginsberg, Lin-Wang Wang, A. Paul Alivisatos, Peidong Yang- Multidisciplinary
Flat perovskite crystals
Bulk crystals and thick films of inorganic-organic perovskite materials such as CH 3 NH 3 PbI 3 have shown promise as active material for solar cells. Dou et al. show that thin films—a single unit cell or a few unit cells thick—of a related composition, (C 4 H 9 NH 3 ) 2 PbBr 4 , form squares with edges several micrometers long. These materials exhibit strong and tunable blue photoluminescence.
Science
, this issue p.