Fully funded PhD studentships are available (2018 Entry)!

The exciting projects on offer with Prof Ji-Seon Kim in 2018 are detailed below! Please e-mail Ji-Seon Kim for more information. 

Post-doc recruitment

We are recruiting a post-doc who will carry out research into “Organic and Hybrid Electronic Materials and Devices for Photovoltaic and Photosensor Applications” under Global Research Laboratory (GRL) programme funded by National Research Foundation of Korea (NRF). This position is for 2 years starting as soon as possible after an interview in September.

This research will focus on: (1) the interfacial energetics, (2) the photogenerated charge carrier dynamics, and (3) the origin of traps (molecular, interfacial, and/or morphological), and their impact on device performance. 


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Organic Bioelectronics

Project Number:  JSK 1

A recent trend in neuromorphic engineering involves the use of devices based on organic electronic materials. This is largely motivated by the attractive characteristics organic devices offer in interfacing electronics with biology. Key advantages of organic-based materials include their compatibility with low cost processing on large area, mechanically-flexible substrates that can be conformal to the body as well as the tunability of their properties via blending and chemical synthesis. The aim of the proposal is to develop organic-based composites and implement neuromorphic device architectures suitable for the processing of biological signals with a view towards applications in the field of wearable electronics, health monitoring, and neural prosthesis.

This project will be supervised by Prof Ji-Seon Kim (Physics, Imperial College) and Prof George Malliaras (Department of Engineering, University of Cambridge).

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Organic Near-IR Sensors

Project Number:  JSK 2

Organic sensor devices such as organic photodetectors (OPDs) are important optoelectronic applications using organic semiconductors as a light detecting active medium. OPDs have attracted significant interest in the last two decades due to the possibility for using them for a variety of industrial and scientific applications such as environmental monitoring, communications, remote control, surveillance, and chemical/ biological sensing, with low-cost, light-weight, high efficiency and high environmental friendliness. For OPD applications, it is critical for organic semiconductors to have efficient light harvesting (with high photocurrent and low dark current) and high spectral selectivity (from UV to NIR/IR) properties. Although the rich variety of organic compounds with their absorption spanning from the UV to NIR offers unique possibilities for these required properties, organic semiconductors with a large photoresponse at NIR spectral ranges (>700 nm) with efficient light harvesting and air stability are still very difficult to find. In this project, we will develop key fundamental understanding of organic sensor materials towards high-performance and high-stability NIR photodetector applications. Our particular attention will be paid to; (1) investigating optoelectronic properties of new organic photodetector materials (low-band gap conjugated polymer donors and non-fullerene acceptors), (2) controlling and characterising the thin film nanostructures formed in donor-acceptor blends and bilayers, and (3) fabricating highly efficient and stable organic NIR photodetectors by utilising various charge transport/ extraction organic and hybrid materials as an interlayer in a device.

Organic and Hybrid Thin Film Solar Cells

Project Number:  JSK 3

Continuous increase in the device performance of organic and hybrid (including perovskites) solar cells is strongly related to better understanding of optical and electronic properties of the photoactive layer. There are still many electronic processes in organic/organic and organic/inorganic layers that are critical to device performance (e.g. charge carrier generation/recombination, trapping of electrons and holes, and ionic movement) and are not yet fully understood. This project aims to investigate these important electronic processes in terms of their energy levels and the illumination generated surface photovoltage and its transient behaviour. For this, Ambient pressure air photoemission spectroscopy and Kelvin Probe-based surface photovoltage techniques will be used.