Review: Heterojunction Tandem Solar Cells on Si-Based Metal Oxides

a-Si/c-Si1-xGex/c-Si Heterojunction Solar Cells

The performance and material quality requirements of thin film a-Si/c-Si1-xGex/Si heterojunction solar cells are investigated by modeling and simulation. The effects of Ge content, Si1-xGex thickness, Si1-xGex lifetime and a-Si/c-Si1-xGex interfacial quality have been studied. The simulations predict that Si1-xGex based thin film solar cells provide a significant increase in solar cell output c...

Novel High-Efficiency Crystalline-Si-Based Compound Heterojunction Solar Cells: HCT (Heterojunction with Compound Thin-layer)

Origin of passivation in hole-selective transition metal oxides for crystalline silicon heterojunction solar cells

Transition metal oxides (TMOs) have recently attracted interest as an alternative to boron/phosphorous doped layers in crystalline silicon heterojunction solar cells. In this work, the interface between n-type c-Si (n-Si) and three thermally evaporated TMOs (MoO3, WO3 and V2O5) was investigated by transmission electron microscopy and secondary ion-mass/x-ray photoelectron spectroscopy. For the ...

Flexible micromorph tandem a-Si/ c-Si solar cells

The deposition of a stack of amorphous a-Si:H and microcrystalline c-Si:H tandem thin film silicon solar cells micromorph requires at least twice the time used for a single junction a-Si:H cell. However, micromorph devices have a higher potential efficiency, thanks to the broader absorption spectrum of c-Si:H material. High efficiencies can only be achieved by mitigating the nanocracks in the c...

Understanding of Passivation Mechanism in Heterojunction c-Si Solar Cells

Intrinsic hydrogenated amorphous silicon (a-Si:H) films can yield in outstanding electronic surface passivation of crystalline silicon (c-Si) wafers as utilized in the HIT (heterojunction with intrinsic thin layer) solar cells. We have studied the correlation between the passivation quality and the interface nature between thin amorphous layers and an underlying c-Si substrate for understanding...