Solution processing of inorganic electronic devices enables faster and cheaper deposition methods such as roll to roll large scale spin coating, spray casting and ink-jet printing. Recent advances in solution processed solar cells have been separately shown with stable CdTe-based and low stability, high efficiency Lead Halide-based inks. In this study, we have synthesized inks and constructed fully solution processed solar cell devices with structures of Glass/ITO/CdSe/CdTe/Au and Glass/ITO/ZnO/MAPbI3/Au. For comparison, semitransparent devices were fabricated by replacing the gold layer with hexanethiol stabilized silver nanowires with structures of Glass/ITO/CdSe/CdTe/AgNWs and Glass/ITO/ZnO/MAPbI3/AgNWs. Transmittance was recorded with UV/Vis spectroscopy to quantify the percent transmittance of the completed devices and each individual component layer. Band gaps of materials were estimated from absorption onset of the synthesized nanocrystal inks and processed device layers. The morphology of the ink colloids, the surface topography and thickness of each component film were characterized by atomic force microscopy. Device performance was evaluated under 1 sun simulated illumination and I/V curves were used to determine the open circuit voltage, short circuit current, % fill factor and device efficiency. Device parameters were monitored over two weeks at ambient conditions to evaluate trade-off between stability and efficiency for each device structure.

Fully solution processed semitransparent inorganic nanocrystal solar cells

255th National Meeting (2018)

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