WP1. 2D Material Growth and investigation of substrates
During the reporting period, BIU grew new 2D materials (Bi2Se(3-x)Sx)for expanding the variety of available layered materials processed by CVD growth. BIU also aimed at bandgap engineering of 2D materials alloys.
GS has a series of CVD grown Graphene or Graphene/hBN substrates samples.
NTUA, carried on with the DFT studies on the physical properties of 2D materials with a special focus on the electronic and topological properties of Bi2Se3-xSex alloys.
WP2. Laser Direct Transfer (LDT) process: LIBT and LIFT
The LIBT process for graphene transfer on glass has been developed and the resulting samples have been characterized using optical microscopy, Raman spectroscopy and SEM microscopy. Similarly, the LIFT process for the transfer of graphene, graphene/hBN and MoS2 on SiO2/Si substrates has been demonstrated and validated. Finite-temperature Ab Initio Molecular Dynamics (AIMD) DFT-based simulations were employed to identify a range of initial conditions for the atomic velocities in the substrate that can lead to detachment of the 2D overlayer.
WP3. Application 1: 2D SC enabled emitter integrated on Si photonic chip.
The final targets of the LEAF-2D project are split into three prototypes. All three prototypes have been designed, fabricated and evaluated at material and device level by the involved partners. I Diode behavior was observed, validating the successful transfer of the 2D material via LIFT. Record modulation speed was achieved using the 2nd generation of silicon photonics. Ultra-high bandwidth transmission lines (CPWs) were implemented using laser patterning and laser sintering of Ag nanoparticle inks. LIFT-based interconnection of the CPWs to the VCSELs was demonstrated. High-speed operation of the LIFT-interconnected VCSELs was verified by optical measurements.
WP4. Application 2: Graphene enabled touch sensor
The specifications for the performance and the design of the touch sensor have been defined and associated with KPIs. The fabrications processes involve laser based, conventional material processing and hybrid approaches comprising both. The resulting capacitors are characterized morphologically using optical microscopy, SEM, Raman to validate the presence of Graphene. At the device level, the capacitors are fully characterized by carrying out capacitance over voltage measurements and finally the most promising configurations are evaluated as touch sensors by applying controllable loads in cycles of CV measurements.
WP5. Dissemination and Exploitation
During the second reporting period, partner EXEL in close cooperation with the coordinator and the rest of the consortium, continued to implement consistently the project’s dissemination plan and making use of the already established tools and mechanisms for the dissemination of the project results to the relevant stakeholders and wider society. The consortium partners have already filed the following two patent applications.
WP6. Project management and coordination
The overall project management, including the administrative and scientific/technical management have been undertaken by the coordinator according to the provisions of GA art. 41.2b. The timely submission of project deliverables has been ensured and in the cases that this was not feasible, adequate justification has been provided. All milestones have been achieved, and overall the implementation of the project fulfilled the initially envisioned objectives, with some deviations for which mitigation strategies were successfully employed yielding scientifically and technologically interesting outcomes.
