Publication

Zero-Dimensional Cs4PbBr6 Perovskite Nanocrystals

Zero-Dimensional Cs4PbBr6 Perovskite Nanocrystals
Yuhai Zhang, Makhsud I. Saidaminov, Ibrahim Dursun, Haoze Yang, Banavoth Murali, Erkki Alarousu, Emre Yengel, Buthainah A. Alshankiti, Osman M. Bakr, and Omar F. Mohammed
J. Phys. Chem. Lett., 2017, 8 (5), pp 961–965 
Yuhai Zhang, Makhsud I. Saidaminov, Ibrahim Dursun, Haoze Yang, Banavoth Murali, Erkki Alarousu, Emre Yengel, Buthainah A. Alshankiti, Osman M. Bakr, Omar F. Mohammed
perovskite, nanocrystal
2017



​​Perovskite nanocrystals (NCs) have become leading candidates for solution-processed optoelectronics applications. While substantial work has been published on 3-D perovskite phases, the NC form of zero-dimensional (0-D) phase of this promising class of materials remains elusive. Here, we report the synthesis of a new class of colloidal semiconductors NCs based on Cs4PbBr6 - the zero-dimensional perovskite- enabled through the design of a novel low-temperature reverse microemulsion method with 85 % reaction yield. These 0-D perovskite NCs exhibit high photoluminescence quantum yield (PLQY) in the form of colloidal form (PLQY: 65%), and, more importantly, in the form of thin film (PLQY: 54%). Notably, the latter is amongst the highest values reported so far for perovskite NCs in solid form. Our work brings the zero-dimensional phase of perovskite into the realm of colloidal NCs with appealingly high PLQY in film form, which paves the way for their practical application in real devices.​
DOI: 10.1021/acs.jpclett.7b00105