Vertical Stratification Engineering for Organic Bulk-Heterojunction Devices
文献类型：期刊论文
| 作者 | Huang, Liqiang1; Wang, Gang2; Zhou, Weihua1; Fu, Boyi2; Cheng, Xiaofang1; Zhang, Lifu1; Yuan, Zhibo2; Xiong, Sixing3; Zhang, Lin4; Xie, Yuanpeng1 |
| 刊名 | ACS NANO
 |
| 出版日期 | 2018-05-01 |
| 卷号 | 12期号:5页码:4440-4452 |
| ISSN号 | 1936-0851 |
| 关键词 | Stratification Engineering Surface Energy Organic Bulk-heterojunction Organic Photovoltaics Interface Engineering Self-assembled Small Molecule External Quantum Efficiency |
| DOI | 10.1021/acsnano.8b00439 |
| 英文摘要 | High-efficiency organic solar cells (OSCs) can be produced through optimization of component molecular design, coupled with interfacial engineering and control of active layer morphology. However, vertical stratification of the bulk-heterojunction (BHJ), a spontaneous activity that occurs during the drying process, remains an intricate problem yet to be solved. Routes toward regulating the vertical separation profile and evaluating the effects on the final device should be explored to further enhance the performance of OSCs. Herein, we establish a connection between the material surface energy, absorption, and vertical stratification, which can then be linked to photovoltaic conversion characteristics. Through assessing the performance of temporary, artificial vertically stratified layers created by the sequential casting of the individual components to form a multilayered structure, optimal vertical stratification can be achieved. Adjusting the surface energy offset between the substrate results in donor and acceptor stabilization of that stratified layer. Further, a trade-off between the photocurrent generated in the visible region and the amount of donor or acceptor in close proximity to the electrode was observed. Modification of the substrate surface energy was achieved using self-assembled small molecules (SASM), which, in turn, directly impacted the polymer donor to acceptor ratio at the interface. Using three different donor polymers in conjunction with two alternative acceptors in an inverted organic solar cell architecture, the concentration of polymer donor molecules at the ITO (indium tin oxide)/BHJ interface could be increased relative to the acceptor. Appropriate selection of SASM facilitated a synchronized enhancement in external quantum efficiency and power conversion efficiencies over 10.5%. |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| WOS记录号 | WOS:000433404500039 |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/42745]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Wang, Gang; Reichmanis, Elsa; Chen, Yiwang |
| 作者单位 | 1.Nanchang Univ, Coll Chem, 999 Xuefu Ave, Nanchang 330031, Jiangxi, Peoples R China 2.Georgia Inst Technol, Sch Chem & Biomol Engn, Sch Chem & Biochem, Sch Mat Sci & Engn, Atlanta, GA 30332 USA 3.Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Sch Opt & Elect Informat, Wuhan 430074, Hubei, Peoples R China 4.Xi An Jiao Tong Univ, State Key Lab Mech Behav Mat, Xian 710049, Peoples R China 5.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Inst Chem, CAS Key Lab Organ Solids, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Huang, Liqiang,Wang, Gang,Zhou, Weihua,et al. Vertical Stratification Engineering for Organic Bulk-Heterojunction Devices[J]. ACS NANO,2018,12(5):4440-4452. |
| APA | Huang, Liqiang.,Wang, Gang.,Zhou, Weihua.,Fu, Boyi.,Cheng, Xiaofang.,...&Chen, Yiwang.(2018).Vertical Stratification Engineering for Organic Bulk-Heterojunction Devices.ACS NANO,12(5),4440-4452. |
| MLA | Huang, Liqiang,et al."Vertical Stratification Engineering for Organic Bulk-Heterojunction Devices".ACS NANO 12.5(2018):4440-4452. |
入库方式： OAI收割
来源：化学研究所
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