期刊
MOLECULES
卷 26, 期 20, 页码 -出版社
MDPI
DOI: 10.3390/molecules26206134
关键词
thieno[3,2-b]thiophene(TT)-substituted porphyrins; thiolalkyl chain; donor; organic solar cells (OSCs); devices
资金
- national key R&D program for international collaboration [2021YFE0191500]
- National Natural Science Foundation of China [51473053]
- Natural Science Foundation of Hunan Province [2019JJ50603]
- Peacock Team Project funding from the Shenzhen Science and Technology Innovation Committee [KQTD2015033110182370]
- Fundamental Research Project funding from Shenzhen Science and Technology Innovation Committee [JCYJ 20190809150213448]
A new porphyrin-based derivative small-molecule donor named as PorTT-T was designed and synthesized, showing better surface morphology and higher photovoltaic conversion efficiency. With the introduction of the S atom, PorTT-T exhibited better device performance.
To explore the effect of the introduction of heteroatoms on the properties of porphyrin materials, a new porphyrin-based derivative small-molecule donor named as PorTT-T was designed and synthesized based on alkyl-thieno[3,2-b]thiophene(TT)-substituted porphyrins. The linker bridge and end groups of PorTT-T were the same as those of XLP-II small-molecule donor materials, while the side-chain attached to the core of thieno[3,2-b]thiophene(TT)-substituted porphyrin was different. Measurements of intrinsic properties showed that PorTT-T has wide absorption and appropriate energy levels in the UV-visible range. A comparison of the morphologies of the two materials using atomic force microscopy showed that PorTT-T has a better surface morphology with a smaller root-mean-square roughness, and can present closer intermolecular stacking as compared to XLP-II. The device characterization results showed that PorTT-T with the introduced S atom has a higher open circuit voltage of 0.886 eV, a higher short circuit current of 12.03 mAcm(-2), a fill factor of 0.499, a high photovoltaic conversion efficiency of 5.32%, better external quantum efficiency in the UV-visible range, and higher hole mobility.
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