| Increasing h-aggregation of p-dts(fbtth2)(2) to improve photovoltaic efficiency by solvent vapor annealing | |
| Zhao, Qiaoqiao1,2; Yu, Xinhong1,2; Liu, Jiangang1,2; Xie, Zhiyuan1,2; Han, Yanchun1,2 | |
| 刊名 | Organic electronics
 |
| 2016-10-01 | |
| 卷号 | 37页码:6-13 |
| 关键词 | H-aggregation J-aggregation Small molecular solar cell Bhj Solvent vapor annealing |
| ISSN号 | 1566-1199 |
| DOI | 10.1016/j.orgel.2016.05.044 |
| 通讯作者 | Liu, jiangang(niitawh@ciac.jl.cn) ; Han, yanchun(ychan@ciac.jl.cn) |
| 英文摘要 | The proper crystallinity and a balance between h-aggregation and j-aggregation are both necessary for the best performance of small molecule organic solar cells. it is well known that j-aggregation is favorable to form more excitons due to its narrower bad-gap, leading to a high photocurrent. while h-aggregation has a higher lowest excited level which could provide stronger driving force for exciton dissociation. however, for 7,7'-(4,4-bis(2-ethylhexyl)-4h-silolo[3,2-b:4,5-b'] dithiophene-2,6-diyl)bis(6-fluoro-4(5'-hexyl-[2,2'-bithiophen]-5-yl)benzo[c][1,2,5]thiadiazole) (p-dts(fbtth2)(2))/[6,6]-phenyl-c-71-butyric acid methyl ester (pc70bm) blend system, the crystallinity is very low and p-dts(fbtth2)(2) is mainly in j-aggregation. thus, increasing h-aggregation of p-dts(fbtth2)(2) is an effective way to improve photovoltaic efficiency of p-dts(fbtth2)(2)/pc70bm system. in this paper, it was found that solvent vapor annealing (sva) was an effective method to improve the crystallinity and the h-aggregation of p-dts(fbtth2)(2) in blend film. due to the prolonged time for self-organization, the crystallinity of p-dts(fbtth2) 2 was enhanced. in addition, molecular motion ability of p-dts(fbtth2)(2) was controlled and p-dts(fbtth2) 2 could adjust its structure to form h-aggregation. as a result, the ratio of h/j could be tuned from 0.71 to 1.47 and the power conversion efficiencies (pce) was improved from 2.64% to 6.63%. (c) 2016 published by elsevier b.v. |
| WOS关键词 | ORGANIC SOLAR-CELLS ; BENZODITHIOPHENE UNIT ; SMALL MOLECULES ; SEMICONDUCTORS ; PERFORMANCE ; DONOR ; MORPHOLOGY ; STRATEGY ; BEHAVIOR ; DESIGN |
| WOS研究方向 | Materials Science ; Physics |
| WOS类目 | Materials Science, Multidisciplinary ; Physics, Applied |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000382248000002 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2376247 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Liu, Jiangang; Han, Yanchun |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, 5625 Renmin St, Changchun 130022, Peoples R China 2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Qiaoqiao,Yu, Xinhong,Liu, Jiangang,et al. Increasing h-aggregation of p-dts(fbtth2)(2) to improve photovoltaic efficiency by solvent vapor annealing[J]. Organic electronics,2016,37:6-13. |
| APA | Zhao, Qiaoqiao,Yu, Xinhong,Liu, Jiangang,Xie, Zhiyuan,&Han, Yanchun.(2016).Increasing h-aggregation of p-dts(fbtth2)(2) to improve photovoltaic efficiency by solvent vapor annealing.Organic electronics,37,6-13. |
| MLA | Zhao, Qiaoqiao,et al."Increasing h-aggregation of p-dts(fbtth2)(2) to improve photovoltaic efficiency by solvent vapor annealing".Organic electronics 37(2016):6-13. |
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