Abstract
Combining two or more different compounds with advantageous properties has been a useful and straightforward strategy in achieving a new class of materials with improved physical properties. This has been especially true for electronic polymers, whose optoelectronic properties can be completely tuned, and even improved, when mixed with other polymeric materials, dye molecules and guest coordination compounds. Here, a light-emitting diode prepared with the conjugated polymer poly[(9,9-dioctylfluorenyl-2,7-diyl)-alt-co-(9,9-di-{5'-pentanyl}-fluorenyl-2,7-diyl)] (PFOFPen) as the host material and aquo[N,N'-bis(salicylidene)-o-phenylenediamine]zinc(II) ([Zn(salophen)(OH2)]) as the guest molecule was studied in terms of its photo and electroluminescence properties. The role of the ZnII coordination compound as a guest in the electroluminescence is discussed as a strategy for the improvement of the electroluminescence performance of coordination compounds using conjugated polymers as matrices. An additional advantage of these composites is that they are solution processable, a low-cost and time efficient alternative to vacuum vapor deposition. Additionally, the photophysical processes involved in both electroluminescence and photoluminescence emissions are discussed because they are markedly different.
Highlights
In the last two decades, great interest has been devoted to the preparation of novel organic electroluminescent materials
One corresponds to the pulse width, the other longer than the pulse, we are assuming that is the polymer lifetime. This was the lifetime that we are using in the calculation of the quenching efficiency
This work showed that polymers and coordination compounds are simple tools with which diodes can be prepared using a unique solution-based deposition
Summary
In the last two decades, great interest has been devoted to the preparation of novel organic electroluminescent materials. Conjugated polymers are normally deposited using wet techniques, such as spin-coating, rollto-roll, ink jet, and casting,[15,16,21] while organic molecules or coordination compounds are usually added by vacuum vapor evaporation.[22,23,24,25,26] The development of alternative techniques for material deposition to achieve good device performance is a goal of this research field, mainly where large-area devices are desired, being the subject of many present-day articles.[12,22] For instance, we recently demonstrated that a white-emitting diode can be obtained
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
