The 2,2,6,6‐Tetramethyl‐1‐piperidinyloxy Radical: An Efficient, Iodine‐ Free Redox Mediator for Dye‐Sensitized Solar Cells
The 2,2,6,6‐Tetramethyl‐1‐piperidinyloxy Radical: An Efficient, Iodine‐ Free Redox Mediator for Dye‐Sensitized Solar Cells
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DOI：
10.1002/adfm.200701041
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发表时间：
2008-01
影响因子：
19
通讯作者：
Zhipan Zhang;Peter Chen;T. Murakami;S. Zakeeruddin;M. Grätzel
中科院分区：
文献类型：
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作者：
Zhipan Zhang;Peter Chen;T. Murakami;S. Zakeeruddin;M. Grätzel
一种基于稳定的有机自由基2，2，6，6-四甲基-1-哌啶氧基(TEMPO)的氧化还原体系被用于染料敏化太阳能电池。采用不同厚度的纳米二氧化钛薄膜对这种新型氧化还原电偶的光伏性能进行了评价。选择由介观二氧化钛颗粒制成的5μm光阳极和具有高摩尔消光系数的有机敏化剂，在10 0 mW cm-2的AM 1.5光照射下，总的太阳能-电力转换效率为5.4%，这在无碘介质体系中是前所未有的。
A promising redox system, offering an alternative to the widely used iodide/triiodide couple, based on the stable organic radical 2,2,6,6‐tetramethyl‐1‐piperidinyloxy (TEMPO) has been employed in dye‐sensitized solar cells. The photovoltaic performance of this new redox couple has been evaluated by employing nanocrystalline TiO2 films with different thickness. Judicious selections of a 5.0 μm photoanode made from TiO2 mesoscopic particles and an organic sensitizer with a high molar extinction coefficient yield an overall solar‐to‐electric power conversion efficiency of 5.4 % under AM 1.5 illumination at 100 mW cm–2, which is unprecedented for an iodine‐free mediator system.