Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
A new zinc-porphyrin dye coded FYH-2 with a push-pull framework have been synthesized and used in dye-sensitized solar cells (DSSC). Their spectral, electrochemical properties are investigated. In this report, we demonstrate the significance of device engineering to achieve a power conversion efficiency (PCE) greater than 10% under standard testing condition. In particular, control of dye aggregation and optimization of electrolyte concentration including lithium iodide (LiI) and tert butylpyridine (TBP) have been studied and the PCE is rationally improved from 2.6% to 10.1% with short circuit current (JSC)=20.8 mA/cm2, open circuit voltage (VOC)=0.67V and fill factor (FF)=0.72 under AM 1.5 simulated sunlight irradiation. Owing to its simple synthesizing route and high efficiency, we expect FYH-2 as a promising candidate for practical application of green photovoltaics.
Acknowledgement
We would like to thank the Ministry of Science and Technology of Taiwan (Project No. 102-2221-E-007-121) and Academia Sinica of Taiwan (Project No. AS-102-SS-A11) for their financial support.
Molecular structure of FYH-2 and optimal IV curve of FYH-2 sensitized solar cell
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