A dye-sensitized solar cell using pheophytin-carotenoid adduct: Enhancement of photocurrent by electron and singlet-energy transfer and by suppression of singlet-triplet annihilation due to the presence of the carotenoid moiety

作者：Wang, Xiao-Feng^*; Koyama, Yasushi; Wada, Yuji; Sasaki, Shin-ichi; Tamiaki, Hitoshi

来源：Chemical Physics Letters, 2007, 439(1-3): 115-120.

DOI：10.1016/j.cplett.2007.03.064

• PERFORMANCE
• EXCITATION
• CHLORIN
• STATE
• ZINC

Titania-based solar cells were fabricated by the use of a pheophytin derivative and a pheophytin-carotenoid adduct. The addition of the carotenoid moiety increased the photocurrent (J(sc) = 3.7 -> 6.0 mA cm(-2)), reduced the photovoltage (V-oc = 0.53 -> 0.46 V), and enhanced the solar energy-to-electricity conversion efficiency (eta = 1.4 -> 1.8%). The increase in photocurrent was explained in terms of electron and singlet-energy transfer from the carotenoid to the chlorin moiety as well as the prevention of the chlorin aggregate by the bulky carotenoid moiety and the resultant suppression of the singlet-triplet annihilation reaction.

• 出版日期2007-5-4