Details

Autor(en) / Beteiligte

• Lee, Kwanghee
• Heeger, Alan J
• Park, Sung Heum
• Roy, Anshuman
• Beaupré, Serge
• Cho, Shinuk
• Coates, Nelson
• Moon, Ji Sun
• Moses, Daniel
• Leclerc, Mario

Titel

Bulk heterojunction solar cells with internal quantum efficiency approaching 100

Ist Teil von

• Nature photonics, 2009-05, Vol.3 (5), p.297-302

Ort / Verlag

London: Nature Publishing Group

Erscheinungsjahr

2009

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We report the fabrication and measurement of solar cells with 6% power conversion efficiency using the alternating co-polymer, poly[N-9[variant prime][variant prime]-hepta-decanyl-2,7-carbazole-alt-5,5-(4[variant prime],7[variant prime]-di-2-thienyl-2[variant prime],1[variant prime],3[variant prime]-benzothiadiazole) (PCDTBT) in bulk heterojunction composites with the fullerene derivative [6,6]-phenyl C70 -butyric acid methyl ester (PC70 BM). The PCDTBT/PC70 BM solar cells exhibit the best performance of any bulk heterojunction system studied to date, with JSC = 10.6 mA cm-2 , VOC = 0.88 V, FF = 0.66 and ηe = 6.1% under air mass 1.5 global (AM 1.5 G) irradiation of 100 mW cm-2 . The internal quantum efficiency is close to 100%, implying that essentially every absorbed photon results in a separated pair of charge carriers and that all photogenerated carriers are collected at the electrodes.