Correlation between surface photovoltage and blend morphology in polyfluorene-based photodiodes.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 15826087.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
Abstract
We present a microscopic study of photoinduced charge generation in polyfluorene-based photovoltaic structures. The sub-100 nm lateral resolution of scanning Kelvin probe microscopy allows characterizing the three-dimensional structure of thin films of blends of poly-(9,9'-dioctylfluorene-co-benzothiadiazole) (F8BT) and poly-(9,9'-dioctylfluorene-co-bis-N,N'-(4-butylphenyl)-bis-N,N'-phenyl-1,4-phenylenediamine) (PFB). From the strong correlation between surface photovoltage and blend morphology, we propose a simple model for the lateral and vertical film structure identifying in particular those regions with the most efficient conduction pathway for the photocurrent.