PolyU research overcomes major obstacle to solar technology development, achieving record 33.89% power-conversion efficiency in solar cells (IMAGE)

The Hong Kong Polytechnic University

PolyU research overcomes major obstacle to solar technology development, achieving record 33.89% power-conversion efficiency in solar cells

Caption

a, PL imaging spectra for the bare perovskite (PVSK), PVSK/EDAI, PVSK/LiF/EDAI, PVSK/C60, PVSK/LiF/C60 and PVSK/LiF/EDAI/C60. The substrate size is around 20 mm × 20 mm, and C60 deposition was defined by a mask of 15 mm × 15 mm. Scale bar, 10 mm. b, PLQY data of the perovskite films without C60 layer, after C60 layer deposition and after complete top C60/SnO2/IZO contact depositions. c, TRPL spectra of the perovskite films coated with different passivation layers, followed by complete top contacts of C60/SnO2/IZO. d, Typical measured J–V curves (solid line) and pseudo-J–V curves (hollow circle) from the suns–Voc measurements for semitransparent single-junction perovskite devices with an aperture area of 1.0 cm2 and with different passivation layers. e, Power loss analysis for different passivation layer stacks.

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