Black Phosphorus Langmuir-Blodgett Thin Films and Photodetectors
Département de génie physique
Polytechnique de Montréal
Présentation en anglais
Lien Zoom: https://umontreal.zoom.us/j/93026432919
Meeting ID: 930 2643 2919
Passcode: écrire en chiffre: un, trois, sept.
Abstract: Black phosphorus (BP) is a promising two-dimensional (2D) material for applications in optoelectronics and electronics due to its tunable direct bandgap (0.33-2.0 eV), high mobility (>103 cm2V-1s-1), and highly optical, transport and thermal anisotropy. Until now, mechanical exfoliation (the scotch-tape method) has been almost exclusively used for proof-of-concept devices, such as transistors, photodetectors, and light-emitting diodes. However, this technique is inherently unscalable and typically limited to sheets below 10 μm. Here, we demonstrate the assembly of BP nanosheets into large-area (20 mm * 18 mm) thin films using Langmuir-Blodgett (LB) technique. In addition, we use these films as active layers for mm-sized BP heterojunction photodetectors which show responsivities from the visible to the near-infrared.
Bio: Jian Mao is a postdoctoral fellow in Prof. Stéphane Kéna-Cohen's group at Polytechnique Montréal. He is currently researching in large-area black phosphorus and perovskite optoelectronic devices. Jian finished his Ph.D. at the University of Hong Kong in 2018 and undergraduate at Huazhong University of Science & Technology (China) in 2012.
For more information about Dr. Mao, you can consult his research web page.
Cette conférence est présentée par le RQMP.