Abstract
Monolithic device architectures provide a route to large-area mesoporous solar cell manufacture through scalable solution-processed fabrication. A limiting factor in device scale-up is availability of low-resistivity printable counter electrode materials and reliable doped charge transport materials. We report an efficient all-printable monolithic solid-state dye-sensitized solar cell (ss-DSC) based on a high-conductivity porous carbon counter electrode and a highly doped 2,2′,7,7′-tetrakis(N,N-di-4-methoxyphenylamino)-9,9′-spirobifluorene (spiro-OMeTAD) hole transport material (HTM). A review of current state-of-the-art printable porous counter electrodes in DSC literature was conducted and identified blends of graphite/carbon black as promising composites for high-conductivity electrodes. Direct ex situ oxidation of spiro-OMeTAD produced a stable HTM dopant, and its incorporation with one of the lowest-resistivity graphite/carbon black composite materials reported to date drastically decreases device se...
Published Version
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