Deciphering the Role of Fluorination: Morphological Manipulation Prompts Charge Separation and Reduces Carrier Recombination in All-Small-Molecule Photovoltaics
文献类型：期刊论文
| 作者 | Tang, Hua1,4,6; Yan, Cenqi4; Karuthedath, Safakath5; Yin, Hang2,3,4; Gao, Yajun5; Gao, Jie6; Zhang, Lerun4; Huang, Jiaming4; So, Shu Kong2,3; Kan, Zhipeng6 |
| 刊名 | SOLAR RRL
 |
| 出版日期 | 2020-01-29 |
| 页码 | 11 |
| 关键词 | carrier lifetime charge separation energetic disorders fluorination organic solar cells |
| ISSN号 | 2367-198X |
| DOI | 10.1002/solr.201900528 |
| 通讯作者 | Kan, Zhipeng(kanzhipeng@cigit.ac.cn) ; Li, Gang(gang.w.li@polyu.edu.hk) ; Lu, Shirong(lushirong@cigit.ac.cn) |
| 英文摘要 | Fluorination has proven effective in increasing the absorption, downshifting the energy levels, and enhancing the crystallinity of high-performance fused-ring electron acceptors (FREAs). However, an in-depth understanding of the effects of fluorination is still lacking, as research efforts have mainly focused on increasing the power conversion efficiency (PCE). In addition, fluorination on FREAs has rarely been reported in all-small-molecule organic solar cells (ASM OSCs). Herein, fluorination on FREAs is systematically studied in ASM OSCs using the popular FREA 2,2 '-((2Z,2 ' Z)-((4,4,9,9-tetrahexyl-4,9-dihydro-s-indaceno[1,2-b:5,6-b ']dithiophene-2,7-diyl)bis(methanylylidene))bis(3-oxo-2,3-dihydro-1H-indene-2,1-diylidene))dimalononitrile and its fluorinated analog paired with DRCN5T, an oligothiophene donor seldom investigated in ASM OSCs to date. (Photo)physical studies are conducted on both systems and it is identified that, along with the aforementioned ones, fluorination exerts several additional effects, including the following. First, it optimizes the morphology, thereby accelerating charge separation and reducing geminate recombination charge pairs; second, it suppresses energetic disorder; and third, it prolongs the carrier lifetime and thus aids charge extraction. Consequently, the short-circuit current density and fill factor are significantly enhanced, and in turn, the PCE yields a 36% improvement, climbing to 9.25% and rivaling that of the current state-of-the-art oligothiophene-donor/nonfullerene ASM OSCs. The insights decipher the working mechanism of ASM OSCs that use fluorinated FREAs, paving the way toward high-performance ASM OSCs. |
| 资助项目 | Youth Innovation Fund[Y82A260Q10] ; National Natural Science Foundation of China[61805245] ; CAS Pioneer Hundred Talents Program[Y82A060Q10] ; CAS Pioneer Hundred Talents Program[Y92A160Q10] ; Research Grants Council of Hong Kong[15218517] ; Research Grants Council of Hong Kong[C5037-18G] ; Shenzhen Science and Technology Innovation Commission[JCYJ20170413154602102] ; Hong Kong Polytechnic University[1-ZE29] ; National Youth Thousand Program Project[R52A199Z11] ; National Special Funds for Repairing and Purchasing Scientific Institutions[Y72Z090Q10] ; Artificial Intelligence Key Project of Chongqing[cstc2017rgzn-zdyfX0030] ; King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR)[OSR-2018-CARF/CCF-3079] |
| WOS研究方向 | Energy & Fuels ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000509823400001 |
| 出版者 | WILEY-V C H VERLAG GMBH |
| 源URL | [http://119.78.100.138/handle/2HOD01W0/10192]  |
| 专题 | 中国科学院重庆绿色智能技术研究院 |
| 通讯作者 | Kan, Zhipeng; Li, Gang; Lu, Shirong |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Hong Kong Baptist Univ, Inst Adv Mat, Kowloon Tong, Hong Kong, Peoples R China 3.Hong Kong Baptist Univ, Dept Phys, Kowloon Tong, Hong Kong, Peoples R China 4.Hong Kong Polytech Univ, Dept Elect & Informat Engn, Hung Hum, Kowloon, Hong Kong, Peoples R China 5.King Abdullah Univ Sci & Technol, Phys Sci & Engn Div PSE, Solar Ctr, Thuwal 239556900, Saudi Arabia 6.Chinese Acad Sci, Organ Semicond Res Ctr, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tang, Hua,Yan, Cenqi,Karuthedath, Safakath,et al. Deciphering the Role of Fluorination: Morphological Manipulation Prompts Charge Separation and Reduces Carrier Recombination in All-Small-Molecule Photovoltaics[J]. SOLAR RRL,2020:11. |
| APA | Tang, Hua.,Yan, Cenqi.,Karuthedath, Safakath.,Yin, Hang.,Gao, Yajun.,...&Lu, Shirong.(2020).Deciphering the Role of Fluorination: Morphological Manipulation Prompts Charge Separation and Reduces Carrier Recombination in All-Small-Molecule Photovoltaics.SOLAR RRL,11. |
| MLA | Tang, Hua,et al."Deciphering the Role of Fluorination: Morphological Manipulation Prompts Charge Separation and Reduces Carrier Recombination in All-Small-Molecule Photovoltaics".SOLAR RRL (2020):11. |
入库方式： OAI收割
来源：重庆绿色智能技术研究院
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。