Add time:09/03/2019         Source:sciencedirect.com

Photo-doping is a process to optimize solid-state dye-sensitized solar cells based on 2,2′7,7′-tetrakis-(N,N-di-p-methoxyphenyl-amine)-9,9′-spirobifluorene (spiro-OMeTAD). We investigate the effect of photo-doping on performance for solid-state DSSC based on spiro-OMeTAD and carbon counter electrode. The efficiency is improved to 4.09% by optimizing doping level under standard solar conditions (AM1.5G 100 mW cm−2). Results indicate that photo-doping has significant influence on charge transferring properties at TiO2/spiro-OMeTAD and spiro-OMeTAD/carbon interface, which is consistent with the change of photovoltaic performance.

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