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Viscosity Blending Approach for 22.42% Efficient Perovskite Solar Cells
- Authors
- Shin, G.S.[Shin, G.S.]; Kim, J.-H.[Kim, J.-H.]; Lee, S.-U.[Lee, S.-U.]; Park, N.-G.[Park, N.-G.]
- Issue Date
- Aug-2021
- Publisher
- John Wiley and Sons Inc
- Keywords
- 2-Methoxyethanol; Dimethylacetamide; Dimethylformamide; Perovskite solar cell; Viscosity blending
- Citation
- Bulletin of the Korean Chemical Society, v.42, no.8, pp.1112 - 1120
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- Bulletin of the Korean Chemical Society
- Volume
- 42
- Number
- 8
- Start Page
- 1112
- End Page
- 1120
- ISSN
- 0253-2964
- Abstract
- We report here the viscosity blending approach toward high efficiency perovskite solar cells. A binary solvent is introduced in the precursor solution, where 2-methoxyethaol (2ME) is mixed with dimethylformamide (DMF) or dimethylacetamide (DMAc). Viscosity of the binary solvent system is estimated by calculating the viscosity blending number. For the ratio of DMF (DMAc): 2ME = 75:25 leading to the viscosity of 1.0317 (1.1699) cSt, a forward-scanned power conversion efficiency (PCE) of 22.42% is achieved along with photocurrent density of 25.46 mA/cm2, voltage of 1.122 V and fill factor of 0.785, which is higher than the PCE of 20.59% for the single DMF solvent. The binary solvent with optimal viscosity is found to be beneficial to reducing trap density and improving carrier lifetime even in thicker perovskite film. © 2021 Korean Chemical Society, Seoul & Wiley-VCH GmbH
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Related Researcher
- PARK, NAM GYU
- Engineering (Chemical Engineering)