id	keyword
american_scientific_journal-7407	solar
american_scientific_journal-7407	cells
american_scientific_journal-7407	technology
american_scientific_journal-7407	energy
american_scientific_journal-7407	research
american_scientific_journal-7407	efficiency
american_scientific_journal-7407	vol
american_scientific_journal-7407	layer
american_scientific_journal-7407	photovoltaic
american_scientific_journal-7407	figure
american_scientific_journal-7407	power
american_scientific_journal-7407	materials
american_scientific_journal-7407	journal
american_scientific_journal-7407	engineering
american_scientific_journal-7407	technologies
american_scientific_journal-7407	sciences