Proceedings of 6th International Conference on Hybrid and Organic Photovoltaics (HOPV14)
Publication date: 1st March 2014
DSSC fabricated on plastic substrate enables the possibility of roll-to-roll, large scale production of light-weight photovoltaic. To fabricate a DSSC on plastic substrate like ITO-PET or ITO-PEN, it is apparent the temperature involved during whole process has to be as low as 150oC because of the limitation of plastic substrate. For counter electrode using platinum catalyst, reducing platinum precursor by heat is obvious unfeasible as the temperature required is usually over 350oC. Meanwhile, the chief technical goal of DSSC is to manufacture it at low cost and maintains efficient and durable performance. Vacuum deposition is known to energy-consumptive with low-throughput and is difficult to apply for large scale production.
We previously developed a process to deposit polymer-protected platinum nanocluster (nano-Pt) on rigid substrate for highly efficient and durable DSSC [1-3]. It was also found the cationic surfactant lies between nano-Pt and substrate creates unwanted resistance and should be removed before assembling device. In this study, we find ozone exposure under room temperature can efficiently remove the notorious surfactant so that the vulnerable plastic substrate can be survived while keeping all other advantages of nanoPt system.
DSSC over 8% efficiency employed with this ozone-treated nanoPt plastic counter electrode is demonstrated and most importantly, this cost-effective, mass production-feasible plastic counter electrode also exhibits very durable performance in thermal aging (60OC) test for 1000 hours in the device without the help of additional gas or moisture barrier film.
1. T.C. Wei, Y.Y. Wang & C.C. Wan, Poly-vinyl-2-pyrrolidone-capped platinum nanoclusters on indium-tin oxide glass as counterelectrode for dye-sensitized solar cells, Appl. Phys. Lett.2006, 88, 103122. 2. Tzu-Chien Wei, Chi-Chao Wan, Yung-Yun Wang, Chih-ming Chen and Han-sheng Shiu,Immobilization of Poly(N-vinyl-2-pyrrolidone)-Capped Platinum Nanoclusters on Indium-Tin Oxide Glass and Its Application in Dye-Sensitized Solar Cells, J. Phys. Chem. C,2007, 111, 4847. 3. Jo-Lin Lan, Chi-Chao Wan, Tzu-Chien Wei, Wen-Chi Hsu, Ya-Huei Chang,Durability test of PVP-capped Pt nanoclusters counter electrode for highly efficiency dye-sensitized solar cell, Prog. Photovolt: Res. Appl. 2012,20 44-50.
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