Atomically thin 2D sheets of conducting perovskite hybrids have been produced in solution. The crystals have conducting properties that make them a contender as a replacement for silicon.
Ultrathin sheets of a new 2D hybrid perovskite are square-shaped and relatively large in area.
2D纸由研究人员生产美国能源部(DOE)’s劳伦斯伯克利国家实验室（伯克利实验室）。由于它们的结构是离子的，而不是共价，它们具有有效的颜色可调性，光致发光和在共价半导体片中未观察到的不同结构松弛。原子薄薄钙钛矿板具有方形，大面积大，质量高。
The 2D hybrid organic-inorganic perovskite sheets have joined the list of potential replacements for silicon which includes graphene, molybdenum disulfide and boron nitride.
We believe this is the first example of 2D atomically thin nanostructures made from ionic materials
- Dr.Peidong Yang, Berkeley
Dr. Peidong Yang, a chemist with Berkeley Lab’s Materials Sciences Division and world authority on nanostructures, first came up with the idea for this research some 20 years ago. Yang is a co-director of the Kavli Energy NanoScience Institute (Kavli-ENSI), and holds appointments with the University of California (UC) Berkeley.
我们的研究结果为原子薄2D杂交钙锌矿合成和表征的基本研究开辟了机会，并引入了一种用于纳米级光电器件的新的2D解决方案处理半导体的新系列，例如场效应晶体管和光电探测器。
- Dr.Peidong Yang, Berkeley
常规的钙酸盐是金属氧化物离子材料，其具有超导，磁阻，压电和铁电等性质。亚博网站下载
通过溶液处理转化为晶体或薄膜的有机 - 无机杂交钙酯已用于光伏器件。这些光伏器件直到现在达到20％的效率。
诸如机械剥离，化学气相沉积和旋涂的技术对将钙锌矿分离成单独的2D片并不非常有效。
当杨是一个PhD student at Harvard University, he had suggested a new method for creating 2D hybrid perovskite nanostructures and modifying their electronic properties. He passed on this idea to Letian Dou, a post-doctoral student in his research group, and co-lead author of the paper.
Dou与Andrew Wong and Yi Yu，其他铅作者合作，以及合成的杂交钙钛矿 - CH3NH3PB13的合成式2D张，其由碳，氮气，氢气组成。铅和碘原子。
“Unlike exfoliation and chemical vapor deposition methods, which normally produce relatively thick perovskite plates, we were able to grow uniform square-shaped 2D crystals on a flat substrate with high yield and excellent reproducibility,” says Dou. “We characterized the structure and composition of individual 2D crystals using a variety of techniques and found they have a slightly shifted band-edge emission that could be attributed to structural relaxation. A preliminary photoluminescence study indicates a band-edge emission at 453 nanometers, which is red-shifted slightly as compared to bulk crystals. This suggests that color-tuning could be achieved in these 2D hybrid perovskites by changing sheet thickness as well as composition via the synthesis of related materials.”
- Dr.Peidong Yang, Berkeley
The high crystallinity quality is demonstrated by geometry of the square-shaped 2D crystals, and as they are large in size, they would possibly be easy to integrate in next-generation devices.
研究论文，标题为“原子上薄二维有机 - 无机杂交疫苗，”在科学期刊上发表。亚博老虎机网登录
The DOE’s Office of Science supported the study. The characterization work was performed at beamline 7.3.3 of the Advanced Light Source and Molecular Foundry’s National Center for Electron Microscopy.