Improving the performance of solution-processed organic solar cells by incorporating small molecule acceptors into a ternary bulk heterojunction based on DH6T:Mq3:PCBM (M = Ga, Al)

Muhammad, Fahmi F. and Yahya, Mohd Yazid and Sulaiman, Khaulah (2017) Improving the performance of solution-processed organic solar cells by incorporating small molecule acceptors into a ternary bulk heterojunction based on DH6T:Mq3:PCBM (M = Ga, Al). Materials Chemistry and Physics, 188. pp. 86-94. ISSN 02540584

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Abstract

Improvement in the overall performance of solution-processed organic solar cells based on a ternary heterostructure was realized by means of incorporating small molecules of tris(8-hydroxyquinoline) gallium (Gaq3) or Alq3 electron acceptors. The donor host polymer was α,ω-dihexyl-sexithiophene (DH6T), while the ultimate acceptor was fullerene (PC61BM). The results showed that short circuit current (ISc), open circuit voltage (Voc), and fill factor (FF) of the devices were pronouncedly enhanced by the inclusion of Gaq3 or Alq3. The maximum output power and conversion efficiency of the ternary devices were increased by an order of 5.8 times compared to that of the control devices. These improvements were ascribed to the broadened light absorption, energy levels alignment between the donor-acceptor components, a balanced charge transfer, and increased crystallinity of the devices active layer. The results were ascertained and analyzed by means of UV–Vis, PL, XRD, IV and TEM investigations.

Item Type:	Article
Uncontrolled Keywords:	Composite materials, Organometallic compounds, Coatings, TEM
Subjects:	Q Science > Q Science (General) Q Science > QC Physics
Divisions:	Faculty of Science and Health > Department of Physics
Depositing User:	Dr Fahmi F. Muhammad
Date Deposited:	09 Sep 2017 16:54
Last Modified:	09 Sep 2017 17:37
URI:	http://eprints.koyauniversity.org/id/eprint/108

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