/Electrical gain modulation in perovskite thin films

Electrical gain modulation in perovskite thin films

Leuven | More than two weeks ago

Unlock the capabilities of large area lasers by controlled switching of the material properties of the active medium


At imec, we have recently demonstrated the electrical excitation of perovskite films close to the threshold density of stimulated emission.  Passing the milestone of electrical injection lasing, this technology can provide fully wafer integrated light sources.  Such thin film laser diodes can be the first large lasers opening new application tracks for optical amplifiers or surface emitting devices. By generating and controlling an electric field over such devices we can vary net gain within the devices. In the proposed PhD project, we want to develop specific device geometries and control strategies to explore the limits of these methods in view of magnitude and speed.

Within an unprecedented short time, lead halide perovskites have been proven to be viable candidates for active materials in future optoelectronic devices. They show extraordinary performance as gain media in thin film lasers and withstand extremely high current densities under electrical pumping. At imec, we produce state-of-the-art perovskite thin film lasers and have sophisticated electro-optical characterization setups to gain a deep understanding of these systems.

It is the goal of this PhD, to combine electrical and optical pumping schemes to explore the material and device properties beyond the current knowledge.


This PhD is going to combine experiment with theory. You prepare thin film devices based on existing recipes followed by the electro-optical characterization which includes the modification and enhancement of current setups. You feel comfortable in a lab environment working with solution based and vacuum processes and electrical and optical characterization tools. Ideally, you have some background in optical simulation (FDTD, FEM), which is required for the detailed analysis and understanding. Overall, you are curious and motivated to explore the fascinating world of perovskite lasers and with their wide range of potential applications – all this in the environment of a leading research institution. Together we define the relevant target parameters to ensure an efficient development process.

At all stages of the work, you can rely on the support of our highly skilled team of engineers and scientists.

The candidate

You have recently finished your studies with a master’s degree in material science, semiconductor physics, electrical engineering, nano-engineering, or related. You are highly motivated to dive with us into the world of thin film processing for optoelectronic devices. You are a hands-on person in a lab environment and have creativity that helps you in problem solving and data analysis. You are a team player and have good communication skills as you will work in a multidisciplinary and multicultural team. You have the chance to regularly present your results thus getting guidance and feedback from our team. Given the international character of imec, an excellent knowledge of English is a must.

Required background: Physics, Electrical engineering, Material science.

Type of work: 40% experimental, 50% modeling/simulation, 10% literature

Supervisor: Jan Genoe

Co-supervisor: Paul Heremans

Daily advisor: Robert Gehlhaar

The reference code for this position is 2024-140. Mention this reference code on your application form.

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