基于SQ2染料与P3HT的固态染料敏化太阳能电池

Solid-state dye-sensitized solar cells based on SQ2 dye and P3HT

将近红外吸收染料SQ2与可见光吸收空穴传输材料P3HT结合起来制备固态染料敏化太阳能电池,并用锂盐对TiO_2/SQ2表面进行处理来调节器件的光伏性能.通过模拟太阳光照射测试和单色光量子转换效率(IPCE)测试来研究器件的光电性能.测试结果表明,经过锂盐处理后,器件的短路电流(JSC)、填充因子(FF)和转换效率都获得提升.IPCE测试显示,经过锂盐处理后器件在P3HT吸收光谱范围内产生的量子效率没有变化,但在SQ2吸收光谱范围内产生的量子效率明显提升.通过分析得出结论是:锂盐处理不能提高P3HT所吸收的光量子转换效率,但可以提升SQ2染料所吸收的光量子转换效率,进而提高了固态染料敏化太阳能电池的光电转换效率.

In this paper, we used near-infrared absorbing dye SQ2 and visible absorbing hole-transporting material P3HT to make solid-state dye-sensitized cells, and treated the TiO2/SQ2 surface to adjust the photovoltaic performance of the device with lithium salt. The photoelectric performance of the devices was studied by simulating the sun test and monochromatic light quantum conversion efficiency （IPCE） test. Results show that af- ter dealing with the lithium salt, the device exhibited increased short circuit current of （Jsc）, fill factor （FF） and conversion efficiency. IPCE of the devices showed that after dealing with lithium salt, the quantum efficiency of devices did not change within the absorption scope of P3HT, while improved significantly within the absorption scope of SQ2. It is concluded that lithium treatment is able to improve the quantum conversion efficiency of photons absorbed by SQ2 instead of P3HT, elevating the efficiency of the solid-state dye sensitized cells.