Significant improvement of photovoltaic performance by embedding thiophene in solution-processed star-shaped TPA-DPP backbone
文献类型：期刊论文
| 作者 | Tang, Ailing1,4; Li, Liangjie2,3; Lu, Zhenhuan1; Huang, Jianhua1; Jia, Hui1; Zhan, Chuanlang1; Tan, Zhan'ao2,3; Li, Yongfang2; Yao, Jiannian1 |
| 刊名 | JOURNAL OF MATERIALS CHEMISTRY A
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| 出版日期 | 2013 |
| 卷号 | 1期号:18页码:5747-5757 |
| ISSN号 | 2050-7488 |
| DOI | 10.1039/c3ta10640c |
| 英文摘要 | Solution-processed star-shaped triphenylamine (TPA) derivatives and dialkylated diketopyrrolopyrrole (DPP)-based small molecules have been widely studied because they both yield promising photon-to-electron conversion. However, the power conversion efficiency (PCE) of covalent star-shaped TPA-DPP derivatives is still very low. To design star-shaped TPA-DPP derivatives with better photovoltaic performance, we embedded a thiophene ring in between the TPA and DPP units, namely TPA-T-DPP, and reported the comparative studies of the optoelectronic and photovoltaic properties of TPA-DPP and TPA-T-DPP. Benefiting from the covalent thiophene bridges, compared to the TPA-DPP solid film, the TPA-T-DPP film showed enhanced light-harvesting ability, for instance, an improved absorptivity (Abs. = 1.72/100 nm vs. 1.23/100 nm), a broader absorption band (131 nm vs. 107 nm) and a narrower band gap (1.86 eV vs. 1.91 eV), from cyclic voltammetry. Studies on the photovoltaic properties revealed that the best TPA-T-DPP:PC71BM based device showed a dramatically enhanced PCE of 2.95%, increased by 2.14 times with respect to the efficiency of the best TPA-DPP based device (1.38%). The improvement of PCE also was observed in the small molecule:PC61BM based devices (1.81% vs. 1.13%). Test of the hole mobilites of the active layer provided further insight into the impact of the embedded thiophene units. The hole mobility of the TPA-T-DPP: PC71BM blended films was higher by about one order of magnitude (1.16 x 10(-2) cm(2) V-1 s(-1)) than that of the TPA-DPP:PC71BM blended films (3.85 x 10(-3) cm(2) V-1 s(-1)). These results clearly indicated that embedding the thiophene ring enlarged the conjugation, thus enhanced the light-harvesting ability and hole mobility, while further significantly improving the device performance. Additionally, TPA-T-DPP was also used as the electron-acceptor material, and the best P3HT:TPA-T-DPP based device exhibited a very high open-circuit voltage (1.14 V), which was among the highest values reported for single-layered OSC devices. |
| 语种 | 英语 |
| WOS记录号 | WOS:000317584700038 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/54709]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Tang, Ailing |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, CAS Key Lab Photochem, Beijing Natl Lab Mol Sci, Beijing 100039, Peoples R China 2.Chinese Acad Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing 100039, Peoples R China 3.North China Elect Power Univ, New & Renewable Energy Beijing Key Lab, State Key Lab Alternate Elect Power Syst Renewabl, Beijing, Peoples R China 4.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, Ailing,Li, Liangjie,Lu, Zhenhuan,et al. Significant improvement of photovoltaic performance by embedding thiophene in solution-processed star-shaped TPA-DPP backbone[J]. JOURNAL OF MATERIALS CHEMISTRY A,2013,1(18):5747-5757. |
| APA | Tang, Ailing.,Li, Liangjie.,Lu, Zhenhuan.,Huang, Jianhua.,Jia, Hui.,...&Yao, Jiannian.(2013).Significant improvement of photovoltaic performance by embedding thiophene in solution-processed star-shaped TPA-DPP backbone.JOURNAL OF MATERIALS CHEMISTRY A,1(18),5747-5757. |
| MLA | Tang, Ailing,et al."Significant improvement of photovoltaic performance by embedding thiophene in solution-processed star-shaped TPA-DPP backbone".JOURNAL OF MATERIALS CHEMISTRY A 1.18(2013):5747-5757. |
入库方式： OAI收割
来源：化学研究所
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