Solar-Tectic, a thin-film specialist with patented technology primary focused on developing highly textured, single crystal semiconductor films on glass or other inexpensive substrates, presented a paper at the "Fifth International Symposium on Energy Challenges and Mechanics (ECM5) - working on small scales" in Inverness, Scotland, making public for the first time details of its perovskite/crystalline silicon thin-film tandem solar cell technology for highly efficient and inexpensive solar cells.

While reports of perovskite/silicon tandem solar cells are common, it would seem that there have been much less mentions of perovskite/thin-film silicon. Crystalline thin-film silicon promises to be less expensive than silicon wafer technology due to low temperature processing and less material use. Also, the entire process is non-toxic since tin (Sn) is used in the perovskite material, rather than lead (Pb).