Journal
JOURNAL OF MATERIALS CHEMISTRY C
Volume 9, Issue 20, Pages 6536-6543Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1tc00481f
Keywords
-
Funding
- National Natural Science Foundation of China [61605207, 61704172, 61705229]
- Key R&D plan of the Ministry of Science and Technology [2017YFE0131900]
- Western Light Program of the Chinese Academy of Sciences and Youth Innovation Promotion Association of CAS [2018416]
Ask authors/readers for more resources
This study investigates the growth mechanism of high-quality oriented PbSe crystals on single atomic layer graphene at room temperature using the ECALE method. By adjusting the electrodeposition parameters, the crystalline phase and density of nucleating seeds are controlled to determine the submicron-crystal geometry. The controllable growth orientation and nucleation of PbSe crystals are achieved by combining UPD of Pb and OPD of Se, leading to a hybrid photodetector with infrared absorption benefits.
Highly efficient near- and medium-wave infrared detection at room temperature is considered one of the most intensive studies due to the robust detection under foggy weather or other low visibility conditions. 2D atomic layer graphene has an unconventional broad optical spectrum and high electron or hole mobility properties for next-generation electronic and optoelectronic devices. Single-layer graphene has a lower quantum efficiency, and PbSe has a direct narrow bandgap with a highly sensitive infrared response. Here, we examine the growth mechanism of high-quality oriented (200) PbSe crystals on single atomic layer graphene using the electrochemical atomic layer epitaxy (ECALE) method in an aqueous electrolyte. The crystalline phase and density of nucleating seeds controlled by adjusting the electrodeposition parameters are crucial for determining the submicron-crystal geometry. It is revealed that the controllable growth orientation and nucleation of PbSe crystals are realized by combining the underpotential deposition (UPD) of Pb and the overpotential deposition (OPD) of Se. The PbSe crystal/graphene hybrid photodetector indicates the benefit of infrared absorption. An extraordinary response speed of 1.8 ms, a photo-responsivity exceeding 36 A W-1, and a figure-of-merit detectivity of D* > 2.7 x 10(9) Jones have been demonstrated at 2.7 mu m and room temperature, demonstrating its potential for practical optical and optoelectronic applications.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available