PEROVSKITE SINGLE-JUNCTION AND SILICON- OR CIGS-BASED TANDEM SOLAR CELLS: HYPE OR HOPE?

摘要

The past two years has seen the rapid emergence of a new solar cell technology based on mixed organic-inorganic lead halide perovskites. Although the first efficient solid-state perovskite cells were reported only in mid-2012, progress was extremely rapid during 2013 with energy conversion efficiency reaching a confirmed 16.2% at year-end. During 2014, this has been increased to 17.9%, with less credible unconfirmed reports of efficiencies up to 19.3%. Moreover, a broad range of different fabrication approaches and device concepts are represented amongst the highest performing devices to date with this diversity suggesting performance is still far from fully optimised. As well as application as thin-film cells in their own right, this flexibility and high radiative efficiency makes perovskites of interest as top cells for both silicon and CIGS tandem cell technology. Challenges to the successful development of each of these technologies are discussed.