Recent advances of crosslinkable organic semiconductors in achieving solution-processed and stable optoelectronic devices

Abstract

High-efficiency optoelectronic devices have attracted extensive attention nowadays. Beside efficiency, cost and long-term stability are also crucial parameters for judging the performance and application of optoelectronic devices. To date, multilayer...

Rational strategy to enhance the thermal stability of solar cell performance using a photocrosslinkable conjugated polymer

“…27,28 To overcome this problem, applying crosslinkable materials to "freeze" the morphology of the active layer is an attractive strategy. 29,30 Crosslinking preserves the internal morphology of the active layer by stabilizing the initial morphology and limiting the aggregation and phase separation between the physically blended donor and acceptor materials in BHJ systems. Aer the active layer is treated to achieve the desired morphology by thermal or solvent vapor annealing, photo-or thermal crosslinking reactions are performed to immobilize the microstructure of the BHJ structure and prevent undesirable morphological changes over time.…”

“…27,28 To overcome this problem, applying crosslinkable materials to “freeze” the morphology of the active layer is an attractive strategy. 29,30…”

Alkyl fluorene-based cross-linkable hole transport materials with high triplet energy for high-efficiency solution-processed green PHOLEDs

“…12–16 This strategy forms insoluble polymer films only through chemical reaction and is more tolerant of solvents or molecular polarity than orthogonal solvent methods. 17,18 Wang et al 15 synthesized 4,4′-((1 E ,1′ E )-([1,1′-biphenyl]-4,4′-diylbis(9 H -carbazole-9,3-diyl))bis(ethene-2,1-diyl))bis( N -phenyl- N -(4-vinylphenyl)aniline) (V-TPAVCBP) using a vinyl cross-linking group and 4-octyloxydiphenyliodonium hexafluoroantimonate as the photoinitiator. The cross-linked V-TPAVCBP was endowed with a solvent resistance of 98% and rendered the resulting green PHOLED with a maximum current efficiency (CE max ) of 54.0 cd A −1 .…”

Azido‐Functionalized Fullerenes, Perylenediimide, Perylene, and Tetraphenylethylene as Crosslinkers for Applications in Materials Science

“…This method has proved to be particularly efficient by interlinking the polymer chains through covalent bonds, thus producing new polymers that present completely different physical as well as chemical properties. The principle of crosslinkable organic semiconductors (COSs) has been extended to use them in optoelectronic devices such as organic photovoltaics (OPVs), perovskite solar cells (PerSCs) and organic light‐emitting diodes (OLEDs) [20] . This powerful and low‐cost approach has been investigated to crosslink polymer and/or fullerene materials to stabilize the nanoscale morphology of bulk‐heterojunction (BHJ) organic solar cells (OSCs).…”

“…The principle of crosslinkable organic semiconductors (COSs) has been extended to use them in optoelectronic devices such as organic photovoltaics (OPVs), perovskite solar cells (PerSCs) and organic light-emitting diodes (OLEDs). [20] This powerful and low-cost approach has been investigated to crosslink polymer and/or fullerene materials to stabilize the nanoscale morphology of bulk-heterojunction (BHJ) organic solar cells (OSCs). This allows the control of the aggregation of fullerenes which tend to form crystallites in the active layer, resulting in a significant decrease in the long-term performance of OSCs.…”