Photo of Jianwu Sun

Jianwu Sun

Associate Professor, Head of Unit, Docent

Sun Research Group, Head of Semiconductor Materials division

Semiconductor Materials and Physics, Semiconductors for Solar Energy Conversion

Jianwu Sun holds a permanent position as Universitetslektor at IFM, Linköping University. He received his Docent (Associate Professor) title in 2016. Prior to this, he worked as Senior Researcher in the world-leading industrial research center, IMEC, Belgium. He has more than ten-year academic and industrial research experience on semiconductor materials.

Now, his research group mainly focuses on exploring the semiconductor materials such as cubic silicon carbide (3C-SiC) for solar-driven energy conversion, in particular, photocatalytic and photoelectrochemical (PEC) water splitting and reduction of CO2.

The solar-driven water splitting provides a promising way to produce hydrogen, which is regarded as a clean and renewable energy source. Moreover, the solar-driven conversion of CO2 and water into chemical fuels is also a very attractive approach to explore renewable energy by consuming and recycling the greenhouse gas CO2.



Hui Zeng, Jui-Che Chang, Yuanju Qu, Weimin Wang, Jens Birch, Ching-Lien Hsiao, Jianwu Sun (2024) Interface-Engineered InAlN/Cu2O Photocathode with Accelerated Charge Separation for Boosting Photoelectrochemical Water Splitting Solar RRL Continue to DOI


Jingxin Jian, Luo-Han Xie, Asim Mumtaz, Tom Baines, Jonathan D. Major, Qing-Xiao Tong, Jianwu Sun (2023) Interface-Engineered Ni-Coated CdTe Heterojunction Photocathode for Enhanced Photoelectrochemical Hydrogen Evolution ACS Applied Materials and Interfaces, Vol. 15, p. 21057-21065 Continue to DOI
Yuanju Qu, Mohammed M. Gomaa, Mohamed H. Sayed, Mostafa Boshta, Grzegorz Greczynski, Rositsa Yakimova, Jianwu Sun (2023) A Comparative Study of NiCo2O4, NiO, and Co3O4 Electrocatalysts Synthesized by a Facile Spray Pyrolysis For Electrochemical Water Oxidation Advanced Materials Interfaces Continue to DOI


Ivan Shtepliuk, Nikolaos Pliatsikas, Jingxin Jian, N. Ben Sedrine, Tihomir Iakimov, Kostas Sarakinos, Ivan Gueorguiev Ivanov, Jianwu Sun, Rositsa Yakimova (2021) Silver nanoparticle array on weakly interacting epitaxial graphene substrate as catalyst for hydrogen evolution reaction under neutral conditions Applied Physics Letters, Vol. 119, Article 153902 Continue to DOI
Jingxin Jian, Valdas Jokubavicius, Mikael Syväjärvi, Rositsa Yakimova, Jianwu Sun (2021) Nanoporous Cubic Silicon Carbide Photoanodes for Enhanced Solar Water Splitting ACS Nano, Vol. 15, p. 5502-5512 Continue to DOI


Semiconductors Materials, Physics and Devices, Semiconductors for Solar Energy Conversions

Photoelectrochemical water splitting and CO2 conversion based on 3C-SiC materials; Ga2O3 solar-blind Photodetectors and Transistors.

  • Photoelectrochemical Water Splitting and CO2 conversionScehamtic image of the research conducted in Jianwu Sun's research group

Photoelectrochemical (PEC) water-splitting offers a promising method to convert the intermittent solar energy into renewable and storable chemical energy. We focus on the development of cubic silicon carbide (3C-SiC) semiconductor as the photoelectrode for the solar-to-fuel conversion. 3C-SiC is a promising semiconductor for PEC water splitting due to its relatively small bandgap of 2.36 eV, which is close to the hypothetical ideal bandgap of 2.03 eV for the theoretical maximum of the solar water splitting efficiency. Most importantly, the conduction and valence band positions of 3C-SiC ideally straddle the water redox potentials.We also aim to tailor the properties of 3C-SiC by combination with other catalytic materials for improving the PEC conversion efficiency.

  • Ga2O3 Solar-blind Photodetectors and transistors

Ultraviolet (UV) photodetectors, in particular solar-blind photodetectors, have attract much attention because of its wide civil and military applications such as in non-line-of-sight optical communication, fire detection, chemical/biological analysis, and UV astronomy, etc. Gallium oxide, as a wide bandgap semiconductor material, has recently attracted much research interest because of its excellent physical properties such as the wide bandgap of ~4.9 eV and the extremely large breakdown electric field of 8 MV/cm. These promising material properties enable a wide device application prospect in transistor, solar-blind photodetector. Monoclinic phase gallium oxide (β-Ga2O3) is the most chemically and thermally stable material at room temperature among its five existing crystalline structures (α, β, γ, δ, and ε). Recently, it has been demonstrated that high quality 2 inch of gallium oxide single crystal can be grown. And it triggers a hot research field of solar-blind photodetectors and transistors based on gallium oxide.




Semiconductor for Solar Energy Conversion

The course is given to doctorate students or equivalents every fall.



A light-green thin sheet is immersed in water.

New material promising for making renewable energy from water

One prospective source of renewable energy is hydrogen gas produced from water with the aid of sunlight. LiU researchers have developed a material that exhibits promising properties to capture solar energy and split water for hydrogen gas production.

Mikhail Vagin and Penghui Ding working in the laboratory.

Fossil freedom comes from LiU labs

The transition to fossil freedom can’t happen overnight, but it can go much faster than it is. The technology is available, and in many cases is commercially available or nearly so. The labs at Linköping University hold hope for the future.

Renewable fuel from carbon dioxide with the aid of solar energy

Researchers at LiU are attempting to convert carbon dioxide, a greenhouse gas, to fuel using energy from sunlight. Recent results have shown that it is possible to use their technique to selectively produce methane, carbon monoxide or formic acid.