High Molar Extinction Coefficient Organic Sensitizers for Efficient Dye-Sensitized Solar Cells

被引:138
作者
Choi, Hyunbong [1 ]
Raabe, Ines [2 ]
Kim, Duckhyun [1 ]
Teocoli, Francesca [2 ]
Kim, Chulwoo [1 ]
Song, Kihyung [3 ]
Yum, Jun-Ho [2 ]
Ko, Jaejung [1 ]
Nazeeruddin, Md. K. [2 ]
Graetzel, Michael [2 ]
机构
[1] Korea Univ, Dept New Mat Chem, Jochiwon 339700, Chungnam, South Korea
[2] Ecole Polytech Fed Lausanne, Fac Sci Base, LPI, Inst Sci & Ingn Chim, CH-1015 Lausanne, Switzerland
[3] Korea Natl Univ Educ, Dept Chem, Cheongwon 363791, Chungbuk, South Korea
关键词
dyes/pigments; sensitizers; solar cells; solid-state electrolytes; thienothiopenes; CONVERSION-EFFICIENCY; PHOTOVOLTAIC PERFORMANCE; ABSORPTIVITY; LIQUID; LIGHT; FILM;
D O I
10.1002/chem.200902197
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
We have designed and synthesized highly efficient organic sensitizers with a planar thienothiophene-vinylene-thienothiophene linker. Under standard global AM 1.5 solar conditions, the JK-113-sensitized cell gave a short circuit photocurrent density (J(sc)) of 17.61 mAcm(-2), an open-circuit voltage (V-oc) of 0.71 V, and a fill factor (FF) of 72%, corresponding to an overall conversion efficiency (eta) of 9.1%. The incident monochromatic photo-to-current conversion efficiency (IPCE) of JK-113 exceeds 80% over the spectral region from 400 to 640 nm, reaching its maximum of 93% at 475 nm. The band tails off toward 770 nm, contributing to the broad spectral light harvesting. Solar-cell devices based oil the sensitizer JK-113 in conjunction with a volatile electrolyte and a solvent-free ionic liquid electrolyte gave high conversion efficiencies of 9.1% and 7.9%, respectively. The JK-113-based solar cell fabricated using a solvent-free ionic liquid electrolyte showed excellent stability under light soaking at 60 degrees C for 1000 h.
引用
收藏
页码:1193 / 1201
页数:9
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