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Prof. Sohair Negm :: Publications:

Surface modification of CdSe nanocrystals: Application to polymer solar cell
Authors: Author links open overlay panelM.NabilaShaimaa A.MohamedbcdK.EasawiaSalah S.A.ObayyacS.NegmaH.TalaateM.K.El-Mansyf
Year: 2020
Keywords: PhotovoltaicCdSe nanocrystalSurface passivationIodide ligand
Journal: Current Applied Physics
Volume: Volume 20
Issue: Issue 3
Pages: Pages 470-476
Publisher: ELSEVIER
Local/International: International
Paper Link:
Full paper Sohair Negm _10.1016@j.cap.2020.01.001.pdf
Supplementary materials Not Available

The optimum choice of the ligand that stabilizes the colloidal quantum dots and passivate the surface is crucial for tuning the energy level and remain elusive. The atomic ligand passivation with iodide remains superior over other surface treatments. Herein, we applied the iodide ligand to passivate the CdSe nanocrystals with an excitonic absorption at 2.1 eV by a liquid-liquid extraction process. We took the view of the change in the optical and structural properties upon ligand exchange. Finally, we tested the performance of the iodide treated dots by employing it in an inverted structure polymer solar cell based on P3HT: PCBM.

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