Imperial College London


Faculty of Natural SciencesDepartment of Physics

Research Postgraduate







Blackett LaboratorySouth Kensington Campus





1. Project title: Controlling Charge Injection and Balance in Solution Processed PLEDs

2. Supervisor: Prof. Ji-Seon Kim

3. In this project, by blending a low amount of electrochemical doping agent (also called Ionic liquid), the hole injection was significantly enhanced, thereby balancing hole/electron currents, reducing turn-on voltages and improving device performance. OFET, SCLC and in-situ Bias Raman provided direct evidences for hole injection and electrochemical doping processes (Adv. Funct. Mater. 2019, 1904092).

4. I am also working on conjugated polyelectrolytes (CPE) as electron injection layer in PLEDs, Non-fullerene acceptor(NFA) based organic photodetector (OPD) and organic photovoltaic (OPV). 

From October to December 2019, I will work on beta-phase of blue polymers and conduct Single Molecule Spectroscopy in Prof Martin Vocha's group at Tokyo-Tech University, Japan. 

Selected Publications

Journal Articles

Yan H, Limbu S, Wang X, et al., 2019, Efficient charge carrier injection and balance achieved by low electrochemical doping in solution-processed polymer light-emitting diodes, Advanced Functional Materials, Vol:29, ISSN:1616-301X, Pages:1-9

More Publications