Optical-Beam-Induced-Current Imaging of Planar Polymer Light-Emitting Electrochemical Cells

Recombination profiles in poly†2-methoxy-5-„2-ethylhexyloxy...-1,4- phenylenevinylene‡ light-emitting electrochemical cells

We present a study on the optical and electronic properties of light-emitting electrochemical cells LECs based on poly 2-methoxy-52-ethylhexyloxy -1,4-phenylenevinylene MEH-PPV with the goal of understanding emission profiles and characterizing salt and electrode dependence. Direct imaging of photoluminescence and electroluminescence profiles of planar LECs and simulations of optical interferen...

Biodegradable Polycaprolactone as Ion Solvating Polymer for Solution-Processed Light-Emitting Electrochemical Cells

In this work, we demonstrate the use of the biodegradable polymer polycaprolactone (PCL) as the ion solvating polymer in solution-processed light-emitting electrochemical cells (LEC). We show that the inclusion of PCL in the active layer yields higher ionic conductivities and thus contributes to a rapid formation of the dynamic p-i-n junction and reduction of operating voltages. PCL shows no ph...

Electrochemical doping during light emission in polymer light-emitting electrochemical cells

Optical Characterization and Properties of Polymeric Materials for Optoelectronic and Photonic Applications

The optical properties of polymers attract considerable attention because of their potential optoelectronic applications, such as in polymer-based light-emitting diodes, light electrochemical cells, and solar cells. To optimize the performance of optoelectronic and photonic devices, some polymers are modified through the introduction of specific end groups, copolymerization, grafting, crosslink...

Improvement of light harvesting by inserting an optical spacer (ZnO) in polymer bulk heterojunction solar cells: A theoretical and experimental study

By introducing a thin ZnO layer as an optical spacer, we have demonstrated that inserting this layer between an active layer and a reflective electrode results in a re-distribution of the optical electric field inside bulk heterojunction solar cells. A theoretical analysis by optical modeling showed that the thin ZnO layer could shift the position of the maximum of the electric field into the a...