Group for Physics of Ordered Nanostructures and New Materials in Photonics

APPLICATIONS

A new, proof-of-concept graphene microphone is up to 32 times more sensitive than a standard, nickel-based one, and could potentially be upgraded to perform far into the ultrasonic part of the spectrum.

GRAPHENE MICROPHONE

We demonstrate multilayer graphene microphones with a performance comparable to professional microphones. A microphone with a 60 layer graphene membrane displays up to 15 dB higher sensitivity compared to a commercial microphone, at frequencies up to 11 kHz. Finite element simulations confirm graphene microphone sensitivity and cutoff, and indicate that a microphone with a 300 layer graphene membrane would show similar sensitivity as state of the art condenser microphones, but with a frequency range extended up to 1 MHz, deeply entering the ultrasonic part of the spectrum.

Currently at GLAB we are developing a second generation of graphene microphones, with improved durability and integration into commercial packages. This work is an ongoing collaboration with the company Dirigent Acoustics.

Read more: Multilayer graphene condenser microphone
Todorović, D., Matković, A., Milićević, M., Jovanović, D., Gajić, R., Salom, I., Spasenović, M. 2D Materials, 2 (4), art. no. 045013, (2015) DOI: 10.1088/2053-1583/2/4/045013

Liquid dispersion of graphene in low-boiling point organic solvent

LBA FILMS and LIQUID DISPERSIONS - GRAPHENE AND OTHER 2D MATERIALS

We develope solution-processed dispersions of 2D materials such are graphene, MoS2, WS2, h-BN... Those are liquid dispersion of multi-layer sheets in various solvents (high-boiling point solvents and in low-boiling point solvents). Using LBA and LSA techinques we produce films on various substrates (Si/SiO2, glass, PET...) suitable for applications.

Read more: Enhanced sheet conductivity of Langmuir–Blodgett assembled graphene thin films by chemical doping
A. Matković, I Milošević, M Milićević, T Tomašević-Ilić, J Pešić, M Musić, M. Spasenović, Dj. Jovanović, B. Vasić, C. Deeks, R. Panajotović, M. Belić, R. Gajić
2D Materials 3 (1), 015002, (2016) DOI: 10.1088/2053-1583/3/1/015002

LBA film of graphene made from liquid dispersion in low-boiling point organic solvent

GRAPHENE-BASED SOLAR CELLS

We realized photovoltaic operation under variouse sun irradiation in LB/LS films from liquid phase exfoliated graphene by the formation heterojunction with n-Si. Under simulated sunlight irradiation, such as a heterojunction photovoltaic device achieves, a power conversion efficiency more than 5%, which is the higher efficiency among all solar cells based on solution-processed graphene dispersion. The results of these multilayer graphene films/Si-based solar cells hold the promise for integration of LB/LS films from liquid phase exfoliated 2D materials with commercially available Si-based electronics in highly efficient devices.

APPLICATION RESEARCH @GLAB

At GLAB we not only focus on fundamental research in solid state physics, but we strive to apply our knowledge to real-world technological solutions.

In that regard, we have collaborated with the industry to create the world’s first graphene microphone, that tops the performance of a professional commercial microphone. We are also exploring the applications of thin films of 2D materials obtained from liquid exfoliation – a method that allows large-scale production of 2D materials. A special focus is on printed electronics, solar cells and protective coatings.

We are always interested in cooperation with research groups as well as with industry. Feel free to contact us for further details.

Contact Us

Address: Institute of Physics,Pregrevica 118, Belgrade 11080 (Zemun) Serbia
Telephone:+381 11 3713190
FAX:+381 11 3160531
E-mail: graphene@ipb.ac.rs