Dynamic doping and degradation in sandwich-type light-emitting electrochemical cells.

Half‐Gate Light‐Emitting Electrochemical Transistor to Achieve Centered Emissive Organic p‐n Junction

Organic light-emitting electrochemical cells (LEC) are promising for lighting applications but in many cases these devices suffer from unbalanced electrochemical doping, which cause instability and degradation of the cells. A predominant p-doping over n-doping causes an off-centered emissive p-n junction, which leads to poor powerconversion efficiency. Here, we report a half-gate LEC transistor...

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

Time-Resolved Chemical Mapping in Light-Emitting Electrochemical Cells.

An understanding of the doping and ion distributions in light-emitting electrochemical cells (LECs) is required to approach a realistic conduction model which can precisely explain the electrochemical reactions, p-n junction formation, and ion dynamics in the active layer and to provide relevant information about LECs for systematic improvement of function and manufacture. Here, Fourier-transfo...

Small-molecule light-emitting electrochemical cells: evidence for in situ electrochemical doping and functional operation.

We demonstrate that non-ionic small molecules (SMs) can function as the doping and emissive compound in light-emitting electrochemical cells (LECs), and that high brightness and decent efficiency can be attained for such devices. It is plausible that the expansion of the LEC library, to include easy-to-purify and tunable non-ionic SM compounds, could represent a viable path towards improved LEC...

Polymer Light-Emitting Electrochemical Cells Utilizing Doping for Generation of Light