11% efficiency solid-state dye-sensitized solar cells with copper(II/I) hole transport materials.
11% efficiency solid-state dye-sensitized solar cells with copper(II/I) hole transport materials.
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DOI：
10.1038/ncomms15390
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发表时间：
2017-06-09
影响因子：
16.6
通讯作者：
Grätzel M
中科院分区：
文献类型：
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作者：
Cao Y;Saygili Y;Ummadisingu A;Teuscher J;Luo J;Pellet N;Giordano F;Zakeeruddin SM;Moser JE;Freitag M;Hagfeldt A;Grätzel M
固态染料敏感的太阳能电池目前遭受诸如纳米孔填充不足的问题，低电导率和孔 - 传输材料的结晶材料在介质TiO2脚手架中浸润，从而导致稳定的11％稳定稳定固态。染料敏感的太阳能电池理解标准空气质量1.5全局使用由[Cu的混合物组成的孔传输材料（4,4'，6,6'-四甲基-2,2'-二吡啶）2]（bis（三氟甲基磺酰基）酰亚胺）2和[cu（4,4'，6,6'-二甲基-2,2,2' - 二吡啶）2]（三氟甲基磺酰基）imide），无定形的Cu（II/I）导体，通过在6.5μm-thick tio 2中快速渗入孔，对于使用这种高效率至关重要。解决激光光解，我们确定从光激发传感器Y123向TIO2注入电子的时间常数，并通过Cu（i）为25 ps和3.2μs的Y123的再生。在过渡金属复合物上作为孔导体。
孔转运蛋白材料的孔渗透不足和低电导率限制了固态染料敏感的太阳能电池的性能达到创纪录的光转换效率为11％。
Solid-state dye-sensitized solar cells currently suffer from issues such as inadequate nanopore filling, low conductivity and crystallization of hole-transport materials infiltrated in the mesoscopic TiO2 scaffolds, leading to low performances. Here we report a record 11% stable solid-state dye-sensitized solar cell under standard air mass 1.5 global using a hole-transport material composed of a blend of [Cu (4,4′,6,6′-tetramethyl-2,2′-bipyridine)2](bis(trifluoromethylsulfonyl)imide)2 and [Cu (4,4′,6,6′-tetramethyl-2,2′-bipyridine)2](bis(trifluoromethylsulfonyl)imide). The amorphous Cu(II/I) conductors that conduct holes by rapid hopping infiltrated in a 6.5 μm-thick mesoscopic TiO2 scaffold are crucial for achieving such high efficiency. Using time-resolved laser photolysis, we determine the time constants for electron injection from the photoexcited sensitizers Y123 into the TiO2 and regeneration of the Y123 by Cu(I) to be 25 ps and 3.2 μs, respectively. Our work will foster the development of low-cost solid-state photovoltaic based on transition metal complexes as hole conductors. Inadequate pore infiltration and low conductivity of hole transporter materials limit the performance of solid-state dye-sensitized solar cells. Using fast charge-exchange Cu(II/I) complexes as part of the hole transporting material, Cao et al. overcome these issues to achieve a record photoconversion efficiency of 11%.