Colloidal Synthesis of Quantum Confined Single Crystal CsPbBr3 Nanosheets with Lateral Size Control up to the Micrometer Range
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- 作者：Javad Shamsi ; Zhiya Dang ; Paolo Bianchini ; Claudio Canale ; Francesco Di Stasio ; Rosaria Brescia ; Mirko Prato ; Liberato Manna
- 刊名：Journal of the American Chemical Society
- 出版年：2016
- 出版时间：June 15, 2016
- 年：2016
- 卷：138
- 期：23
- 页码：7240-7243
- 全文大小：307K
- 年卷期：0
- ISSN：1520-5126
文摘
We report the nontemplated colloidal synthesis of single crystal CsPbBr3 perovskite nanosheets with lateral sizes up to a few micrometers and with thickness of just a few unit cells (i.e., below 5 nm), hence in the strong quantum confinement regime, by introducing short ligands (octanoic acid and octylamine) in the synthesis together with longer ones (oleic acid and oleylamine). The lateral size is tunable by varying the ratio of shorter ligands over longer ligands, while the thickness is mainly unaffected by this parameter and stays practically constant at 3 nm in all the syntheses conducted at short-to-long ligands volumetric ratio below 0.67. Beyond this ratio, control over the thickness is lost and a multimodal thickness distribution is observed.