Interdigitated-back-contacted silicon heterojunction solar cells featuring novel MoO_x-based contact stacks

The fabrication process of interdigitated-back-contacted silicon heterojunction (IBC-SHJ) solar cells has been significantly simplified with the development of the so-called tunnel-IBC architecture. This architecture utilizes a highly conductive (p)-type nanocrystalline silicon (nc-Si:H) layer deposited over the full substrate area comprising...

Numerical simulation of c-Si solar cells based on transition metal oxide as carrier selective contact: Drift diffusion and ab initio

Silicon heterojunction solar cells employing transition metal oxides as carrier selective contact are of particular interest due to the potential of reducing parasitic absorption while featuring optimal electrical properties. Recently, a record efficiency of 23.5% was achieved by employing molybdenum oxide (MoOx) as carrier selective contact....

Strategy to mitigate the dipole interfacial states in (i)a-Si:H/MoOxpassivating contacts solar cells

Electrical simulations show that the dipole formed at (i)a-Si:H/MoOx interface can explain electrical performance degradation. We experimentally manipulate this interface by a plasma treatment (PT) to mitigate the dipole strength without harming the optical response. The optimal PT + MoOx stack results in strongly improved electrical...

Molybdenum Oxide in Hole-selective Contacts for Silicon-based Solar Cells

Although front and back contact silicon heterojunction solar cells exhibit promising external parameters, they are limited by the front highly absorptive doped layers. Due to their opto-electronic properties, research and development groups have demonstrated that transition metal oxides (TMO) are potential alternatives for doped layers in solar...

Novel Doping Free Metal-oxide Carrier Selective Passivating Contacts for Solar Cells

Carrier selective passivating contact (CSC) is considered to be a promising direction for surface passivation research because it performs passivation for both non-contacted and contacted areas. Conventional heavy doping CSCs are subject to a few drawbacks such as significant Auger recombination, parasitic absorption, complicated processing and...

Molybdenum oxide thin films for heterojunction crystalline silicon solar cells

With the fast expanding photovoltaic (PV) industry, we are currently witnessing an unprecedented evolution of high-efficiency PV technologies in laboratories. The topic of this thesis is certainly among the novel technologies that could eventually break through on the market. Ultra-thin molybdenum oxide (MoOx) layer, as a hole-selective contact...