Synthesis Of Photosensitive Dye Based On Triphenylamine In Pilot Scale And Its Performance

As a new type of photovoltaic technology, dye-sensitized solar cells (DSCs) have been considered to be a credible alternative to conventional inorganic silicon-based solar cells, because of their easy fabrication, high efficiency and low cost, since the pioneering report by O’Regan and Gra’tzel in1991. To date, a12.3%efficiency of DSCs has been achieved by employing a combination of a zinc porphyrin dye (YD2-o-C8) and an organic dye (Y123) in conjunction with a tris(2,2-bipyridine)cobalt(Ⅱ/Ⅲ) redox couple, speeding up the large-scale practical application of DSCs.As a key component, the employment of noble metal Ru-complex as sensitizer increases the cost of DSCs. So, the development of efficient, stable and low-cost metal-free sensitizers becomes much more important.In this paper, a novel photosensitizer, in which triphenylamine derivative is employed as donor; carbon-carbon double bone and thiophene ring are employed as π-bridge; cyano acrylic acid is employed as acceptor, was reported for its low cost, high molar absorption coefficient, high efficiency and easy synthesis. Also, we applied this sensitizer in DSCs in pilot scale. Applied in DSCs, an efficiency of7.0%was achieved in our lab. Under the same condition, the reference dye Z907(Ru-complex) exhibits similar efficiency.Through optimization,10g sensitizers can be got once time with an overall yield of27.2%. At the same time, this sensitizer shows good stability when applied to DSCs.