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Efficient solution-processed small-molecule solar cells by insertion of graphene quantum dots
Cited 26 time in
Web of Science
Cited 27 time in Scopus
- Authors
- Issue Date
- 2014-10
- Publisher
- Royal Society of Chemistry
- Citation
- Nanoscale, Vol.6 No.24, pp.15175-15180
- Abstract
- In this work, we have demonstrated the results of several positive effects that arise from the addition of graphene quantum dots (GQDs) to solution-processed small molecule bulk-heterojunction (SM-BHJ) solar cells fabricated from a p-DTS(FBTTh2)(2)/[6,6]-phenyl C-71 butyric acid methyl-ester (PC71BM). The device with an optimized ratio of GQDs exhibits increased current density and fill factor owing to 10% improved external quantum efficiency (EQE) and induction of a favorable SM-BHJ morphology. Additionally, the multiple scattering of the GQDs in the SM-BHJ leads to longer optical pathlengths according to the analysis of diffuse reflectance spectra and UV/Vis absorption spectra. The GQD inserted SM-BHJ film at the optimized concentration exhibits decreased charge transport resistance significantly by impedance measurements with effective charge extraction in the device which contributes to 15% enhancement of power conversion efficiency (PCE).
- ISSN
- 2040-3364
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