Journal
CHINESE PHYSICS B
Volume 26, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1674-1056/26/2/028801
Keywords
carbon nanotube; transparent electrode; organic solar cells; stretchability
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Funding
- National Basic Research Program of China [2012CB932302]
- National Natural Science Foundation of China [11634014, 51172271, 51372269, 51472264]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDA09040202]
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In this work, we have presented a freestanding and flexible CNT-based film with sheet resistance of 60 Omega/rectangle and transmittance of 82% treated by nitric acid and chloroauric acid in sequence. Based on modified CNT film as a transparent electrode, we have demonstrated an ultrathin, flexible organic solar cell (OSC) fabricated on 2.5-mu m PET substrate. The efficiency of OSC, combined with a composite film of poly (3-hexylthiophene) (P3HT) and phenyl-C61 butyric acid methyl ester (PCBM) as an active layer and with a thin layer of methanol soluble biuret inserted between the photoactive layer and the cathode, can be up to 2.74% which is approximate to that of the reference solar cell fabricated with ITO-coated glass (2.93%). Incorporating the as-fabricated ITO-free OSC with pre-stretched elastomer, 50% compressive deformation can apply to the solar cells. The results show that the as-prepared CNT-based hybrid film with outstanding electrical and optical properties could serve as a promising transparent electrode for low cost, flexible and stretchable OSCs, which will broaden the applications of OSC and generate more solar power than it now does.
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