基于金属敏化剂共敏化中的竞争吸附对染料敏化太阳能电池性能影响的研究
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- 英文论文题名：Stepwise co-sensitization of two large metal-based sensitizers: probing into their competitive adsorption for improving the photovolatic performance of dye-sensitized solar cells
- 论文作者：赵艳明 ; 张宝 ; 冯亚青
- 英文论文作者：Yanming Zhao ; Bao Zhang ; Yaqing Feng ; School of Chemical Engineering and Technology ; Tianjin University
- 年：2016
- 作者机构：天津大学;
- 论文关键词：染料敏化太阳能电池 ; 共敏化 ; 分子尺寸 ; 竞争吸附
- 会议召开时间：2016-07-01
- 会议录名称：中国化学会第30届学术年会摘要集-第二十二分会：有机光伏的机遇和挑战
- 语种：中文
- 分类号：TM914.4
- 学会代码：ZGHY
- 会议名称：中国化学会第30届学术年会-第二十二分会 ; 有机光伏的机遇和挑战
- 会议地点：中国辽宁大连
- 主办单位：中国化学会
- 学会名称：中国化学会
- 页数：1
- 文件大小：253k
- 原文格式：D
- 会议级别：全国
摘要
通过将多种染料逐步地共敏化纳米晶二氧化钛光阳极,从而达到光谱互补的效果,这种理念已经在染料敏化太阳能电池效率的提高方面取得了一定的成果。筛选不同尺寸的染料分子~([1])进行共敏化得到越来越多的关注,然而将具有光谱互补性能的大尺寸分子进行有效的共敏化鲜有讨论。我们选择了两种大尺寸染料分子:卟啉染料(LP2)和钌类染料(N719),这两种染料具有很好的光谱互补性能。通过比较两种染料的分子结构,LP2具有一个锚定基团,N719具有四个锚定基团包括两个羧基基团和两个羧酸酯基团,并且都能有效的吸附到二氧化钛上,进而增强N719与二氧化钛膜之间的键合作用~([2]),提高其在二氧化钛膜上的吸附-渗透性,最终达到N719对LP2的"置换"作用。通过紫外可见吸收光谱,能谱仪(EDS)和电子探针微量分析仪(EPMA)对这种竞争吸附的现象进行了表征说明。通过一系列优化实验,共敏化电池的效率相较于单一染料(LP2和N719)敏化的电池效率提高了38.6%和14.5%。
Stepwise co-sensitization of TiO_2 films with multiple sensitizers with complementary absorption spectra is a concept that has generated promising results in dye-sensitized solar cells(DSSCs). Screening co-sensitizers with different sizes(large and small) has gained much attention. In contrast, co-sensitization with two or more large molecules has been less discussed. Herein we chose two large dye molecules-porphyrin(LP2) and ruthenium-based(N719) sensitizers with complementary absorption bands as co-sensitizers. By comparing with LP2 containing one anchoring group, N719 possesses four anchoring units including two carboxylic acid groups and two carboxylate esters, which can strengthen their binding onto TiO_2 particles and enhance their adsorption-dispersion into the TiO_2 film, resulting in the "replacement reaction" between N719 and LP2. The competitive adsorption of the co-sensitizers is investigated by using UV-visible absorption spectra, energy dispersive spectrometer(EDS) and electron probe microanalysis(EPMA). Upon optimization, the co-sensitized device exhibited efficiency enhancement of 38.6% and 14.5% comparing with the devices fabricated with single LP2 or N719.
Stepwise co-sensitization of TiO_2 films with multiple sensitizers with complementary absorption spectra is a concept that has generated promising results in dye-sensitized solar cells(DSSCs). Screening co-sensitizers with different sizes(large and small) has gained much attention. In contrast, co-sensitization with two or more large molecules has been less discussed. Herein we chose two large dye molecules-porphyrin(LP2) and ruthenium-based(N719) sensitizers with complementary absorption bands as co-sensitizers. By comparing with LP2 containing one anchoring group, N719 possesses four anchoring units including two carboxylic acid groups and two carboxylate esters, which can strengthen their binding onto TiO_2 particles and enhance their adsorption-dispersion into the TiO_2 film, resulting in the "replacement reaction" between N719 and LP2. The competitive adsorption of the co-sensitizers is investigated by using UV-visible absorption spectra, energy dispersive spectrometer(EDS) and electron probe microanalysis(EPMA). Upon optimization, the co-sensitized device exhibited efficiency enhancement of 38.6% and 14.5% comparing with the devices fabricated with single LP2 or N719.
引文
[1]Loc H.Nguyen;Hemant K.Mulmudi;Dharani Sabba et al.Phys.Chem.Chem.Phys.2012,14:16182.
[2]Kee Eun Lee;Mario A.Gomez;Samir Elouatik;George P.Langmuir.2010,26:9575.
[2]Kee Eun Lee;Mario A.Gomez;Samir Elouatik;George P.Langmuir.2010,26:9575.