| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 봄 (04/10 ~ 04/12, 부산컨벤션센터(BEXCO)) |
| 권호 |
44권 1호 |
| 발표분야 |
대학원생 구두발표 (발표15분) |
| 제목 |
Improved Photovoltaic Performance of CsPbI3 Perovskite Colloidal Quantum Dots via Surface Ligand Management |
| 초록 |
We demonstrate CsPbI3 perovskite colloidal quantum dot (CQD) solar cells with improved photovoltaic performance via developing the surface ligand management. CsPbI3 CQDs are composed of long-hydrocarbon and insulating surface ligands, leading to poor charge transport in solar cells. In a previous report, the surface ligands of CsPbI3 CQDs are replaced with short-chain acetate ions resulting from only hydrolysis of methyl acetate under controlled humidity. We employ acetate-based ionic salts dissolved in methyl acetate in order for more efficient ligand exchange of CsPbI3 CQDs, leading to enhanced electro-coupling and solar cell performance. Among the acetate-based ionic salts, sodium acetate showed the most efficient removal of original surface ligands without the fusion of CsPbI3 CQDs. The CsPbI3 CQD solar cells based on the sodium acetate-based ligand exchange showed the improved power conversion efficiency up to 12.4%, compared to the previously-reported device (10.7%). |
| 저자 |
김지건1, 고민재1, 김영훈2
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| 소속 |
1한양대, 2대구경북과학기술원 태양에너지융합연구센터 |
| 키워드 |
CsPbI3 Perovskite; colloidal quantum dots; solar cells
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| E-Mail |
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