Imperial College London

Mr Ching-Hong Tan

Faculty of Natural SciencesDepartment of Chemistry

Research Postgraduate



+44 (0)20 7594 5710c.tan12




Room 062ChemistrySouth Kensington Campus





Ching-Hong Tan started his PhD in research on organic photovoltaics (OPVs) under the supervision of Prof. James Durrant in Jan 2014. 

An OPV cell is made up of an active layer sandwiched between two electrodes. The active layer, which converts photons to charges, comprises polymer donor and fullerene derivative acceptor. In this connection, his work focuses primarily on studying different non-fullerene acceptors (NFAs) as an alternative to the fullerene derivative acceptor in the active layer.

Tan’s research comprises both academic and industrial potential. In respect of the former, this research delivers an understanding of the formation of the blend (polymeric donor and NFA) morphology for optimized device performance. The device performance is correlated with the active layer charge generation and transport properties. Furthermore, this study also has industrial potential to substitute the high cost fullerene derivatives in commercialized OPV devices. He acquired measurement techniques such as photoluminescence (PL) and transient absorption spectroscopies (TAS), transmission electron microscope (TEM), X-ray diffraction (XRD) and atomic force microscope (AFM).

Prior to beginning his PhD, Tan completed his MRes with distinction in Nanomaterials. His study was to compare the application of wire bar coating to the general spin coating technique in OPV device fabrication and device thermal stability. Throughout his research, he gained experience in fabricating OPV device and assessing the device with solar simulator (current density – voltage characteristics) and External Quantum Efficiency (EQE) measurements. At the same time he developed an interest to continue his study in his current group.

Tan obtained his BSc with First Class Honours in Chemistry from University Malaysia Sarawak (UNIMAS). His project focused on the synthesis of iron oxide and manganese ferrite nanoparticles using a variety of environmentally friendly approaches to control their size and shape for biomedical and electrical applications.

In his spare time, he plays sport (basketball, running and swimming) and the saxophone. He enjoys learning different languages and meeting people from around the world.




Tan C-H, Gorman J, Wadsworth A, et al., 2018, Barbiturate end-capped non-fullerene acceptors for organic solar cells: tuning acceptor energetics to suppress geminate recombination losses., Chem Commun (camb)

Speller EM, McGettrick JD, Rice B, et al., 2017, Impact of Aggregation on the Photochemistry of Fullerene Films: Correlating Stability to Triplet Exciton Kinetics, Acs Applied Materials & Interfaces, Vol:9, ISSN:1944-8244, Pages:22739-22747

Collado-Fregoso E, Deledalle F, Utzat H, et al., 2017, Photophysical Study of DPPTT-T/PC70BM Blends and Solar Devices as a Function of Fullerene Loading: An Insight into EQE Limitations of DPP-Based Polymers, Advanced Functional Materials, Vol:27, ISSN:1616-301X

Holliday S, Ashraf RS, Wadsworth A, et al., 2016, High-efficiency and air-stable P3HT-based polymer solar cells with a new non-fullerene acceptor, Nature Communications, Vol:7, ISSN:2041-1723

Li Z, Chiu KH, Ashraf RS, et al., 2015, Toward Improved Lifetimes of Organic Solar Cells under Thermal Stress: Substrate-Dependent Morphological Stability of PCDTBT:PCBM Films and Devices, Scientific Reports, Vol:5, ISSN:2045-2322

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