| 초록 |
Emerging semiconducting materials including colloidal quantum dots (CQDs) and organic polymer have unique photovoltaic properties, and their hybridization can lead to synergistic effects for high performance. For realizing the full potential of CQD/organic hybrid solar cells, adjusting interfacial properties between the CQD and organic matter should be required. Here, the electronic band between the CQD and the polymer layers is carefully modulated by introducing an interfacial layer treated with several types of ligands. The interfacial layer provides a cascading conduction band offset (ΔEC), and reduces local charge accumulation at CQD/polymer interfaces, thereby suppressing bimolecular recombination. Based on these results, a 13.74% of high performance CQD/polymer hybrid solar cell is demonstrated under AM 1.5 solar illumination. The hybrid device retains more than 90% of its initial performance after 402 days under ambient conditions. |
