Dr Yimao Wan
Research interests
- Surface passivaiton
- Carrier selective contacts
- Silicon solar cells
- Perovskite/Si tandem cells
- Photovoltaic based photoelectrochemical water splitting
Biography
Dr Yimao Wan (ANU) has over 13 years’ experience as researcher and project manager in semiconductor and photovoltaics. He received the B.E. degree from the Nanyang Technological University, Singapore in 2004, and PhD degree from the Australian National University in 2014. His PhD thesis on the passivation of silicon surfaces by silicon nitride was awarded the best thesis prize in the Solar Canberra. Since then, he has been working at the ANU as a research fellow, coordinating a large ARENA-Trina project (~$2 million) from grant application to daily activity management. Dr Wan has a proven track-record of 60 scientific publications in international conferences and peer-reviewed journals.
Researcher's projects
- ARENA project partnered with TrinaSolar working on novel passivating materials for high efficiency silicon solar cells
- ARC Discovery Project partnered with École polytechnique fédérale de Lausanne working on TCO based carrier selective contacts
- AUSIAPV project partnered with University of Berkeley working on developing advanced hole transport materials for silicon solar cells
Publications
- Liu, A, Hameiri, Z, Wan, Y et al 2019, 'Gettering Effects of Silicon Nitride Films from Various Plasma-Enhanced Chemical Vapor Deposition Conditions', IEEE Journal of Photovoltaics, vol. 9, no. 1, pp. 78-81.
- Zeng, Y, Yang, Q, Wan, Y et al 2019, 'Numerical exploration for structure design and free-energy loss analysis of the high-efficiency polysilicon passivated-contact p-type silicon solar cell', Solar Energy, vol. 178, pp. 249-256.
- Kho, T, Fong, K, McIntosh, K et al. 2019, 'Exceptional silicon surface passivation by an ONO dielectric stack', Solar Energy Materials and Solar Cells, vol. 189, pp. 245-253.
- He, J, Hossain, M, Lin, H et al. 2019, '15% Efficiency Ultrathin Silicon Solar Cells with Fluorine-Doped Titanium Oxide and Chemically Tailored Poly(3,4-ethylenedioxythiophene):Poly(styrenesulfonate) as Asymmetric Heterocontact', ACS Nano, vol. 13, no. 6, pp. 6356-6362.
- Peng, J, Khan, J, Liu, W et al 2018, 'A Universal Double-Side Passivation for High Open-Circuit Voltage in Perovskite Solar Cells: Role of Carbonyl Groups in Poly(methyl methacrylate)', Advanced Energy Materials, vol. 8, no. 30, pp. 1-9pp.
- Wan, Y, Hsiao, P, Zhang, W et al. 2018, 'Laser-Patterned n-Type Front-Junction Silicon Solar Cell With Tantalum Oxide/Silicon Nitride Passivation and Antireflection', RRL Solar, vol. 2, no. 2.
- Hui, T, Liao, M, Zhang, Z et al. 2018, 'A strong-oxidizing mixed acid derived high-quality silicon oxide tunneling layer for polysilicon passivated contact silicon solar cell', Solar Energy Materials and Solar Cells, vol. 188, pp. 149-155pp.
- Shen, H, Omelchenko, S, Jacobs, D et al. 2018, 'In situ recombination junction between p-Si and TiO2 enables high-efficiency monolithic perovskite/Si tandem cells', Science Advances, vol. 4, no. 12, pp. 1-12pp.
- Yang, X, Aydin, E, Xu, H et al. 2018, 'Tantalum Nitride Hole-Blocking Layer for Efficient Silicon Solar Cells', 7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018, IEEE, United States, pp. 2087-2091pp.
- Bullock, J, Wan, Y, Xu, Z et al 2018, 'Stable Dopant-Free Asymmetric Heterocontact Silicon Solar Cells with Efficiencies above 20%', ACS Energy Letters, vol. 3, no. 3, pp. 508-513pp.
- Bullock, J, Wan, Y, Xu, Z et al 2018, 'Stable Dopant-Free Asymmetric Heterocontact Silicon Solar Cells with Efficiencies above 20%', ACS Energy Letters, vol. 3, no. 3, pp. 508-513pp.
