Effects of nanomorphological changes on the performance of solar cells with blends of poly[9,9′-dioctyl-fluorene-co-bithiophene] and a soluble fullerene
Journal
Nanotechnology
Journal Volume
20
Journal Issue
2
Date Issued
2009
Author(s)
Abstract
Controlled nanophase segregation within the blended films of a conjugated polymer and a soluble fullerene has enabled us to form a continuous transfer pathway for the carriers, thereby increasing the photocurrent generation for polymer photovoltaic devices. Here, we study the effects of nanomorphological changes on the performance of polymer solar cells using blended films of poly[9,9′-dioctyl-fluorene-co-bithiophene] (F8T2) and [6,6]-phenyl-C61- butyric acid methyl ester (PCBM). Different weight ratios of the F8T2 and PCBM blends in various solvents were studied at different annealing temperatures. The morphology of the films seems to be a strong function of the processing conditions. The power conversion efficiency (PCE) of the photovoltaic devices has improved significantly from 0.34% to 2.14% under air mass 1.5 simulated solar illumination (100 mW cm-2), which could be attributed to the nanomorphological changes in the films. © IOP Publishing Ltd.
SDGs
Other Subjects
Conversion efficiency; Esters; Fatty acids; Fullerenes; Photocurrents; Photovoltaic cells; Photovoltaic effects; Polymer blends; Polymers; Segregation (metallography); Solar cells; Solar energy; Solar equipment; Solar power generation; Air masses; Annealing temperatures; Bithiophene; Blended films; Butyric acid methyl esters; Fluorene; Nanophase segregations; Photocurrent generations; Photovoltaic devices; Polymer photovoltaic devices; Polymer solar cells; Processing conditions; Solar illuminations; Transfer pathways; Weight ratios; Polymer films; butyric acid; ester; ester derivative; fullerene; poly[9,9' dioctyl fluorene co bithiophene]; polymer; solvent; unclassified drug; air; article; atomic force microscopy; cell; chemical structure; film; illumination; morphology; nanotechnology; performance; priority journal; processing; productivity; solar energy; temperature; temperature sensitivity; weight
Type
journal article