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BEGIN:VEVENT
DTSTAMP:20260424T143000Z
UID:1688374800@ist.ac.at
DTSTART:20230703T110000
DTEND:20230703T120000
DESCRIPTION:Speaker: Gokul M. Anilkumar\nhosted by Hryhoriy Polshyn\nAbstra
 ct: Nanomaterials possess unique characteristics that distinguish them fro
 m their bulk counterparts. An intriguing example is the case of 2D transit
 ion metal dichalcogenides (TMDs) such as MoS2\, which undergo a transition
  from an indirect to a direct bandgap material when reduced to a monolayer
  thickness. These 2D materials interact through van der Waals forces in th
 e out-of-plane direction\, enabling the easy formation of heterostructures
  by simply stacking them onto various materials.By carefully fabricating t
 he right heterostructures\, we can harness their synergistic effects to fa
 bricate innovative functional devices. In this study\, we specifically foc
 used on utilizing lead halide perovskites as the material of choice for cr
 eating heterostructures with 2D materials due to their remarkable optical 
 properties\, including a high absorption coefficient\, long diffusion leng
 ths\, and direct bandgap nature.To begin\, we will discuss the novel growt
 h techniques we developed for synthesizing different TMDs and low-dimensio
 nal perovskites. The as-grown TMD monolayers exhibited excellent optical a
 nd electrical properties comparable to those of exfoliated samples. By emp
 loying a novel growth promoter\, we achieved conformal growth of TMDs\, an
 d we investigated the impact of strain on their electrical and optical pro
 perties. This will be followed by the synthesis of CsPbBr3 nanoplatelets. 
 However\, fabricating devices on low-dimensional perovskites presented a c
 hallenge due to their water-soluble nature. To overcome this hurdle\, we d
 evised a novel technique to fabricate high-quality devices on water-solubl
 e materials\, thus enabling us to explore the optical and electrical prope
 rties of perovskite nanoplatelets. Remarkably\, the CsPbBr3 devices exhibi
 ted very low dark current at room temperature and demonstrated ferroelectr
 ic behavior.Building upon these advancements\, we combined the two materia
 ls\, TMDs\, and perovskites\, to create heterostructures for the developme
 nt of functional devices such as photodiodes and LEDs. By leveraging the c
 omplementary properties of these materials\, we achieved promising results
  in terms of device performance. In conclusion\, we will discuss the futur
 e challenges and prospects associated with the utilization of heterostruct
 ures composed of low-dimensional materials\, shedding light on potential a
 venues for further research and development.
LOCATION:Foyer seminar room Ground floor / Office Bldg West\, ISTA
ORGANIZER:
SUMMARY:Gokul M. Anilkumar: Special Condensed Matter Seminar: Heterostructu
 res of Low-Dimensional Materials: Synthesis\, Properties\, and Device Appl
 ications
URL:https://talks-calendar.ista.ac.at/events/4287
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