CoSe2纳米材料在染料敏化太阳能电池中应用研究

摘要

In order to further explore the electrocatalytic performance of cobalt selenide counter electrodes (CEs), cobalt diselenide (CoSe2) CEs were constructed by using sodium hydrogen selenide as selenide source, cobalt chloride hexahydrate as cobalt source. So, CoSe2nanomaterials were synthesized by a hydrothermal method at firstly. CoSe2CEs were fabricated by a spray method. Then the electrocatalytic activity of CoSe2CEs was systematically investigated. And the effect of CoSe2CEs on photoelectric performance of dye-sensitized solar cells (DSCs) was also systematically investigated. The results from structure morphology show that CoSe2nanomaterials with pure phase have an amorphous structure composed of numerous nanoparticles. In addition, CoSe2CEs exhibit high electrocatalytic activity by electrochemical performance test. Furthermore, the power conversion efficiency of the DSC with CoSe2CE as high as 5.77% is obtained (short-circuit current density of 13.88×10-3A·cm-2, open-circuit voltage of 0.65 V, fill factor of 0.64), which is similar to that of the DSC with Pt CE (power conversion efficiency of 5.99%, short-circuit current density of 14.62×10-3A·cm-2, open-circuit voltage of 0.64 V, fill factor of 0.64).%为了进一步探索硒化钴对电极的电催化性能,拟以硒氢化钠为硒源、六水合氯化钴为钴源设计构建二硒化钴(CoSe2)对电极.实验上,先采用水热法合成CoSe2纳米材料,其次利用喷涂法制备CoSe2对电极,并探究其电催化性能及对染料敏化太阳能电池光电性能的影响.结构形貌测试结果表明纯相的CoSe2纳米材料是由纳米颗粒构成的一种无定型结构.电化学性能研究结果表明,CoSe2对电极展现出了较强的电催化活性.同时,由CoSe2对电极组装的染料敏化太阳能电池的能量转换效率达到5.77% (短路电流密度为13.88×10-3A·cm-2,开路电压为0.65 V,填充因子为0.64),与铂电极组装的电池器件效率(5.99%,其中短路电流密度为14.62×10-3A/cm2、开路电压为0.64 V、填充因子为0.64)相当.