Influences of CdSe NCs on the photovoltaic parameters of BHJ organic solar cells
Autor: | Fatih Ongul, Ç. Allahverdi, Mehmet Kazici, Serap Günes, Sureyya Aydin Yuksel, Sinem Bozar |
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Rok vydání: | 2018 |
Předmět: |
Absorption spectroscopy
Organic solar cell Chemistry Scanning electron microscope Energy conversion efficiency 02 engineering and technology Hybrid solar cell 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics Polymer solar cell 0104 chemical sciences Analytical Chemistry Photoactive layer Nanocrystal Chemical engineering 0210 nano-technology Instrumentation Spectroscopy |
Zdroj: | Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 194:50-56 |
ISSN: | 1386-1425 |
DOI: | 10.1016/j.saa.2018.01.012 |
Popis: | In this study, the high quality CdSe nanocrystals (NCs) capped with stearic acid were synthesized in a solvent and then purified four times by using the precipitation and redissolution process. The average size of the synthesized CdSe NCs was determined ~ 3.0 nm via transmission electron microscopy (TEM) measurement and their corresponding optical band edge energy was also calculated as ~ 2.1 eV using ultraviolet-visible (UV–Vis) absorption spectroscopy. The bulk heterojunction (BHJ) hybrid solar cells based on a ternary system including P3HT, PCBM and CdSe NCs at different weight concentrations (0 wt%, 0.1 wt%, 0.5 wt%, 1 wt% and 2 wt%) were fabricated by spin-casting process. The effect of the concentration of CdSe NCs on the photovoltaic parameters of these BHJ organic solar cells was investigated. The surface morphology of the photoactive layer modified by the incorporation of CdSe NCs into P3HT:PCBM matrix was observed with scanning electron microscopy (SEM). It was shown that when the concentration of CdSe NCs increases above 0.1 wt% in this ternary system, the photovoltaic performance of the devices significantly decreases. The power conversion efficiency of the organic photovoltaic (OPV) device was enhanced ~ 20% by incorporating CdSe NCs with 0.1 wt% with respect to those without CdSe NCs. |
Databáze: | OpenAIRE |
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