[1] Univ Oregon, Chem & Biochem, Eugene, OR 97403 USA
[2] Univ Oregon, Inst Sci Mat, Eugene, OR 97403 USA
[3] CNR ISTM, Perugia, Italy
[4] Computat Lab Hybrid Organ Photovolta, Perugia, Italy
[5] Hanyang Univ, Dept Energy Engn, Seoul, South Korea
[6] Univ Notre Dame, Notre Dame, IN 46556 USA