Bottom Interface Engineering for High Performance Perovskite Optoelectronic Devices by Prof Chen Shi

On 15 July 2024, the IAS and Graduate Students’ Club of EEE, MSE and SPMS jointly organised the STEM Graduate Colloquium titled Bottom Interface Engineering for High Performance Perovskite Optoelectronic Devices by Prof Chen Shi.

Prof Chen received his PhD from the Surface Science Lab at the National University of Singapore. He has held research positions at Nanyang Technological University and IMRE A*STAR. Currently, he is an assistant professor at the University of Macau, where he continues to advance our understanding of materials engineering.

He has made remarkable contributions to the field of materials interfaces, with a focus on perovskite and 2D materials. His innovative research includes in-situ and operando investigations of material interfaces for battery applications.

Prof Chen discussing his research to captivated audience.

Prof Chen began his presentation with the development of perovskite optoelectronic devices, emphasising the importance of interface engineering as well as several strategies in current research status for performance optimisation. He highlighted the significance of bottom interface and the gap that it has been less studied due to multiple requirement faced in device engineering, such as film formation, energy level alignment, and dual passivation.

Prof Chen then shared his ground-breaking work on bottom interface engineering, introducing his three strategies: dual ion passivation, graphene coverage, and substrate modification to achieve effective interfacial engineering. He detailed the characterisation results for each method, utilising techniques such as scanning electron microscopy (SEM), X-ray diffraction (XRD), grazing-incidence wide-angle X-ray scattering (GIWAXS), and X-ray photoelectron spectroscopy (XPS), among others. Based on the experimental results, he discussed in depth the impacts on perovskite thin films, including but not limited to crystallinity improvement, interfacial electronic structure, and organic substrate modification.

Prof Chen addressing questions from the audience during the Q&A session, providing deeper insights into characterisation results. 

The colloquium underscored Prof Chen’s pioneering research in perovskite optoelectronic device engineering, showcasing an inspiring presentation of cutting-edge developments in bottom interface engineering. The insights shared during the colloquium highlighted the systematic experimental strategies and practical applications of his research, sparking engaging discussions and shedding light on collaborative ideas among the audience.

 

Written by: Li Yujia  | NTU School of Materials Science and Engineering, Graduate Students' Club

“The talk is very relevant to my work.” - Darrell Tay Jun Jie (PhD candidate, IGP ERIAN-GC)

“It gave me new insights on interface engineering and perovskites.” - Elliot (PhD Student, EEE)

" In-depth presentation!" - Daniel Goh Yong Yi (PhD Student, MSE)

 

Watch the video recording.