硫系化合物
化学
带隙
晶体工程
维数之咒
半导体
单独一对
有机半导体
三元运算
分子
纳米技术
光电子学
晶体结构
结晶学
超分子化学
材料科学
有机化学
机器学习
计算机科学
程序设计语言
作者
Hanjun Yang,Sagarmoy Mandal,Yoon Ho Lee,Jee Yung Park,Han Zhao,Chongli Yuan,Libai Huang,Ming Chen,Letian Dou
摘要
Two-dimensional (2D) metal organic chalcogenides (MOCs) such as silver phenylselenolate (AgSePh) have emerged as a new class of 2D materials due to their unique optical properties. However, these materials typically exhibit large band gaps, and their elemental and structural versatility remain significantly limited. In this work, we synthesize a new family of 2D lead organic chalcogenide (LOC) materials with excellent structural and dimensionality tunability by designing the bonding ability of the organic molecules and the stereochemical activity of the Pb lone pair. The introduction of electron-donating substituents on the benzenethiol ligands results in a series of LOCs that transition from 1D to 2D, featuring reduced band gaps (down to 1.7 eV), broadband emission, and strong electron-phonon coupling. We demonstrated a prototypical single crystal photodetector with 2D LOC that showed the dimensionality engineering on the transport property of LOC semiconductors. This study paves the way for further development of the synthesis and optical properties of novel organic-inorganic hybrid 2D materials.
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