- Wan, Y, Bullock, J, Hettick, M et al 2018, 'Zirconium oxide surface passivation of crystalline silicon', Applied Physics Letters, vol. 112, no. 20, pp. 4pp.
- Yang, X, Aydin, E, Xu, H et al 2018, 'Tantalum Nitride Electron-Selective Contact for Crystalline Silicon Solar Cells', Advanced Energy Materials, vol. 8, no. 20, pp. 7pp.
- Cuevas, A, Wan, Y, Yan, D et al 2018, 'Carrier population control and surface passivation in solar cells', Solar Energy Materials and Solar Cells, vol. 184, pp. 38-47pp.
- Wan, Y, Bullock, J, Hettick, M et al. 2018, 'Temperature and Humidity Stable Alkali/Alkaline-Earth Metal Carbonates as Electron Heterocontacts for Silicon Photovoltaics', Advanced Energy Materials, vol. 8, no. 22, pp. 1-6.
- Yan, D, Cuevas, A, Phang, S et al. 2018, '23% efficient p-type crystalline silicon solar cells with hole-selective passivating contacts based on physical vapor deposition of doped silicon films', Applied Physics Letters, vol. 113, no. 6, pp. 4pp.
- He, J, Wan, Y, Gao, P et al 2018, 'Over 16.7% Efficiency Organic-Silicon Heterojunction Solar Cells with Solution-Processed Dopant-Free Contacts for Both Polarities', Advanced Functional Materials, vol. 28, no. 34, pp. 8pp.
- Zhang, T, Lee, C, Wan, Y et al 2018, 'Investigation of the thermal stability of MoOx as hole-selective contacts for Si solar cells', Journal of Applied Physics, vol. 124, no. 7, pp. 7pp.
- Wan, Y, Karuturi, S, Samundsett, C et al 2018, 'Tantalum Oxide Electron-Selective Heterocontacts for Silicon Photovoltaics and Photoelectrochemical Water Reduction', ACS Energy Letters, vol. 3, no. 1, pp. 125-131pp.
- Tong, J, Wan, Y, Cui, J et al. 2017, 'Solution-processed molybdenum oxide for hole-selective contacts on crystalline silicon solar cells', Applied Surface Science, vol. 423, pp. 139-146pp.
- Cui, J, Wan, Y, Cui, Y et al. 2017, 'Highly effective electronic passivation of silicon surfaces by atomic layer deposited hafnium oxide', Applied Physics Letters, vol. 110, no. 2, pp. -.
- Allen, T, Bullock, J, Jeangros, Q et al. 2017, 'A Low Resistance Calcium/Reduced Titania Passivated Contact for High Efficiency Crystalline Silicon Solar Cells', Advanced Energy Materials, vol. 7, no. 12, pp. 1-7pp.
- Wan, Y, Samundsett, C, Bullock, J et al. 2017, 'Conductive and Stable Magnesium Oxide Electron-Selective Contacts for Efficient Silicon Solar Cells', Advanced Energy Materials, vol. 7, no. 5, pp. 1-7pp.
- Peng, J, Wu, Y, Ye, W et al. 2017, 'Interface passivation using ultrathin polymer–fullerene films for high-efficiency perovskite solar cells with negligible hysteresis', Energy and Environmental Science, vol. 10, no. 8, pp. 1792-1800pp..
- Bullock, J, Ota, H, Wang, H et al 2017, 'Microchannel contacting of crystalline silicon solar cells', Scientific Reports, vol. 7, no. 1, pp. 9085 (9pp).
- Bullock, J, Ota, H, Wang, H et al 2017, 'Microchannel contacting of crystalline silicon solar cells', Scientific Reports, vol. 7, no. 1, pp. 9085 (9pp).
- Wu, Y, Yan, D, Peng, J et al. 2017, 'Monolithic perovskite/silicon-homojunction tandem solar cell with over 22% efficiency', Energy and Environmental Science, vol. 10, pp. 2472-2479pp.
- Cui, J, Phang, S, Sio, H et al. 2017, 'Passivation of Phosphorus Diffused Black Multi-Crystalline Silicon by Hafnium Oxide', Physica Status Solidi: Rapid Research Letters, vol. 11, no. 12, pp. 1-5pp.
