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/Job opportunities/Transport layers for thin film optoelectronic devices based on lead halide perovskites

Transport layers for thin film optoelectronic devices based on lead halide perovskites

PhD - Genk | More than two weeks ago

Design and fabricate transport layers for optimized charge collection and power conversion in perovskite based optoelectronic devices 

Introduction
Within an unprecedented short time, lead halide perovskites have been proven to be viable candidates for active materials in future optoelectronic devices. Starting from their application in thin film solar cells with record high power conversion efficiencies, these class of perovskites have been integrated with great success in photodetectors, transistors, light emitting diodes and lasers. It is the target of an optoelectronic device to have an optimal conversion of photon energy into electrical energy or vice versa. Charge transport layers are an essential part to ensure high device performance. Besides ensuring a high carrier mobility, they need to contribute to effective interfaces between electrical contacts on one side and the perovskite layer on the opposite. Furthermore, these layers exhibit very low extinction coefficients in the relevant wavelength range and their processing conditions are compatible with the other device materials.
At imec and Energyville we develop state-of-the-art large area solar cells and modules for maximum power conversion efficiencies, sub-micrometer pixels for high resolution imagers, and ultra-bright light emitting diodes for micro-displays and photonic circuits – all based on the same class of perovskites.
It is the target of this PhD, to further improve these devices by developing new layer architectures and fabrication processes with a focus on transport layers. Based on a wide range of experience on solution and vacuum based processes of oxides and organic materials, we want to develop transport layers for an optimized charge extraction in photodetectors and tandem solar cells. At a later stage, light emitting diodes and lasers can be an extension of the research applications.

Topic
This PhD is highly experimental and consists of two parts: thin film fabrication and characterization. You feel comfortable in a lab environment working with vacuum processes and electrical and optical characterization tools. At Energyville, you work on tools that are targeted for large area processing. You have the chance to gain insights in a wide range of thin film fabrication methods and the subsequent analysis. 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 a 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 spanning several imec departments. 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: Device Physics, Electrical Engineering, Material Science 

Type of work: 10% literature study, 80% experimental, 10% modeling 

Supervisor: Jan Genoe

Co-supervisor: Jef Poortmans 

Daily advisor: Yinghuan Kuang 

The reference code for this position is 2021-139. Mention this reference code on your application form.