| 초록 |
Colloidal quantum dots (CQDs) are promising materials for next generation solar cells. With surface chemistry modification of CQDs through ligand exchange, better control over band energy alignment and improvement in charge extraction can be achieved. So far, surface passivation strategies for lead chalcogenide CQD solar cell had been well-researched; however, toxicity remains a concern. AgBiS2 CQDs are a promising alternative to create environmentally friendly CQD solar cells high absorption coefficient. So far, utilizing different capping ligands to create better band-energy alignment is a topic that haven’t been explored for AgBiS2 CQDs. Here, we have introduced a thin interlayer of thiol ligand-exchanged AgBiS2 QDs in between halide ligand-exchanged active layer and polymer hole transport layer. This interlayer improved the solar cell figures of merit reaching power conversion efficiency of 5.65%. |
