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A Triphenylamine–Naphthalenediimide–Fullerene Triad: Synthesis, Photoinduced Charge Separation and Solution-Processable Bulk Heterojunction Solar Cells
- Title
- A Triphenylamine–Naphthalenediimide–Fullerene Triad: Synthesis, Photoinduced Charge Separation and Solution-Processable Bulk Heterojunction Solar Cells
- Authors
- Srivani D.; Gupta A.; Bhosale S.V.; Ohkubo K.; Bhosale R.S.; Fukuzumi S.; Bilic A.; Jones L.A.
- Ewha Authors
- Shunichi Fukuzumi
- SCOPUS Author ID
- Shunichi Fukuzumi
- Issue Date
- 2018
- Journal Title
- Asian Journal of Organic Chemistry
- ISSN
- 2193-5807
- Citation
- Asian Journal of Organic Chemistry vol. 7, no. 1, pp. 220 - 226
- Keywords
- bulk heterojunctions; fullerenes; naphthalenediimide; photoinduced charge separation; triphenylamine
- Publisher
- Wiley-VCH Verlag
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- Abstract
- A new naphthalenediimide (NDI) derivative linked to triphenylamine (TPA) and fullerene (TPA–NDI–C60 triad; S3) was designed, synthesized and characterized. Femtosecond laser transient absorption spectral measurements revealed that fast electron transfer from TPA to the singlet-excited state of NDI occurred to form a charge-separated state (TPA.+–NDI.−–C60) with a rate constant of approximately 1012 s−1, followed by the charge-shift reaction from NDI.− to C60 to produce the charge-separated state (TPA.+–NDI–C60 .−) that decayed by back electron transfer with a rate constant of 4.4×109 s−1 (with a corresponding lifetime of 230 ps). Organic bulk heterojunction solar cells were fabricated using the triad S3 as an n-type semiconductor along with the conventional donor polymer poly(3-hexylthiophene). The power conversion efficiency reached 3.03 % before annealing and 4.85 % after annealing in the optimized devices. To rationalize the performance of these organic photovoltaic devices, atomic force microscopy was used to study the morphology of poly(3-hexylthiophene):S3 blend surfaces, which were found to be well interlaced and free from projections, lumps, or indentations. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
- DOI
- 10.1002/ajoc.201700557
- Appears in Collections:
- 자연과학대학 > 화학·나노과학전공 > Journal papers
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