Abstract
Low-temperature solution processable TiO 2 nano-sol for electron transporting layer (ETL) of flexible perovskite solar cells is prepared by synthesizing TiO 2 nano-sols by peptization in acidic aqueous solution and re-dispersing the TiO 2 nanoparticles in H 2 O, ethanol (EtOH), dimethylsulfoxied (DMSO), and N,N-dimethylformamide (DMF). By considering dielectric constant, zeta potential, and surface tension of solvent media, we found that the DMF is the best to form uniform TiO 2 ETL by spin-coating among them because it has low surface tension and high zeta potential. Accordingly, we could demonstrate 18.2% power conversion efficiency (PCE) for rigid glass substrate based perovskite solar cells and 15.8% PCE for flexible polymer substrate based devices by low-temperature solution process.
Original language | English |
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Pages (from-to) | 1-6 |
Number of pages | 6 |
Journal | Solar Energy Materials and Solar Cells |
Volume | 194 |
DOIs | |
Publication status | Published - 2019 Jun 1 |
Keywords
- Electron transporting layer
- Low temperature
- Perovskite solar cells
- Solution process
- TiO nano-sol
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Renewable Energy, Sustainability and the Environment
- Surfaces, Coatings and Films