- Allen, T, Bullock, J, Zheng, P et al. 2017, 'Calcium contacts to n-type crystalline silicon solar cells', Progress in Photovoltaics: Research and Applications, vol. 25, no. 7, pp. 636-644.
- Peng, J, Duong, T, Zhou, X et al. 2017, 'Efficient Indium-Doped TiOx Electron Transport Layers for High-Performance Perovskite Solar Cells and Perovskite-Silicon Tandems', Advanced Energy Materials, vol. 7, no. 4, pp. 1-10.
- Zheng, P, Rougieux, F, Samundsett, C et al. 2016, 'Simulation of 20.96% Efficiency n-type Czochralski UMG Silicon Solar Cell', 6th International Conference on Crystalline Silicon Photovoltaics, SiliconPV 2016, ed. A Weeber, J Poortmans, Elserier, TBC, pp. 434-442.
- Bullock, J, Zheng, P, Jeangros, Q et al. 2016, 'Lithium Fluoride Based Electron Contacts for High Efficiency n-Type Crystalline Silicon Solar Cells', Advanced Energy Materials, vol. 6, no. 14, pp. -.
- Zhang, X, Wan, Y, Bullock, J et al 2016, 'Low resistance Ohmic contact to p-type crystalline silicon via nitrogen-doped copper oxide films', Applied Physics Letters, vol. 109, no. 5, pp. 1-4.
- Wan, Y, Samundsett, C, Yan, D et al. 2016, 'A magnesium/amorphous silicon passivating contact for n-type crystalline silicon solar cells', Applied Physics Letters, vol. 109, no. 11, pp. -.
- Allen, T, Wan, Y & Cuevas, A 2016, 'Silicon Surface Passivation by Gallium Oxide Capped With Silicon Nitride', IEEE Journal of Photovoltaics, vol. 6, no. 4, pp. 900-905.
- Wan, Y, Samundsett, C, Bullock, J et al. 2016, 'Magnesium Fluoride Electron-Selective Contacts for Crystalline Silicon Solar Cells', ACS Applied Materials and Interfaces, vol. 8, no. 23, pp. 14671-14677.
- Nguyen, H, Rougieux, F, Yan, D et al 2016, 'Characterizing amorphous silicon, silicon nitride, and diffused layers in crystalline silicon solar cells using micro-photoluminescence spectroscopy', Solar Energy Materials and Solar Cells, vol. 145, no. 3, pp. 403-411pp.
- Grant, N, Lu, Z, Wan, Y et al 2016, 'Manipulation of stored charge in anodic aluminium oxide/SiO2 dielectric stacks by the use of pulsed anodisation', Applied Surface Science, vol. 363, pp. 296-302.
- Yan, D, Cuevas, A, Wan, Y et al 2016, 'Passivating contacts for silicon solar cells based on boron-diffused recrystallized amorphous silicon and thin dielectric interlayers', Solar Energy Materials and Solar Cells, vol. 152, pp. 73-79.
- Cui, J, Allen, T, Wan, Y et al. 2016, 'Titanium oxide: A re-emerging optical and passivating material for silicon solar cells', Solar Energy Materials and Solar Cells, vol. 158, pp. 115-121pp.
- Zheng, P, Rougieux, F, Samundsett, C et al. 2016, 'Upgraded metallurgical-grade silicon solar cells with efficiency above 20%', Applied Physics Letters, vol. 108, no. 12.
- Bullock, J, Wan, Y, Hettick, M et al 2016, 'Survey of Dopant-Free Carrier-Selective Contacts for Silicon Solar Cells', 43rd IEEE Photovoltaic Specialists Conference, PVSC 2016, IEEE Xplore, Online, pp. 210-213pp.
- Allen, T, Zheng, P, Vaughan, B et al. 2016, 'Low resistance TiO2-passivated calcium contacts to for crystalline silicon solar cells', 43rd IEEE Photovoltaic Specialists Conference, PVSC 2016, IEEE Xplore, Online, pp. 230-233pp.
- Wan, Y, Samundsett, C, Bullock, J et al. 2016, 'Magnesium Fluoride Based Electron-Selective Contact', 43rd IEEE Photovoltaic Specialists Conference, PVSC 2016, IEEE Xplore, Online, pp. 2540-2542pp.
