光敏剂
色素敏化染料
能量转换效率
联苯
太阳能电池
电解质
光化学
材料科学
接受者
电子受体
化学
光电子学
电极
有机化学
物理化学
物理
凝聚态物理
作者
Dan Zhang,Marko Stojanović,Yameng Ren,Yiming Cao,Felix T. Eickemeyer,Etienne Socie,Nick Vlachopoulos,Jacques-E. Moser,Shaik M. Zakeeruddin,Anders Hagfeldt,Michaël Grätzel
标识
DOI:10.1038/s41467-021-21945-3
摘要
Abstract To develop photosensitizers with high open-circuit photovoltage ( V oc ) is a crucial strategy to enhance the power conversion efficiency (PCE) of co-sensitized solar cells. Here, we show a judiciously tailored organic photosensitizer, coded MS5, featuring the bulky donor N -(2’,4’-bis(dodecyloxy)-[1,1’-biphenyl]-4-yl)-2’,4’-bis(dodecyloxy)- N -phenyl-[1,1’-biphenyl]-4-amine and the electron acceptor 4-(benzo[ c ][1,2,5]thiadiazol-4-yl)benzoic acid. Employing MS5 with a copper (II/I) electrolyte enables a dye-sensitized solar cell (DSC) to achieve a strikingly high V oc of 1.24 V, with the V oc deficit as low as 130 mV and an ideality factor of merely 1.08. The co-sensitization of MS5 with the wider spectral-response dye XY1b produces a highly efficient and stable DSC with the PCE of 13.5% under standard AM1.5 G, 100 mW cm −2 solar radiation. Remarkably, the co-sensitized solar cell (active area of 2.8 cm 2 ) presents a record PCE of 34.5% under ambient light, rendering it very attractive as an ambient light harvesting energy source for low power electronics.
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