Amorphous/crystalline silicon (a-Si/c-Si) heterojunctions are of particular importance in photovoltaic (PV) energy conversion in a cost-effective way. This is principally due to the low temperature (low-T) nature of the process. In this work, we have analyzed a (n)a-Si/(i)a-Si/(p)cSi heterojunction solar cell structure using theoretical models for internal quantum yield (IQY) and I-V behavior. ...

Bimolecular charge carrier recombination has been clarified in bulk-heterojunction solar cells based on a blend of regioregular poly(3-hexylthiophene) and 1-(3-methoxycarbonyl)propyl-1-phenyl-[6,6]-methanofullerene using the time-of-flight method. We show how bimolecular recombination influences the charge carrier transport, how it limits the efficiency of low-mobility solar cells, and how to e...

Fabrication of a monocrystalline silicon based heterojunction film at room-temperature in a time-efficient manner is desirable for energy and environmental considerations. In this report, a gas-solid phase direct elemental reaction (DER) route to realize this aim by firstly depositing an elemental copper layer on a monocrystalline silicon surface followed by a reaction with iodine vapor is desc...