Academic Journal
Theoretical Study on the Photoelectric Properties of a Class of Copolymers Based on Benzodithiophene for Solar Cells
| العنوان: | Theoretical Study on the Photoelectric Properties of a Class of Copolymers Based on Benzodithiophene for Solar Cells |
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| المؤلفون: | Xiao-Hua Xie, Xin-Wei Zhao, Ming Li |
| المصدر: | International Journal of Polymer Science, Vol 2018 (2018) |
| بيانات النشر: | Wiley, 2018. |
| سنة النشر: | 2018 |
| المجموعة: | LCC:Chemical technology |
| مصطلحات موضوعية: | Chemical technology, TP1-1185 |
| الوصف: | The structural, electronic, and optical properties of PBDTTBT are comprehensively studied by density functional theory to rationalize the experimentally observed properties. Periodic boundary conditions method is employed to simulate the polymer block and calculate effective charge mass from the band structure calculation to describe charge transport properties. Moreover, both time-dependent density functional theory and a set of multidimensional visualization techniques are used to characterize the exciton dissociation ability in the PCBM: PBDTTBT interface. These theoretical methods and calculation techniques not only promote deep understanding of the connection between chemical structures and optical and electronic properties of the donor-acceptor system but also can be used to rationally design a novel donor-acceptor system. Based on the same calculated methods as PBDTTBT, four copolymers PBDTTTP, PBDTTTO, PBDTTTPD, and PBDTTFPD are designed to study their potentials as donors in polymer BHJ. The results indicate that PBDTTBT’s well conjugation benefits its good stability, and its wide and strong absorption spectra in the range of visible light, appropriate FMO levels, well charge transport, and favorable exciton dissociation lead to its photovoltaic performance. Furthermore, through comparing the four designed polymers with PBDTTBT, we conclude that the four designed polymers have stronger exciton dissociation ability and larger open-circuit voltage and external quantum efficiencies. Consequently, the four designed copolymers are promising candidates for polymer BHJ solar cells. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1687-9422 1687-9430 |
| Relation: | https://doaj.org/toc/1687-9422; https://doaj.org/toc/1687-9430 |
| DOI: | 10.1155/2018/3270313 |
| URL الوصول: | https://doaj.org/article/3cde1e73a23f43649d8e98d16c8925e9 |
| رقم الانضمام: | edsdoj.3cde1e73a23f43649d8e98d16c8925e9 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 16879422 16879430 |
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| DOI: | 10.1155/2018/3270313 |