Wang Xin, He Junjie, Zhou Benqing, Zhang Youming, Wu Jiatao, Hu Rui, Liu Liwei, Song Jun, Qu Junle
College of Optoelectronic Engineering, Key Lab of Optoelectronic Devices and Systems of Ministry of Education/Guangdong Province, Shenzhen University, Shenzhen, 518060, China.
Biophotonics Research Laboratory, Center of Interdisciplinary Biomedical Education and Research, College of Mathematics and Science, University of Central Oklahoma, Oklahoma, 73034, USA.
Angew Chem Int Ed Engl. 2018 Jul 9;57(28):8668-8673. doi: 10.1002/anie.201804886. Epub 2018 Jun 12.
As a highly stable band gap semiconductor, antimonene is an intriguing two-dimensional (2D) material in optoelectronics. However, its short layer distance and strong binding energy make it challenging to prepare high-quality large 2D antimonene; therefore, its predicted tunable band gap has not been experimentally confirmed. Now, an approach to prepare smooth and large 2D antimonene with uniform layers that uses a pregrinding and subsequent sonication-assisted liquid-phase exfoliation process has been established. Mortar pregrinding provides a shear force along the layer surfaces, forming large, thin antimony plates, which can then easily be exfoliated into smooth, large antimonene, avoiding long sonication times and antimonene destruction. The resulting antimonene also enabled verification of the tunable band gap from 0.8 eV to 1.44 eV. Hole extraction and current enhancement by about 30 % occurred when the antimonene was used as a hole transport layer in perovskite solar cells.
作为一种高度稳定的带隙半导体，锑烯是一种在光电子学中极具吸引力的二维（2D）材料。然而，其较短的层间距和较强的结合能使得制备高质量的大尺寸二维锑烯具有挑战性；因此，其预测的可调带隙尚未得到实验证实。现在，一种通过预研磨和随后的超声辅助液相剥离工艺来制备具有均匀层的光滑大尺寸二维锑烯的方法已经建立。研钵预研磨沿着层表面提供剪切力，形成大的薄锑板，然后可以很容易地将其剥离成光滑的大尺寸锑烯，避免了长时间的超声处理和锑烯的破坏。所得的锑烯还能够验证其从0.8 eV到1.44 eV的可调带隙。当锑烯用作钙钛矿太阳能电池的空穴传输层时，空穴提取和电流增强约30%。
