Low temperature solution processable TiO2 nano-sol for electron transporting layer of flexible perovskite solar cells

You, Myung Sang; Heo, Jin Hyuck; Park, Jin Kyoung; Moon, Sang Hwa; Park, Bum Jun; Im, Sang Hyuk

doi:10.1016/j.solmat.2019.02.003

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Low temperature solution processable TiO2 nano-sol for electron transporting layer of flexible perovskite solar cells

You, Myung Sang;
Heo, Jin Hyuck;
Park, Jin Kyoung;
Moon, Sang Hwa;
Park, Bum Jun;
... Im, Sang Hyuk

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38

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40

초록

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.

키워드

TiO2 nano-sol; Low temperature; Solution process; Electron transporting layer; Perovskite solar cells; HIGHLY EFFICIENT; LENGTHS

제목: Low temperature solution processable TiO2 nano-sol for electron transporting layer of flexible perovskite solar cells

저자: You, Myung Sang; Heo, Jin Hyuck; Park, Jin Kyoung; Moon, Sang Hwa; Park, Bum Jun; Im, Sang Hyuk

DOI: 10.1016/j.solmat.2019.02.003

발행일: 2019-06-01

유형: Article

저널명: Solar Energy Materials and Solar Cells

권: 194

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