Kean Fong
Australian National University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Kean Fong.
photovoltaic specialists conference | 2016
Ngwe Soe Zin; Keith R. McIntosh; Teng Kho; Evan Franklin; Kean Fong; Matthew Stocks; Er-Chien Wang; T. Ratcliff; Andrew Blakers
Interdigitated back-contact (IBC) solar cells developed in the past two years have efficiencies in the range 24.4%-25.6% As high as these efficiencies are, there are opportunities to increase them further by improving on the light trapping. Silicon solar cells incorporating double-sided pyramidal texture are capable of superior light trapping than cells with texture on just the front. One of the principle losses of double-sided pyramidal texture is the light that escapes after a second pass through the cell when the facet angles are the same on the front and rear. This contribution investigates how this loss might be reduced by changing the facet angle of the rear pyramids. A textured pyramid rounding is introduced to improve the light trapping. The reduction in surface recombination that rounding the facets introduces is also evaluated. With confocal microscopy, spectrophotometry and ray tracing, the rounding etch time required to yield the best light trapping is investigated. With photoconductance lifetime measurements, the surface recombination is found to continue to decrease as the rounding time increases. The spectrophotometry and ray tracing suggests that the double sided textured samples featuring rounded rear pyramids have superior light trapping to the sample with a planar rear surface. The high-efficiency potential of rounded textured pyramids in silicon solar cells is demonstrated by the fabrication of 24% efficient back-contact silicon solar cells.
photovoltaic specialists conference | 2014
Ngwe Soe Zin; Andrew Blakers; Evan Franklin; Kean Fong; Teng Kho; Chog Barugkin; Er-Chien Wang
The process of making Interdigitated Back Contact (IBC) solar cell is implemented by a novel simplified etch-back technique, while aiming for no compromise on high-efficiency potentials. Simplified etch-back creates localized heavy and light phosphorus and boron diffusions simultaneously. This process also leaves localised heavy diffusions to be approximately a micron higher than neighbouring light diffusion regions. In comparison to the IBC solar cells that ANU developed to date [1], key advantages of this technique feature reduction in cell process steps; requires only two diffusions to create p, p+, n and n+ diffusions; no high-temperature oxidation masking steps required as diffusion barriers; independent optimization of contact recombination, lateral carriers transport and surface passivation; and potential higher silicon bulk lifetime and reduced contamination due to low thermal budget. Based on the etch-back technique, the total saturation current density deduced from the test structures for the IBC cell is below 30 fA/cm2.
Progress in Photovoltaics | 2016
Evan Franklin; Kean Fong; Keith R. McIntosh; Andreas Fell; Andrew Blakers; Teng Kho; Daniel Walter; Da Wang; Ngwe Soe Zin; Matthew Stocks; Er-Chien Wang; Nicholas E. Grant; Yimao Wan; Y. Yang; Xueling Zhang; Zhiqiang Feng; Pierre J. Verlinden
Energy Procedia | 2013
Andrew Blakers; Ngwe Soe Zin; Keith R. McIntosh; Kean Fong
photovoltaic specialists conference | 2014
Keith R. McIntosh; Teng Kho; Kean Fong; Simeon C. Baker-Finch; Yimao Wan; Ngwe Soe Zin; Evan Franklin; Dingcheng Wang; Malcolm Abbott; Nicholas E. Grant; Er-Chien Wang; Matthew Stocks; Andrew Blakers
world conference on photovoltaic energy conversion | 2013
Andreas Fell; S.Z. Ngwe; Evan Franklin; Andrew Blakers; Keith R. McIntosh; K. Teng; Kean Fong
Solar Energy Materials and Solar Cells | 2015
Daniel Walter; Andreas Fell; Evan Franklin; Da Wang; Kean Fong; Teng Kho; Klaus Weber; Andrew Blakers
Solar Energy Materials and Solar Cells | 2018
Ngwe Soe Zin; Keith R. McIntosh; Sara Bakhshi; Abraham Vázquez-Guardado; Teng Kho; Kean Fong; Matthew Stocks; Evan Franklin; Andrew Blakers
Solar Energy Materials and Solar Cells | 2018
Teng Choon Kho; Kean Fong; Keith R. McIntosh; Evan Franklin; Nicholas E. Grant; Matthew Stocks; Sieu Pheng Phang; Yimao Wan; Er-Chien Wang; Kaushal Vora; Zin Ngwe; Andrew Blakers
Solar Energy Materials and Solar Cells | 2018
Ngwe Soe Zin; Keith R. McIntosh; Sara Bakhshi; Abraham Vázquez-Guardado; Teng Kho; Kean Fong; Matthew Stocks; Evan Franklin; Andrew Blakers