Initial Light Soaking Treatment Enables Hole Transport Material to Outperform Spiro-OMeTAD in Solid-State Dye-Sensitized Solar Cells
2013; American Chemical Society; Volume: 135; Issue: 19 Linguagem: Inglês
10.1021/ja403344s
ISSN1943-2984
AutoresLei Yang, Bo Xu, Dongqin Bi, Haining Tian, Gerrit Boschloo, Licheng Sun, Anders Hagfeldt, Erik M. J. Johansson,
Tópico(s)Conducting polymers and applications
ResumoEfficient 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).
Referência(s)