Benzodithiophene derivative 2D spacer as a defect passivation material in metal-halide perovskite solar cells
발표자
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초록
내용
Passivation of defects is an effectual tactic to improve the perovskite solar cells (PSCs) performance. In this study, we introduced benzodithiophene-based 2D spacer with short alkyl chain(BDT-C2) to perovskite film for defect passivation. The introduction of BDT-C2 didn’t exhibit the 2D perovskite structure but optimized amount (0.01 wt%) induced vertically orientated (110) plane of perovskite films. However, when the excess BDT-C2 added into the perovskite films, the orientation rather to be collapsed. This tendency of nano crystal structure leaded to similar tendency in device performance, the device with 0.01wt% amount of BDT-C2 had higher efficiency (18.96%) than pristine device (17.98%). We could estimate by the light intensity tendency that referred decline of charge recombination that the passivation of defects and arrangement of (110) plane direction orientation enhanced the photo-electronical properties.