Wed, 30/09/2015 – 12:15pm to 1:30pm
S16 Level 6 Theory Common Room
This Wednesday we will have our 2D Materials Forum (September), Xiang Du will give us a talk. The detail of the presentation is listed below.
Welcome to join the seminar and if anyone has some suggestions or want to be the speaker, please feel free to send email to email@example.com.
Pizza and soft drinks are provided in the seminar!
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Title: Surface Engineered 1D and 2D Nanomaterials for Electronic and Optoelectronic Devices
Speaker: Xiang Du (Research Assistant)
Time and location: September 30th, Wednesday, 12:15, S16, Level 6, Theory conference room
Abstract: Attributing to the large surface-to-volume ratio of nanomaterials, surface plays a crucial role in determining their electronic and optical properties. Surface modification shows great potential to modulate the performance of various 1D and 2D nanomaterials based electronic and optoelectronic devices. In this presentation, I will introduce two effective surface engineering approaches which are H2 annealing and surface transfer doping, to significantly enhance the performance of 1D (MoO3 nanobelts) and 2D (black phosphorus) nanomaterials based functional devices, respectively. Through H2 annealing, a high-performance photodetector fabricated by gap states assisted single MoO3 nanobelt with wide visible spectrum response was successfully achieved. On the other hand, the ambipolar characteristics of BP based FETs were effectively tuned via surface functionalization of Cs2CO3 and MoO3. This doping can also modulate the Schottky junctions formed between metal contacts and BP flakes, and hence to enhance the photo responsivity of BP based photodetectors.