Description of the publication:

Authors:

A. Iwan, A. Sikora, V. Hamplová, A. Bubnov

Title:

AFM study of advanced composite materials for organic photovoltaic cells with active layer based on P3HT:PCBM and chiral photosensitive liquid crystalline dopants

Journal:

Liquid Crystals

Year:

2015

Vol:

42:7

Pages:

964-972

ISSN/ISBN:

0267-8292

DOI:

10.1080/02678292.2015.1011243

Link:

http://www.tandfonline.com/doi/full/10.1080/02678292.2015.1011243

Keywords:

AFM; chiral liquid crystal; organic solar cells; AZO compounds; photovoltaics

Abstract:

Advanced composite materials aimed for construction of organic photovoltaic cells have been studied by atomic force microscopy (AFM). The composites are based on poly(3-hexylthiophene) (P3HT), [6,6]-phenyl C61-butyric acid methyl ester (PCBM) and two different chiral photosensitive liquid crystalline (LC) materials. The objective 10 of the study was to examine the nanoscale morphology of the active layer without and after annealing at specific temperature. The preliminary results of AFM observation of the morphological changes done on the investigated composites revealed an increase in the surface ordering. The surface area ratio decreases for both studied composites, while the basic roughness parameters (Sa and Sq) have been found toughly dependent on the structure of the photosensitive LC dopant.

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Example figure:

3D view of the surface of the AZO sample.

Used methods:

TapppingMode