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Bent fluorescent solar concentrators (BFSCs): Spectroscopy, stability and outdoor performance
M.G. El-Shaarawy,S.M. El-Bashir,M. Hammam,M.K. El-Mansy 한국물리학회 2007 Current Applied Physics Vol.7 No.6
The spectroscopic properties of a coumarin derivative dye (macrolex uorescent red G) impregnated in a poly(methylmethacrylate)/silica hybrid matrix were studied. The stability of the hybrid against both light irradiation and raised temperature showed excellentweathering durability for use in uorescent solar concentrator (FSC) applications. A new geometry for FSCs was introduced, whichreceiving both direct and reected solar energy. The eect of the concentrator apex angle on solar energy conversion was studied. Theoptimum apex angle was found to correlate well to the location latitude.
Surface modification of CdSe nanocrystals: Application to polymer solar cell
M. Nabil,Shaimaa A. Mohamed,K. Easawi,Salah S.A. Obayya,S. Negm,H. Talaat,M.K. El-Mansy 한국물리학회 2020 Current Applied Physics Vol.20 No.3
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.