Polymers and Functional Materials Division , CSIR-Indian Institute of Chemical Technology (IICT) , Uppal Road , Tarnaka, Hyderabad 500007 , India.
Langmuir. 2018 Dec 18;34(50):15507-15516. doi: 10.1021/acs.langmuir.8b02477. Epub 2018 Dec 6.
All-inorganic CsPbBr perovskite nanocrystals are emerging as a new class of semiconductors with outstanding optoelectronic properties and great potential for various applications, such as, lasing, photon detection, photovoltaics, etc. This article provides the effect of solvents on the reprecipitation of CsPbBr perovskite at room temperature. The results observed for CsPbBr perovskite in various antisolvents showed various cubes (nano- to microsized), self-assembly of nanocubes and nanorods. In addition, all of the various sizes (nano to micro) of cubes and self-assembly of nanocubes and shape-controlled nanorods exhibited band gap tuning at the green light region. The corresponding microscopy (field emission scanning electron microscopy and high-resolution transmission electron microscopy) images and photoluminescence quantum yield as well as lifetime decay are presented. To the best of our literature knowledge, this is the first report on various solvent-assisted studies on CsPbBr perovskite nanocrystals.
全无机 CsPbBr 钙钛矿纳米晶体作为一类具有出色光电性能的新型半导体材料而崭露头角，在激光、光子探测、光伏等各个领域都具有广泛的应用前景。本文研究了溶剂对 CsPbBr 钙钛矿在室温下再沉淀的影响。在各种抗溶剂中观察到 CsPbBr 钙钛矿呈现出各种立方体（纳米到微米尺寸）、纳米立方体的自组装和纳米棒。此外，所有的各种尺寸（纳米到微米）的立方体和纳米立方体的自组装以及形状可控的纳米棒都在绿光区域表现出了带隙调谐。本文还给出了相应的显微镜（场发射扫描电子显微镜和高分辨率透射电子显微镜）图像、光致发光量子产率以及寿命衰减。据我们所知，这是首次对 CsPbBr 钙钛矿纳米晶体进行各种溶剂辅助研究的报道。
