论文信息 - Thin film encapsulation for flexible organic solar cells

Thin film encapsulation for flexible organic solar cells

We report a damage-free thin-film encapsulation (TFE) for flexible small molecule based photovoltaic devices. The damage to organic PV layers arises during the sputtering deposition of Al2O3 and ultraviolet (UV) curing of monomers. To minimize such damage, we insert a buffer layer after evaporating an aluminum cathode. With this scheme, we have fabricated the flexible PV device that consists of ITO(150nm)/CuPc(10nm)/ CuPc:DCM(10nm, 50wt%)/C60:DCM(10nm,50wt%)/ C60(30nm)/Bphen(5nm)/ Al(150nm). To make a comparative analysis, we have fabricated a glass-encapsulated one. It is found that there is no significant discrepancy in the conversion efficiency between them. To demonstrate the barrier property of the TFE, the conversion efficiency as a function of time is observed. It shows that the barrier property of the TFE is comparable with that of the glass encapsulation.

Jongho Lee | Jongwoon Park | Hyogyun Ham | Taewon Kim

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