π-Expanded dibenzo-BODIPY with near-infrared light absorption: Investigation of photosensitizing properties of NiO-based p-type dye-sensitized solar cells
π-Expanded dibenzo-BODIPY with near-infrared light absorption: Investigation of photosensitizing properties of NiO-based p-type dye-sensitized solar cells
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DOI：
10.1016/j.dyepig.2019.107613
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发表时间：
2019-11-01
影响因子：
4.5
通讯作者：
Kubo, Yuji
中科院分区：
文献类型：
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作者：
Higashino, Yuta;Erten-Ela, Sule;Kubo, Yuji
近红外吸收染料作为功能材料有着广泛的需求，因此其合成受到了人们的关注。鉴于适用于p型染料敏化太阳能电池（DSSC）器件的近红外敏化剂极其罕见，合成了含有三苯胺和硝基噻吩单元的p-扩展的二苯并-BODIPY敏化剂1; 1的吸收光谱在730 nm处显示出强吸收带，摩尔消光系数为7.14 x 10（4）M-1 cm（-1）。制备了一种具有1-负载NiO电极的p型DSSC器件，并对其电池性能进行了研究。其显示开路电压（V-OC）、短路电流密度（J（SC））和填充因子（FF）分别为79 mV、0.61 mA cm（-2）和0.25。因此，功率转换效率为0.012%。其性能较低，主要是由于NiO和电极表面的还原染料之间非常快的复合。然而，EQE测量表明，1-加载的p型DSSC器件在高达850 nm的波长处将光子转换为电流，因此值得进一步研究以改善电池性能。
Much attention has been devoted to the synthesis of dyes that absorb near-infrared (NIR) radiation because of numerous demands for them as functional materials. Given that NIR sensitizers applicable to p-type dye-sensitized solar cell (DSSC) devices are extremely rare, p-extended dibenzo-BODIPY sensitizer 1 containing triphenylamine and nitrothiophene units was synthesized; the absorption spectrum of 1 showed an intense absorption band at 730 nm with a molar extinction coefficient of 7.14 x 10 (4) M-1 cm(-1). A p-type DSSC device with a 1-loaded NiO electrode was fabricated and its cell performance was investigated. It showed an open circuit voltage (V-OC), a short circuit current density (J(SC)), and a fill factor (FF) of 79 mV, 0.61 mA cm(-2), and 0.25, respectively. Consequently, the power conversion efficiency was 0.012%. Its performance was low, mainly owing to very fast recombination between the NiO and reduced dye at the surface of the electrode. However, EQE measurement showed that the 1-loaded p-type DSSC devices convert photons into current at wavelengths up to 850 nm, so further investigation to improve the cell performance is deserved.