Effects of a TiO2:CaO barrier layer on the back electron transfer in TiO2- based solar cells

다국어 초록 (Multilingual Abstract)

A TiO2:CaO mixed overlayer was formed on TiO2 photoelectrodes, and the resulting photoelectrodes wereapplied to dye-sensitized solar cells (DSSCs). DSSC with the mixed overlayer showed an increase in shortcircuitcurrent (Jsc), open-circuit voltage (Voc), andfill factor (FF), resulting in a 17% enhancement inphotovoltaic performance, compared to that of reference cell. It was found that, by incorporating themixed overlayer, light harvesting and electron collection efficiency were enhanced, thereby increasing Jsc.
The enhancement in Voc resulted from a reduced back electron transfer, and the increased FF wasattributed to a decreased series resistance and an increased shunt resistance.

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