Available PhD Projects
Fully funded PhD studentships are available (2017 Entry)!
The exciting projects on offer with Prof Ji-Seon Kim in 2017 are detailed below! Please e-mail Ji-Seon Kim for more information.
|Project Number: JSK 1|
|The project aims to develop innovative solution-processed (printed) organic sensors which enable to make fine discrimination of various external stimuli (gas, pressure, light, bio signal), ultimately facilitating the ubiquitous information system along with consumer electronics, bio-medical applications, smart buildings. We will employ a new cooperative stimulus-to-signal transducer (CSST) system comprising ionic liquid electrolytes as a stimulus receptor and pi-conjugated polymers as a signal deliver, to form an interpenetrating network at a molecular level critical for a fast stimulus-to-signal transducing with high sensitivity, responsibility and reliability. We will focus on materials design/synthesis, materials/device characterisation, and platform technology development. The success of this project will offer a new class of materials for printed sensor applications, as well as will provide significant intellectual merit by unveiling fundamental device operational mechanism.|
Efficient and Stable Organic NIR Photodetectors co-supervised with Prof Martin Heeney (Chemistry, Imperial)
|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.