Journal of Nanoscience and Nanotechnology p. 1683 - 1686 (2015)
Update date:2022-08-25
Topics:
Park, Kyung-Yong
Lee, Jun-Sung
Namkung, Han-Sol
Koo, Min-Sik
Cho, Seong-Jin
Yoon, Byung-Woo
Kim, Young-Mo
Lee, Youn-Sik
Song, Seong-Hwan
Park, Dong-Kyu
Kim, Chung-Gi
We have synthesized water-soluble polymer, poly[(9,9-bis((6a?2-(N,N,N-trimethylammonium) hexyl)-2,7-fluorene))-alt-bisphenylfumaronitrile]dibromide (AHF-alt-PFN), the polymer typically obtained by the Suzuki type of polymerization reaction and shows good solubility in methanol. Bulk heterojunction polymer solar cells (BHJ-PSCs) fabricated by using water soluble conjugated polymer and positive (Cs+) and negative (F-, CO2-3) charge ions doping as an interfacial layer for poly(3-hexylthiophene):phenyl-C61 butyric acid methyl ester (P3HT: PCBM). We have achieved an enhancement of the short circuit density and power conversion efficiency in solar cell by introducing poly(AHF-alt-PFN) layer between the active layer and the cathode metal. The device with poly(AHF-alt-PRN) layer containing F-, CO23- showed a short circuit current density more 1.3, 2.3 times higher than those of the device without poly (AHF-alt-PFN) + ion layer. We explain the better performance in solar cell with poly (AHF-alt-PFN) + ion layer was due not only to the increase of electron mobility in poly (AHF-alt-PFN) layer but also to the decrease of the electron barrier near cathode by the addition of the negative ions.
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