- Bullock, J, Samundsett, C, Cuevas, A et al 2015, 'Proof-of-concept p-type silicon solar cells with molybdenum oxide partial rear contacts', IEEE Photovoltaic Specialist Conference, PVSC 2015, IEEE, TBC, pp. 4pp.
- Yan, D, Cuevas, A, Bullock, J et al 2015, 'Silicon nitride/silicon oxide interlayers for solar cell passivating contacts based on PECVD amorphous silicon', Physica Status Solidi: Rapid Research Letters, vol. 9, no. 11, pp. 617-621.
- Wan, Y, Yan, D, Bullock, J et al 2015, 'Passivation of c-Si surfaces by sub-nm amorphous silicon capped with silicon nitride', Applied Physics Letters, vol. 107, no. 23.
- Bullock, J, Samundsett, C, Cuevas, A et al 2015, 'Proof-of-Concept p-Type Silicon Solar Cells with Molybdenum Oxide Local Rear Contacts', IEEE Journal of Photovoltaics, vol. 5, no. 6, pp. 1591-1594.
- Thomson, A, Lal, N & Wan, Y 2015, 'Interpolating the optical properties of varied composition silicon nitride', Physica Status Solidi. B: Basic Research, vol. 252, no. 10, pp. 2230-2235.
- Bullock, J, Yan, D, Cuevas, A et al 2015, 'N- and p-type silicon Solar Cells with Molybdenum Oxide Hole Contacts', Energy Procedia, vol. 77, pp. 446-450.
- Cuevas, A, Allen, T, Bullock, J et al 2015, 'Skin care for healthy silicon solar cells', IEEE Photovoltaic Specialist Conference, PVSC 2015, IEEE, TBC, pp. 6pp.
- Yan, D, Cuevas, A, Bullock, J et al 2015, 'Phosphorus-diffused polysilicon contacts for solar cells', Solar Energy Materials and Solar Cells, vol. 142, pp. 75-82.
- Thomson, A, Wan, Y, Lal, N et al. 2015, 'Graded silicon nitride films: Optics and passivation', Journal of Vacuum Science and Technology A, vol. 33, no. 6, pp. 060610-1 to 060610-5.
- Lu, Z, Ouyang, Z, Grant, N et al 2015, 'Manipulation of stored charge density and polarity in anodic aluminium oxide for silicon solar cell passivation', Energy Procedia, vol. 77, pp. 816-821.
- Wan, Y, Bullock, J & Cuevas, A 2015, 'Passivation of c-Si surfaces by ALD tantalum oxide capped with PECVD silicon nitride', Solar Energy Materials and Solar Cells, vol. 142, pp. 42-46.
- Wan, Y, Bullock, J & Cuevas, A 2015, 'Tantalum oxide/silicon nitride: A negatively charged surface passivation stack for silicon solar cells', Applied Physics Letters, vol. 106, no. 20, pp. 1-4.
- Bullock, J, Cuevas, A, Samundsett, C et al 2015, 'Simple silicon solar cells featuring an a-Si:H enhanced rear MIS contact', Solar Energy Materials and Solar Cells, vol. 138, pp. 22-25.
- Wan, Y, McIntosh, K, Thomson, A et al 2015, 'Recombination and thin film properties of silicon nitride and amorphous silicon passivated c-Si following ammonia plasma exposure', Applied Physics Letters, vol. 106, no. 4, pp. 1-4pp.
- Grant, N, Rougieux, F, MacDonald, D et al 2015, 'Grown-in defects limiting the bulk lifetime of p-type float-zone silicon wafers', Journal of Applied Physics, vol. 117, no. 5, pp. 1-8pp.
- Wan, Y, Samundsett, C, Kho, T et al. 2014, 'Towards industrial advanced front-junction n-type silicon solar cells', 40th IEEE Photovoltaic Specialist Conference, PVSC 2014, IEEE, USA, pp. 862-865.
- Yan, D, Cuevas, A, Bullock, J et al 2014, 'Development of a self-aligned etch-back process for selectively doped silicon solar cells', 40th IEEE Photovoltaic Specialist Conference, PVSC 2014, IEEE, USA, pp. 2545-2549.
