In case you are interested, please enquire about potential vacancies. Send your application (letter of motivation, curriculum vitae, list of publications, certificates/copies) to sec-hybrid-devices_@_hu-berlin.de.
Open Topics for Masters Theses in the Hybrid Device Group

Master Thesis - Resistive Hybrid Memory Elements 

Over the past decades a wide variety of organic and hybrid materials concepts have also been utilized as 2-terminal hysteretic elements in memory cells, including conjugated polymers, small molecules, and organic/hybrid materials. Despite the existence of a number of working device configurations a general and consistent explanation about all observations is still missing, making the reliable fabrication and engineering of the devices and their properties challenging and clearly limits widespread applications.

Thesis Topic 1 – Studying the Fundamentals of the Switching Process  
In this thesis a set of organic/hybrid material systems will be studied to elucidate the nature of the switching mechanism. The work will include device preparation, electrical characterisation and modelling of simple devices. 

For further details contact Dr. Giovanni Ligorio (giovanni.ligorio_@_hu-berlin.de)

Thesis Topic 2 – Studying Neuromorphic Behaviour in Hybrid Memristors 
In this thesis an existing configuration of an memristive memeory element based on an organic/hybrid material system will be studied under pulsed operation. In such a case the memristor exhibits similar behaviour as observed in biological synaptic systems. It will be the goal of this thesis to establish hybrid synapse/neuron circuits for neuromorphic systems. 
For further details contact Prof. Emil List-Kratochvil (emil.list-kratochvil_@_hu-berlin.de )

Master Thesis - Q-Teams in Physics and Chemistry 

We hereby invite undergraduate students with a Physics or Chemistry background to join our activities on “Advanced Charge Density Control in Electronic Materials”, which is part of a strategic partnership between National University of Singapore (NUS) as well as Princeton University (PU) and Humboldt-Universität zu Berlin (HU).  

Based on the “Q-Team Format” (see link) students will activelly take the lead in organizing and coordinating the work (with the help of PIs), and will be in frequent contact with our partners at NUS and PU. In addition to doing work at HU, students will be involved in student-exchanges for experiments and topically relevant workshops throughout the project lifetime. 

Q-Team NUS-HU - Electrostatic doping of 2D materials in device structures

Mono- and multilayer 2D nanosheet materials, such as graphene as well as MoS2 or WSe2, etc., are an emerging class of materials to be utilized as the active layer in electronic and optoelectronic device applications such as diodes, transistors or light emitting diodes. It is the goal of this Q-Team to investigate “built-in” electrostatic doping processes using self-assembled monolayers (SAMs) carrying permanent dipoles. Based on an interdisciplinary approach, this Q-Team will work on SAM synthesis, preparation and characterisation of 2D material preparation, device fabrication and characterisation as well as quantum chemical calculations and simulations.
For further details contact Prof. Emil List-Kratochvil (emil.list-kratochvil_@_hu-berlin.de )
Q-Team PU-HU: Heterojunctions formed between binary copper oxides and inorganic/organic semiconductors

The understanding and control of heterojunction energy level alignment lies at the core of modern electronic and optoelectronic devices. As examples, studies of organic/organic, organic/inorganic, and oxide/silicon interfaces are often exploited for photovoltaic applications. As part of this Q-Team heterojunctions of highly defined oxide layers will be investigated in heterojunctions with other inorganic and organic semiconductors. For this undertaking defined material deposition techniques such as atomic layer deposition or molecular beam epitaxy will be used for the growth of defect-free heterointerfaces. In addition, organic dipole layers may be further needed to manipulate the energy band alignment at the heterojunction. The investigation will be done using a surface-science approach in ultrahigh vacuum (UHV) using photoemission spectroscopy. 
For further details contact Dr. Giovanni Ligorio (giovanni.ligorio_@_hu-berlin.de)