摘要
以大孔径的介孔炭(MC)为催化层材料经低温热处理构建出炭对电极,着重探讨了在炭浆料中添加Triton X100对其组装的染料敏化太阳电池(DSCs)光电性能的影响,并引入分形维数(DF)用于定量评估炭膜形貌的差异。结果表明,当炭浆料中Triton X100的含量增加到0.1 mL(相应MC含量为0.6 g)时,DSCs的光电转换效率增加至5.65%,其值比活性炭对电极DSCs高46.5%,且达到Pt对电极DSCs的95.4%。Triton X100改性的介孔炭对电极的高性能归功于高品质的炭膜和介孔炭本身合理的孔结构(如大尺寸孔径和大比表面积等)。相对于未添加Triton X100的纯介孔炭对电极,Triton X100改性的介孔炭对电极具有分布更均匀的炭膜和更小的分形维数,是对电极欧姆串阻减小及相应器件效率改善的一个重要因素。
Mesoporous carbon （MC）, prepared by the carbonization of phenol resin using ethylene glycol as a pore forming agent, was used as the catalyst of the counter electrode in dye-sensitized solar cells （DSCs） fabricated by a paste coating method at low temperature, where a non-ionic surfactant, Triton X100, was used as a modifier of the paste. Fractal dimensions （DF） were used to evaluate the morphological difference of the MC films on the substrate with surfactant content. The efficiency of the DSCs using the MC modified by the surfactant reaches a maximum of 5.65% for 0.6g MC with 0.1 mL surfactant. This is 46.5% higher than that of DSCs using activated carbon as a catalyst in the counter electrode, and 95.4% of the value obtained using DSCs with a Pt counter electrode under the same conditions. The performance improvement of the surfactant-modified MC counter electrode is attributed to a uniform MC film with a low DF value induced by adding the surfactant, a large average mesopore size of 34.6 nm that is favorable for mass transport, and a high-surface-area glassy carbon structure that has a high content of active sites.
出处
《新型炭材料》
SCIE
EI
CAS
CSCD
北大核心
2013年第4期254-261,共8页
New Carbon Materials
基金
国家自然科学基金(51162025
51164033)
江西省自然科学基金(2010GQC0178)
西安交通大学金属材料强度国家重点实验室开放研究项目(20111207)~~
关键词
介孔炭
染料敏化太阳电池
对电极
表面活性剂
低温制备
Dye-sensitized solar cells
Counter electrode
Mesoporous carbon
Surfactant
Low temperature
