Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2013-05-15

Journal: Journal of the American Chemical Society

Included Journals: Scopus、EI

Volume: 135

Issue: 19

Page Number: 7378-7385

ISSN: 00027863

Abstract: Efficient solid state dye-sensitized solar cells (sDSCs) were obtained using a small hole transport material, MeO-TPD (N,N,N',N'- tetrakis(4-methoxyphenyl)benzidine), after an initial light soaking treatment. It was discovered that the light soaking treatment for the MeO-TPD based solar cells is essential in order to achieve the high efficiency (4.9%), which outperforms spiro-OMeTAD based sDSCs using the same dye and device preparation parameters. A mechanism based on Li+ ion migration is suggested to explain the light soaking effect. It was observed that the electron lifetime for the MeO-TPD based sDSC strongly increases after the light soaking treatment, which explains the higher efficiency. After the initial light soaking treatment the device efficiency remains considerably stable with only 0.2% decrease after around 1 month (unsealed cells stored in dark). ? 2013 American Chemical Society.