Inkjet printing emerged as an alternative deposition method to spin coating in the field of perovskite solar cells (PSCs) with the potential of scalable, low-cost, and no-waste manufacturing. In this study, the materials TiO, SrTiO, and SnO were inkjet-printed as electron transport layers (ETLs), and the PSC performance based on these ETLs was optimized by adjusting the ink preparation methods and printing processes. For the mesoporous ETLs inkjet-printed from TiO and SrTiO nanoparticle inks, the selection of solvents for dispersing nanoparticles was found to be important and a cosolvent system is beneficial for the film formation. Meanwhile, to overcome the low current density and severe hysteresis in SrTiO-based devices, mixed mesoporous SrTiO/TiO ETLs were also investigated. In addition, inkjet-printed SnO thin films were fabricated by using a cosolvent system and the effect of the SnO ink concentrations on the device performance was investigated. In comparison with PSCs based on TiO and SrTiO ETLs, the SnO-based devices offer an optimal power conversion efficiency (PCE) of 17.37% in combination with a low hysteresis. This work expands the range of suitable ETL materials for inkjet-printed PSCs and promotes the commercial applications of inkjet printing techniques in PSC manufacturing.
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| http://dx.doi.org/10.3390/ma14247525 | DOI Listing |
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