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(a) Short-circuit current density Jsc versus open-circuit voltage Voc for a range of lead-halide perovskite solar cells with high efficiencies (symbols) as well as the maximum values for Jsc and Voc given by the Shockley–Queisser model (solid line) [56]. (b) Now the values for Jsc and Voc are presented relative to the values in the Shockley–Queisser model, which helps identifying the potential for improvement for the different devices. (Online version in colour.)
