Wang Peng, Wenger Bernard, Humphry-Baker Robin, Moser Jacques-E, Teuscher Joël, Kantlehner Willi, Mezger Jochen, Stoyanov Edmont V, Zakeeruddin Shaik M, Grätzel Michael
Laboratory for Photonics and Interfaces, Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland.
J Am Chem Soc. 2005 May 11;127(18):6850-6. doi: 10.1021/ja042232u.
A 7.4% power conversion efficiency at air mass (AM) 1.5 full sunlight was reached with a mesoscopic solar cell employing a new binary ionic liquid electrolyte composed of 1-propyl-3-methylimidazolium iodide and 1-ethyl-3-methylimidazolium tricyanomethanide in conjunction with the amphiphilic ruthenium complex NaRu(4-carboxylic acid-4'-carboxylate)(4,4'-dinonyl-2,2'-bipyridine)(NCS)(2), coded as Z-907Na. Ultramicroelectrode voltammetric, nanosecond laser transient absorbance, and photovoltaic measurements show that a high iodide concentration is required for dye regeneration to compete efficiently with charge recombination. A surprisingly fast reductive quenching process is turned on in pure iodide melts. This channel is unproductive, explaining the lower photocurrents observed under these conditions.
采用由碘化1-丙基-3-甲基咪唑鎓和三氰基甲烷化1-乙基-3-甲基咪唑鎓组成的新型二元离子液体电解质，并结合两亲性钌配合物NaRu(4-羧酸-4'-羧酸盐)(4,4'-二壬基-2,2'-联吡啶)(NCS)(2)（编码为Z-907Na）的介观太阳能电池，在空气质量（AM）1.5全太阳光下实现了7.4%的功率转换效率。超微电极伏安法、纳秒激光瞬态吸光度和光伏测量表明，染料再生需要高碘化物浓度才能与电荷复合有效竞争。在纯碘化物熔体中开启了一个惊人的快速还原猝灭过程。这个通道是无效的，这解释了在这些条件下观察到的较低光电流。
