Universal and versatile morphology engineering via hot fluorous solvent soaking for organic bulk heterojunction
| Autor: | Qinye Bao, Yan Wang, Ming Zhang, Yi Zhang, Jingsong Huang, Chun-Chao Chen, Qi Chen, Ziyi Xie, Feng Liu, Tong Shan, Liwei Chen, Hongliang Zhong, Xin Wang, Qingyun Wei, Jinqiu Xu, Cheng Wang |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Solar cells
Materials science Organic solar cell Science General Physics and Astronomy 02 engineering and technology 010402 general chemistry 01 natural sciences Miscibility General Biochemistry Genetics and Molecular Biology Polymer solar cell Article Photovoltaics Upper critical solution temperature lcsh:Science chemistry.chemical_classification Multidisciplinary business.industry General Chemistry Polymer 021001 nanoscience & nanotechnology Acceptor 0104 chemical sciences Solvent Chemical engineering chemistry lcsh:Q 0210 nano-technology business |
| Zdroj: | Nature Communications, Vol 11, Iss 1, Pp 1-11 (2020) Nature Communications Nature communications, vol 11, iss 1 |
| ISSN: | 2041-1723 |
| Popis: | After explosive growth of efficiency in organic solar cells (OSCs), achieving ideal morphology of bulk heterojunction remains crucial and challenging for advancing OSCs into consumer market. Herein, by utilizing the amphiphobic nature and temperature-dependent miscibility of fluorous solvent, hot fluorous solvent soaking method is developed to optimize the morphology with various donor/acceptor combinations including polymer/small-molecule, all-polymer and all-small-molecule systems. By immersing blend film into hot fluorous solvent which is utilized as liquid medium with better thermal conductivity, the molecular reorganization is accelerated. Furthermore, fluorous solvent can be miscible with the residue of chloroform and chloronaphthalene above upper critical solution temperature. This mixed solvent diffuses around inside the active layer and selectively promotes molecular reorganization, leading to optimized morphology. Compared to widely-used thermal annealing, this approach processed under mild conditions achieves superior photovoltaic performance, indicating the practicality and universality for morphological optimization in OSCs as well as other optoelectronic devices. Morphology control of bulk heterojunction organic solar cells has been a challenge for realising optimal photovoltaic performance. Here, the authors utilise amphiphobic nature and temperature-dependent miscibility of fluorous solvent to promote molecular reorganisation and morphological optimisation. |
| Databáze: | OpenAIRE |
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