1. Zero-Dimensional Cs4PbBr6 Perovskite Nanocrystals
- Author
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Emre Yengel, Buthainah Alshankiti, Banavoth Murali, Omar F. Mohammed, Osman M. Bakr, Erkki Alarousu, Makhsud I. Saidaminov, Yuhai Zhang, Haoze Yang, and Ibrahim Dursun
- Subjects
Materials science ,Photoluminescence ,business.industry ,Quantum yield ,Nanotechnology ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Semiconductor ,Nanocrystal ,Phase (matter) ,General Materials Science ,Microemulsion ,Physical and Theoretical Chemistry ,Thin film ,0210 nano-technology ,business ,Perovskite (structure) - 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.
- Published
- 2017