Pei Jiajie, Gai Xin, Yang Jiong, Wang Xibin, Yu Zongfu, Choi Duk-Yong, Luther-Davies Barry, Lu Yuerui
Research School of Engineering, College of Engineering and Computer Science, the Australian National University, Canberra, Australian Capital Territory 2601, Australia.
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China.
Nat Commun. 2016 Jan 22;7:10450. doi: 10.1038/ncomms10450.
It has been a long-standing challenge to produce air-stable few- or monolayer samples of phosphorene because thin phosphorene films degrade rapidly in ambient conditions. Here we demonstrate a new highly controllable method for fabricating high quality, air-stable phosphorene films with a designated number of layers ranging from a few down to monolayer. Our approach involves the use of oxygen plasma dry etching to thin down thick-exfoliated phosphorene flakes, layer by layer with atomic precision. Moreover, in a stabilized phosphorene monolayer, we were able to precisely engineer defects for the first time, which led to efficient emission of photons at new frequencies in the near infrared at room temperature. In addition, we demonstrate the use of an electrostatic gate to tune the photon emission from the defects in a monolayer phosphorene. This could lead to new electronic and optoelectronic devices, such as electrically tunable, broadband near infrared lighting devices operating at room temperature.
制备磷烯的空气稳定的少层或单层样品一直是一个长期挑战，因为薄磷烯膜在环境条件下会迅速降解。在此，我们展示了一种新的高度可控方法，用于制备具有指定层数（从几层到单层）的高质量、空气稳定的磷烯膜。我们的方法包括使用氧等离子体干法蚀刻，以原子精度逐层减薄厚剥离的磷烯薄片。此外，在稳定的磷烯单层中，我们首次能够精确设计缺陷，这导致在室温下近红外区域以新频率高效发射光子。此外，我们展示了使用静电栅极来调节单层磷烯中缺陷的光子发射。这可能会带来新的电子和光电器件，例如在室温下工作的电可调宽带近红外照明设备。
