Applied Physics Letters · 2015 · 28 citations · 20 references
EngineeringMaterials EngineeringMaterials ScienceSemiconductor DevicesSemiconductor MaterialsThin FilmsPhotovoltaic DevicesPhotovoltaic MaterialsSemiconductor SurfacesSemiconductor Thin FilmsSilicon MaterialsSolar CellsAbsorber MaterialsAmorphous SiliconElectron Beam EvaporationEnergy Conversion EfficiencyOpen-circuit VoltagePower ConversionPower Conversion EfficiencyThin-film Absorbers
We fabricated an efficient hybrid solar cell by spin coating poly(3,4-ethylene-dioxythiophene):polystyrenesulfonate (PEDOT:PSS) on planar multicrystalline Si (mc-Si) thin films. The only 5 μm thin Si absorber layers were prepared by diode laser crystallization of amorphous Si deposited by electron beam evaporation on glass. On these absorber layers, we studied the effect of SiOx and Al2O3 terminated Si surfaces. The short circuit density and power conversion efficiency (PCE) of the mc-Si/Al2O3/PEDOT:PSS solar cell increase from 20.6 to 25.4 mA/cm2 and from 7.3% to 10.3%, respectively, as compared to the mc-Si/SiOx/PEDOT:PSS cell. Al2O3 lowers the interface recombination and improves the adhesion of the polymer film on the hydrophobic mc-Si thin film. Open circuit voltages up to 604 mV were reached. This study demonstrates the highest PCE so far of a hybrid solar cell with a planar thin film Si absorber.
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High efficiency planar Si/organic heterojunction hybrid solar cells
Lining He, Changyun Jiang, Hao Wang et al. · Applied Physics Letters · 2012 · 171 citations · Full text