| A polymer acceptor with an optimal lumo energy level for all-polymer solar cells | |
| Ding, Zicheng1; Long, Xiaojing1,2; Dou, Chuandong1; Liu, Jun1; Wang, Lixiang1 | |
| 刊名 | Chemical science
 |
| 2016 | |
| 卷号 | 7期号:9页码:6197-6202 |
| ISSN号 | 2041-6520 |
| DOI | 10.1039/c6sc01756h |
| 通讯作者 | Dou, chuandong(chuandong.dou@ciac.ac.cn) ; Liu, jun(liujun@ciac.ac.cn) |
| 英文摘要 | A key parameter for polymer electron acceptors is the lowest unoccupied molecular orbital (lumo) energy level (e-lumo). for state-of-the-art polymer electron acceptors based on the naphthalene diimide (ndi) unit, their e-lumo are low-lying and cannot be tuned, leading to a low open-circuit voltage (v-oc) of the resulting all-polymer solar cells (all-pscs). we report that polymer electron acceptors based on the double b <- n bridged bipyridine (bnbp) unit exhibit tunable elumo because of their delocalized lumos over polymer backbones. the e-lumo of the copolymer of the bnbp unit and selenophene unit (p-bnbp-se) is lower by 0.16 ev than that of the copolymer of the bnbp unit and thiophene unit (p-bnbp-t). as a result, the energy levels of p-bnbp-se match well with the widely-used polymer donor, poly[(ethylhexylthiophenyl)- benzodithiophene-(ethylhexyl)-thienothiophene] (ptb7-th). the electron mobility of pbnbp- se (mu(e) = 2.07 x 10(-4) cm(2) v-1 s(-1)) is also higher than that of p-bnbp-t ((mu(e) = 7.16 x 10(-5) cm(2) v-1 s(-1)). while the all-psc device based on the ptb7-th: p-bnbp-t blend shows a moderate power conversion efficiency (pce) of 2.27%, the corresponding device with p-bnbp-se as the acceptor exhibits a pce as high as 4.26%. moreover, owing to the suitable elumo of p-bnbp-se, the all-psc device of pbnbp- se shows a voc up to 1.03 v, which is higher by 0.22 v than that with the conventional ndi-based polymer acceptor. these results indicate that bnbp-based polymers can give all-pscs with high pces, remarkably high voc values and small photon energy losses. |
| WOS关键词 | POWER CONVERSION EFFICIENCY ; CONJUGATED POLYMERS ; PHOTOVOLTAIC CELLS ; BLEND MORPHOLOGY ; MOLECULAR-WEIGHT ; DONOR ; AGGREGATION ; COPOLYMER ; MOBILITY ; ORIENTATION |
| WOS研究方向 | Chemistry |
| WOS类目 | Chemistry, Multidisciplinary |
| 语种 | 英语 |
| 出版者 | ROYAL SOC CHEMISTRY |
| WOS记录号 | WOS:000382488500071 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2375161 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Dou, Chuandong; Liu, Jun |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100864, Peoples R China |
| 推荐引用方式 GB/T 7714 | Ding, Zicheng,Long, Xiaojing,Dou, Chuandong,et al. A polymer acceptor with an optimal lumo energy level for all-polymer solar cells[J]. Chemical science,2016,7(9):6197-6202. |
| APA | Ding, Zicheng,Long, Xiaojing,Dou, Chuandong,Liu, Jun,&Wang, Lixiang.(2016).A polymer acceptor with an optimal lumo energy level for all-polymer solar cells.Chemical science,7(9),6197-6202. |
| MLA | Ding, Zicheng,et al."A polymer acceptor with an optimal lumo energy level for all-polymer solar cells".Chemical science 7.9(2016):6197-6202. |
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