Efficient and stable solid-state dye-sensitized solar cells based on a high-molar-extinction-coefficient sensitizer.
The high-molar-extinction-coefficient heteroleptic ruthenium dye, cis-Ru (4,4'-bis(5-octylthieno[3,2-b] thiophen-2-yl)-2,2'-bipyridine) (4,4'-dicarboxyl-2,2'-bipyridine) (NCS)(2), exhibits an AM 1.5 solar (100 mW cm(-2))-to-electric power-conversion efficiency of 4.6% in a solid-state dye-sensitized solar cell (SSDSC) with 2,2', 7,7'-tetrakis-(N,N-di-p-methoxyphenylamine)9,9'-spirobifluorene (spiro-MeOTAD) as the organic hole-transporting material. These SSDSC devices exhibit good durability during accelerated tests under visible-light soaking for 1000 h at 60 degrees C. This demonstration elucidates a class of photovoltaic devices with potential for stable and low-cost power generation. The electron recombination dynamics and charge collection that take place at the dye-sensitized heterojunction are studied by means of impedance and transient photovoltage decay techniques.
Wang
Mingkui
M
Laboratory for Photonics and Interfaces, Institute of Chemical Sciences and Engineering, Swiss Federal Institute of Technology, Lausanne, Switzerland.
Moon
Soo-Jin
SJ
Xu
Mingfei
M
Chittibabu
Kethineni
K
Wang
Peng
P
Cevey-Ha
Ngoc-Le
NL
Humphry-Baker
Robin
R
Zakeeruddin
Shaik M
SM
Grätzel
Michael
M
D004396:Coloring Agents / Q000737:chemistry*; D017097:Electric Impedance; D004736:Energy-Generating Resources; D010777:Photochemistry / Q000295:instrumentation*; D017785:Photons; D014025:Titanium / Q000737:chemistry
D004396:Coloring Agents; C009495:titanium dioxide; D014025:Titanium