Effects of Bending Radii on the Characteristics of Flexible Organic Solar Cells Investigated by Impedance Analysis

Abstract

Flexible organic solar cells (OSCs) were fabricated on an indium-tin-oxide (ITO)/poly(ethylene terephthalate) (PET) substrate and were subjected to bending tests with various bending radii. We observed that the photovoltaic properties of the OSCs precipitously deteriorated at a bending radius ≤ 0.75 cm. In order to investigate the effects of the bending test, the changes in the surface morphology and the sheet resistance of the ITO-coated PET samples were investigated, and the photovoltaic properties of bent and unbent OSCs were evaluated. Thereafter, equivalent circuits for the OSCs were assumed and the change in their parameters, such as resistance and capacitance, was observed.

Nano Polimerik Tiyofenlerin Hazırlanması ve Yapılarının Karakterizasyonu

“…The most used organic materials for these applications were conductive polymers (ICPs) [1] such as polyaniline, polypyrrole (PPy) [2][3][4] and polythiophene (PTH) [5]. Among these polymers, polythiophene (PTH) has considerable attention due to the some characteristic properties such as high electrical [6] conductivity, environmental and thermal stability [7], oxidation and/or reduction levels, electrical and optical properties, high energy density, easy and low cost synthesis or potential application in various fields such as electromagnetic interference (EMI), polymer rechargeable batteries, DNA detection, organic light emitting diodes (OLEDs), photovoltaic cells [8], electrical memory performance, separation membranes, sensors [9], biomedical fields and so on [10][11][12][13][14][15][16][17][18][19][20].…”