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Low temperature solution processable TiO2 nano-sol for electron transporting layer of flexible perovskite solar cells
- Authors
- You, Myung Sang; Heo, Jin Hyuck; Park, Jin Kyoung; Moon, Sang Hwa; Park, Bum Jun; Im, Sang Hyuk
- Issue Date
- 1-6월-2019
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- TiO2 nano-sol; Low temperature; Solution process; Electron transporting layer; Perovskite solar cells
- Citation
- SOLAR ENERGY MATERIALS AND SOLAR CELLS, v.194, pp.1 - 6
- Indexed
- SCIE
SCOPUS
- Journal Title
- SOLAR ENERGY MATERIALS AND SOLAR CELLS
- Volume
- 194
- Start Page
- 1
- End Page
- 6
- ISSN
- 0927-0248
- Abstract
- Low-temperature solution processable TiO2 nano-sol for electron transporting layer (ETL) of flexible perovskite solar cells is prepared by synthesizing TiO2 nano-sols by peptization in acidic aqueous solution and re-dispersing the TiO2 nanoparticles in H2O, 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 TiO2 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.
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