Effects of oxygen in solid-state dye-sensitized solar cells

• The effects of oxygen on a solid-state dye-sensitized solar cell (sDSC) based on the molecular hole transporting material 2,2’,7,7’,-tetrakis(N,N-di-p-methoxyphenyl-amine)-9,9’,-spirofluorene (spiro-OMeTAD) were studied in detail. Using electrical resistivity measurements in conjunction with time-of-flight and UV-VIS absorption techniques it was demonstrated that chemical oxidation of the hole transport material depends on storage conditions, including O2 pressure and time. This oxidation leads to doping and a lower total serial resistance in the device and improved solar cell characteristics. By using a small light modulation set-up together with a pressure controlled vacuum chamber, it was found that the solar cell electron recombination lifetime is dependent on the partial pressure of oxygen, reducing recombination with increasing pressures.

Ämnesord

NATURVETENSKAP  -- Kemi -- Fysikalisk kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Physical Chemistry (hsv//eng)

Nyckelord

Physical Chemistry

Fysikalisk kemi

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