摘要
分别以气煤、焦煤、瘦煤为原料制备了低成本、高性能煤基炭对电极(counter electrodes,CEs),并使用煤基炭CE同时代替导电玻璃基底和催化层,分别考察了浸渍和表面修饰对煤基炭CE结构和光电性能的影响。采用X射线衍射、扫描电镜和电化学阻抗谱等表征手段,对煤基炭CE的结构和性能进行了表征。结果表明:浸渍后煤基炭CE形成了底层致密表层多孔的一体化结构;经过表面修饰的煤基炭CE表现出良好的光电性能,其开路电压(Voc)、短路电流密度(Jsc)和填充因子(FF)分别为0.79 V、13.48 mA/cm2和0.67,光电转化效率(η)达到了7.16%,与传统Pt电极的效率相当,比石墨电极效率提高30%。煤基炭CE是传统Pt/FTO电极的良好替代材料。
The coal-based carbon counter electrodes （CEs） with low-cost and high-performance were prepared from different coal powders such as gas coal, coking coal and lean coal, and they were used to substitute both conductive glass substrate and catalyst layer. The effects of impregnation and surface modification of the coal-based carbon CEs on their structure and photovoltaic performance were investigated. XRD, SEM and electrochemical impedance spectroscope were used to character the structure and performance of coal based carbon CEs. Results show that the coal based carbon CE after impregnated is the integrative CE with porous top surface and dense bottom. The solar cell with coal based carbon CE with surface modified demonstrates high photovoltaic performance with open circuit photooltage （Voc） of 0.79 V, short circuit photocurrent density （Jsc） of 13.48 mA/cm2, fill factor （FF） of 0.67, and solar-to-electricity conversion efficiency （η） of 7.16%, which is 30% higher than that of the cell with graphite electrode, and comparable to that of the cell with Pt electrode. The results indicate that the as-prepared coal based carbon CE is a promising CE candidate for substitute conventional Pt/FTO counter electrode.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2013年第3期273-277,共5页
Journal of Inorganic Materials
关键词
煤基炭
对电极
一体化
染料敏化太阳能电池
coal based carbon： counter electrode： integration： dve sensitized solar cell
