Publications
Please see my full list of publications.
![Laser contacts from POx/Al2O3 passivation stacks](/assets/components/phpthumbof/cache/Laser_Doping_POxAlOx.af8f118b7cd959062e2497bea2c62c3f.png)
Laser contacts from POx/Al2O3 passivation stacks
Aug 20, 2020
|• n+ laser doping demonstrated from POx/Al2O3 passivation stacks on silicon. • Metallised J0 of 540 fA cm−2 for n+ laser-doped region with Rsheet of 39.5 Ω/□. • Consistent with values for POCl3 furnace diffusions, indicating minimal defects. • Same POx/Al2O3 stack provides J0 of 2.5 fA cm−2 on undiffused planar surfaces. • 23.6% simulated efficiency for laser-doped n-type PERL cell based on POx/Al2O3.
![Impact of Al Doping on Surface Passivation of TiOx](/assets/components/phpthumbof/cache/Impact_of_AlDoping_Titania_2020.9e75d57c5bc42f6f9b22877bd7ea4058.jpg)
Impact of Al Doping on Surface Passivation of TiOx
Apr 13, 2020
|In this work, we find that the crystallization of ALD TiOx is very sensitive to the film’s thickness, where a small increase in TiOx thickness can trigger a phase change from amorphous TiOx into anatase, which causes a significant increase in J0s. More importantly, we demonstrate that the incorporation of Al ions into the TiOx films inhibits crystallization, which in turn retains excellent passivation for thicker TiOx.
![Phosphorus diffused LPCVD polysilicon passivated contacts](/assets/components/phpthumbof/cache/PolySilicon_1.9e75d57c5bc42f6f9b22877bd7ea4058.jpg)
Phosphorus diffused LPCVD polysilicon passivated contacts
Jul 06, 2018
|We present a passivated contact technology based on polysilicon deposited using low pressure chemical vapour deposition (LPCVD) over an ultra-thin silicon dioxide layer, which achieves an excellent surface passivation with implied open-circuit voltage of 735 mV, a recombination prefactor below 1 fA cm−2 and contact resistivity below 1 mΩcm2.
![7th World Conference on Photovoltaic Energy Conversion](/assets/components/phpthumbof/cache/WCPEC7_LaserDoping.9e75d57c5bc42f6f9b22877bd7ea4058.jpg)
7th World Conference on Photovoltaic Energy Conversion
Jun 11, 2018
|Overview of my contributions and access to presentations and papers.