fig1

Figure 1. Selected progress in solution-processed QD photovoltaics. (A) Selected reported-R and certified-C PCEs from the cited primary studies; QSS identifies a quasi-steady-state value. Exact values are shown where reported. The annotations identify scale-up benchmarks for conductive perovskite-QD and stable PbS inks; (B) Principal materials advances associated with each trajectory. Schematics are not to scale; colors denote material platform and surface configuration rather than exact nanocrystal morphology. QD: Quantum dot; CQD: colloidal quantum dot; NC: nanocrystal; PCEs: power-conversion efficiencies; QSS: quasi-steady-state; PbS: lead sulfide.