Zero-Dimensional Cs4PbBr6 Perovskite Nanocrystals

Yuhai Zhang, Makhsud I. Saidaminov, Ibrahim Dursun, Haoze Yang, Murali Banavoth, Erkki Alarousu, Emre Yengel, Buthainah Alshankiti, Osman Bakr, Omar F. Mohammed

Research output: Contribution to journalArticlepeer-review

189 Scopus citations

Abstract

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 the zero-dimensional (0-D) phase of this promising class of materials remains elusive. Here we report the synthesis of a new class of colloidal semiconductor NCs based on Cs4PbBr6, the 0-D 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 colloidal form (PLQY: 65%), and, more importantly, in the form of thin film (PLQY: 54%). Notably, the latter is among the highest values reported so far for perovskite NCs in the solid form. Our work brings the 0-D phase of perovskite into the realm of colloidal NCs with appealingly high PLQY in the film form, which paves the way for their practical application in real devices.
Original languageEnglish (US)
Pages (from-to)961-965
Number of pages5
JournalThe Journal of Physical Chemistry Letters
Volume8
Issue number5
DOIs
StatePublished - Feb 14 2017

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