Abstract
Abstract Organic photovoltaic (OPV) cells are considered as a viable alternative to those energy sources currently in use. In this work three derivatives of original N,N’- dimetilaminobenziliden-1,3-indandione (DMABI) material are presented as potential materials for OPV. The photoconductivity threshold energy was evaluated from the perspective of spectral dependence of photoconductivity quantum efficiency, and the optical energy gap was defined to determine the optical absorption spectra. The absorption spectra of derivatives are blue shifted compared to original DMABI. Use of these derivatives in multilayer solar cells with original DMABI makes it possible to broaden the spectral response range of OPV.
Highlights
Renewable and clean energy is a challenge in present-day society
A wider energy gap influences the efficiency of a solar cell by increasing open circuit voltage
The experiments showed that the acquisition of absorption spectra of compounds that tend to make polycrystalline thin films could be difficult because of their polycrystalline structure
Summary
Renewable and clean energy is a challenge in present-day society. new energy sources are necessary to bring cheap and easy solutions into the market. The selection of materials is one of the options for OPV improvement as a wide range of organic materials can be used to broaden the spectral response range of OPV by using materials for which the absorption spectral region is different. This is one option for improving the efficiency of OPV cells[11, 12]. Charge carrier generation is influenced by an energy gap of material Eg which is common with the ionization potential of material in its solid state This is an important parameter to create an energy level diagram for the solar cell [13, 14]. The maximum absorption capacities of the chosen derivatives are blue shifted compared to the DMABI and some other DMABI derivatives [15, 16]
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