- Wan, Y, Yan, D, Cuevas, A et al 2014, 'Influence of the NH3:SiH4 ratio and surface morphology on the surface passivation of phosphorus-diffused C-Si by PECVD SiNx', 40th IEEE Photovoltaic Specialist Conference, PVSC 2014, IEEE, USA, pp. 3317-3321.
- McIntosh, K, Kho, T, Fong, K et al. 2014, 'Quantifying the optical losses in back-contact solar cells', 40th IEEE Photovoltaic Specialist Conference, PVSC 2014, IEEE, USA, pp. 115-123.
- Zhang, X, Hargreaves, S, Wan, Y et al 2014, 'Surface passivation of crystalline silicon by sputter deposited hydrogenated amorphous silicon', Physica Status Solidi: Rapid Research Letters, vol. 8, no. 3, pp. 231-234.
- Bullock, J, Yan, D, Wan, Y et al 2014, 'Amorphous silicon passivated contacts for diffused junction silicon solar cells', Journal of Applied Physics, vol. 115, no. 16.
- Franklin, E, Fong, K, McIntosh, K et al. 2016, 'Design, fabrication and characterisation of a 24.4% efficient interdigitated back contact solar cell', Progress in Photovoltaics: Research and Applications, vol. 24, no. 4, pp. 411-427.
- Wan, Y & McIntosh, K 2013, 'On the surface passivation of textured C-Si by PECVD silicon nitride', IEEE Journal of Photovoltaics, vol. 3, no. 4, pp. 1229-1235.
- Wan, Y, McIntosh, K, Thomson, A et al 2013, 'Low surface recombination velocity by low-absorption silicon nitride on c-Si', IEEE Journal of Photovoltaics, vol. 3, no. 1, pp. 554-559.
- Wan, Y, McIntosh, K & Thomson, A 2013, 'Characterisation and optimisation of PECVD SiNx as an antireflection coating and passivation layer for silicon solar cells', AIP Advances, vol. 3, no. 3, pp. 1-14.
- Barugkin, C, Wan, Y, MacDonald, D et al 2013, 'Evaluating plasmonic light trapping with photoluminescence', IEEE Journal of Photovoltaics, vol. 3, no. 4, pp. 1292-1297.
- Sio, H, Phang, S, Wan, Y et al. 2013, 'The influence of crystal orientation on surface passivation in multi-crystalline silicon', 39th IEEE Photovoltaic Specialists Conference, PVSC 2013, IEEE, Tampa, FL, pp. 1770-1775.
- Blakers, A, Fong, K, Franklin, E et al. 2013, '24.6% efficient back contact cell with oxide - nitride passivation', 23rd International Photovoltaic Science and Engineering Conference, Conference Organising Committee, Taipei, Taiwan.
- Wan, Y, McIntosh, K & Thomson, A 2012, 'Characterization of stress in amorphous silicon nitride and implications to c-Si surface passivation', IEEE Photovoltaic Specialists Conference (PVSC 2012), Curran Associates, Inc., Austin, TX, USA, pp. 1139-1143.
- McIntosh, K, Black, L, Baker-Finch, S et al. 2012, 'Determination of the magnitude and centroid of the charge in a thin-film insulator by CV and Kelvin probe measurements', Energy Procedia, vol. 15, pp. 162-170.
- Baker-Finch, S, McIntosh, K, Terry, M et al 2012, 'Isotextured silicon solar cell analysis and modeling 2: Recombination and device modeling', IEEE Journal of Photovoltaics, vol. 2, no. 4, pp. 465-472.
Projects and Grants
Grants information is drawn from ARIES. To add or update Projects or Grants information please contact your College Research Office.
- ANU Solar Hydrogen Generation R&D Project (Secondary Investigator)
- Advanced Silicon Solar Cells by DESIJN: a novel technology based on deposited silicon junctions (Secondary Investigator)
- Dopant-Free Silicon Solar Cells: Rational Design of Transition Metal Oxide Heterocontacts (Primary Investigator)
- Advanced high-efficiency silicon solar cells employing innovative atomic scale engineered surface and contact passivation layers (Secondary Investigator)
- Advanced Surface and Contact Technologies for Industrial Silicon Photovoltaics (Secondary Investigator)
