Xue Hansong

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Telephone: +65 6499 4519
Research Background:
Chemistry, Mathematics,

Pillar / Cluster: Science, Mathematics and Technology

Xue Hansong


Hansong was a Singapore MOE scholar at ACS(I) and ACJC from 2000 to 2004. He then enrolled at the National University of Singapore (NUS) for his undergraduate studies in Mathematics in 2005. After achieving his BSc with first-class Honors in Mathematics in 2009, he pursued dual MSc degrees in Mathematics at NUS and Chemistry at Nanyang Technological University (NTU) in 2011 and 2015, respectively.

In 2019, he successfully earned his PhD in Chemical & Biomolecular Engineering from NUS. Following this, he led both the thin-film modeling team and the novel cell concepts simulation team at the Solar Energy Research Institute of Singapore. He held these positions from 2019 to 2021 and was engaged in various projects related to the development of new materials for thin film PV applications, as well as module technologies for future integrated PV applications.

In 2022, he became a part of Cambridge CARES, where his focus shifted towards the development of Digital Twin technology, aimed at reducing carbon footprints. Additionally, he played a pivotal role in the Cooling Singapore project, lending his expertise as an energy specialist to formulate solutions addressing the challenges posed by anthropogenic heat in Singapore.

Hansong’s research interests encompass solar photovoltaics, transport phenomena, applied machine learning, and knowledge graphs. Presently, he holds the position of Lecturer in the Science, Mathematics, and Technology Cluster at Singapore University of Technology and Design (SUTD).


  • PhD in Chemical and Biomolecular Engineering, National University of Singapore, 2019
  • MSc in Chemistry, Nanyang Technological University, 2015
  • MSc in Mathematics, National University of Singapore, 2011
  • BSc in Mathematics (First Class Honors), National University of Singapore, 2009

Research Interest

  • Solar Photovoltaics
  • Transport Phenomena
  • Applied Machine Learning
  • Knowledge Graphs

Selected Publications

[#equal contributions, *corresponding author]

  • X. Zhao, H. Q. Tan, E. Birgersson, Y. Hou, H. Xue*, A mixed-integer optimization for bifacial two-terminal perovskite-on-perovskite tandem solar cells, Solar Energy, 262, 111905 (2023).
  • H. Q. Tan, H. Liang, M. Krause, X. Zhao, R. K. Kothandaraman, C. Romain, A. N. Tiwari, F. Fu, E. Birgersson*, Y. Hou*, H. Xue*, Accounting for Fabrication Variability in Transparent Perovskite Solar Cells for Four-Terminal Tandem Applications, Solar RRL, 2300339 (2023).
  • X. Zhao, H. Q. Tan, E. Birgersson, W. Chen, Y. Hou, H. Xue*, Modeling and sensitivity analysis of a two-terminal perovskite on organic tandem solar cell, Cell Reports Physical Science, 3, 101038 (2022).
  • W. Chen, Y. Zhu, J. Xiu, G. Chen, H. Liang, S. Liu, H. Xue, E. Birgersson, J. W. Ho, X. Qin, J. Lin, R. Ma, T. Liu, Y. He, A. M. Ng, X. Guo, Z. He, H. Yan, A. B. Djurišić, Y. Hou, Monolithic perovskite/organic tandem solar cells with 23.6% efficiency enabled by reduced voltage losses and optimized interconnecting layer, Nature Energy, 7, 229-237 (2022).
  • H. Q. Tan, X. Zhao, E. Birgersson, H. Xue*, Optimizing Bifacial All-Perovskite Tandem Solar Cell: How to Balance Light Absorption and Recombination, Solar Energy, 231, 1092-1106 (2022).
  • X. Zhao, H. Q. Tan, E. Birgersson, H. Xue*, Elucidating the underlying physics in a two-terminal all-perovskite tandem solar cell: a comprehensive guideline towards the Shockley-Queisser limit, Solar Energy, 231, 716-731 (2022).
  • H. Q. Tan, X. Zhao, E. Birgersson, F. Lin, H. Xue*, Optoelectronic modelling and sensitivity analysis of a four-terminal all-perovskite tandem solar cell – identifying pathways to improve efficiency, Solar Energy, 216, 589-600 (2021).
  • Z. Ren, F. Oviedo, M. Thway, S. Tian, Y. Wang, H. Xue, J. D. Perea, M. Layurova, T. Heumueller, E. Birgersson, A. Aberle, C. J. Brabec, R. Stangl, S. Sun, Q. Li, F. Lin, I. M. Peters, T. Buonassisi, Embedding physics domain knowledge into a Bayesian network enables layer-by-layer process innovation for photovoltaics, npj Computational Materials, 6, 9 (2020).
  • L. Zheng, H. Xue#, W. K. Wong, H. Cao, J. Wu, S. A. Khan, Cloud-inspired multiple scattering for light intensified photochemical flow reactors, Reaction Chemistry & Engineering, 5, 1058-1063 (2020).
  • H. Xue, R. Stangl, E. Birgersson, Elucidating the functional form of the recombination losses in a planar perovskite solar cell: a scaling analysis, Journal of Applied Physics, 128, 123102 (2020).
  • H. Xue, E. Birgersson, R. Stangl, Correlating variability of modeling parameters with photovoltaic conversion efficiency: Monte Carlo simulation of a meso-structured perovskite solar cell, Applied Energy, 237, 131(2019).
  • H. Xue, E. Birgersson, R. Stangl, A spatially smoothed device model for meso-structured perovskite solar cells, Journal of Applied Physics, 124, 193103 (2018).
  • H. Xue, K. Fu, L. H. Wong, E. Birgersson, R. Stangl, Modelling and loss analysis of meso-structured perovskite solar cells, Journal of Applied Physics, 122, 083105 (2017).
  • H. Xue, C. H. Tan, M.W. Wong. Guanidine-catalyzed asymmetric Strecker reaction: Modes of activation and origin of stereoselectivity, Canadian Journal of Chemistry, 94(12), 1099 (2016).
  • H. Xue, D. F. Jiang, H. Jiang, C. W. Kee, H. Hirao, T. Nishimura, M. W. Wong, C. H. Tan. Mechanistic Insights of Chiral Bicyclic Guanidine-catalyzed Enantioselective Reactions from Microscopic and Macroscopic Perspectives, Journal of Organic Chemistry, 80, 5745-5752 (2015).


  • Research Scholarship, Nanyang Technological University (2014-2015)
  • President Graduate Scholarship, National University of Singapore (2010-2011)
  • Singapore Government Undergraduate Scholarship, Ministry of Education (2005-2009)
  • Baden-Württemberg Scholarship, Karlsruhe Institute of Technology, Germany (2007-2008)
  • NASA Exchange Awards, National University of Singapore (2007-2008)
  • Faculty of Science Dean’s List, National University of Singapore (2005–2006)