Synthesis and properties of hyperbranched polymers for white polymer light-emitting diodes

Li, Xuefeng; Zhao, Haixia; Gao, Long; Xie, Xiaolin; Zhang, Weixuan; Wang, Mixue; Wu, Yuling; Miao, Yanqin; Wang, Hua; Xu, Bingshe

doi:10.1039/c9ra07371j

Cited by 6 publications

(2 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Li et al . reported a series of HBPs ( HBP20‐23 ) for OLED devices with 3D SDF as the core, fluorene as branches, and iridium 1‐(4‐bromophenyl)‐isoquinoline (acetylacetone) (Ir(Brpiq) 2 acac) as the dimming group [16f] . As depicted in Scheme 3d, the OLED devices were prepared using HBP20‐23 to achieve good white light emission with a maximum luminance of 6210 cd/m 2 for HBP22 and current efficiency of 6.3 cd/A for HBP23 .…”

Section: Development Of Hbps In Oledsmentioning

confidence: 99%

Hyperbranched Polymers for Organic Semiconductors

et al. 2023

View full text Add to dashboard Cite

Hyperbranched polymers (HBPs) have attracted increasing attention owing to their distinct highly branched topological structures, resulting in unique properties and wide applications in organic semiconductors (OSCs). In this Review, recent progress in functional HBPs is outlined in the field of OSCs, including organic light‐emitting diodes (OLEDs), organic photovoltaics (OPVs), dye‐sensitized solar cells (DSSCs), and organic field effect transistors (OFETs), among others. Prospects of HBPs‐based materials in OSCs are examined. The results revealed that multi‐dimensional topologies not only regulate the electron (hole) transport but also adjust the film morphology, thereby affecting the efficiency and long life of organic electronic devices. Many studies showed the usefulness of HBPs as hole transport materials but reports dealing with n‐type and ambipolar materials are still lacking. In addition, the interchain covalent bond in hyperbranched polymers could mitigate the damage caused by stretching, conducive to building stable flexible stretchable devices with long‐term durability and good safety under harsh environmental conditions. Overall, the flexible stretchable design may enrich the applications of HBPs in organic semiconductors and provide new ideas for guiding the future design of functional organic semiconductor materials.

show abstract

Section: Development Of Hbps In Oledsmentioning

confidence: 99%

Hyperbranched Polymers for Organic Semiconductors

et al. 2023

View full text Add to dashboard Cite

show abstract

“…[18] Herein we propose and explore such a kind of spatially structured acceptor polymers-branched 𝜋-conjugated polymers (BCPs) that intend to effectively tackle the above-mentioned morphological issues. BCPs featuring 3D architectures differ from their conventional linear counterparts, [19] in that BCPs are intrinsically stretched in all directions and hence tend to form globular structures and provide large internal space and high-density end-chains, [20,21] both of which guarantee the sufficient contacts with donor polymers, in particular those linear ones. Moreover, BCPs can effectively mitigate the entanglements and aggregation among polymer chains, ensuring good solubility in organic solvents and holding good promise on high-M.W.…”

Section: Introductionmentioning

confidence: 99%

Developing Y‐Branched Polymer Acceptor with 3D Architecture to Reconcile Between Crystallinity and Miscibility Yielding >15% Efficient All‐Polymer Solar Cells

Zhu

Xiong

et al. 2022

Advanced Science

View full text Add to dashboard Cite

In all-polymer solar cells (all-PSCs), there remains such a dilemma that obtains good miscibility and crystallinity simultaneously. Herein a new family of Y-shape polymer acceptor, namely PYTT is developed, which is copolymerized from Y6 and benzotrithiophene units in three-way directions. Benefiting from its high-density end-chains and extended 𝝅-conjugation thanks to highly-branched 3D architecture, PYTT displays better organic solubility despite much higher molecular weights, larger crystallinity, and tighter 𝝅-stacking than the linear counterpart-PYT comprising Y6 and thiophene moieties, while showing identical optical absorption yet threefold higher photoluminescence intensity. In PYTT blend film with PM6 polymer donor, the interpenetrating nano-fibrillar structures are formed with well-intermixed polymeric domain sizes close to the exciton diffusion length, which is greatly conducive to exciton dissociation and charge transport in device. Consequently, PYTT-based all-PSCs exhibit all increased photovoltaic parameters, yielding a decent power conversion efficiency of 15.60%, which is ≈20% enhancement over PYT-based device, along with low nonradiative loss of 0.221 meV.

show abstract

Electrical Uses

2020

The Chemistry of Environmental Engineering

View full text Add to dashboard Cite

Synthesis and properties of hyperbranched polymers for white polymer light-emitting diodes

Abstract: A potential hyperbranched structure with fluorene-alt-carbazole branches, a three-dimensional-structured SDF core and red Ir(piq)2acac light adjusting units is synthesized for using in highly efficient white polymer light-emitting devices.

Cited by 6 publications

References 36 publications

Hyperbranched Polymers for Organic Semiconductors

Hyperbranched Polymers for Organic Semiconductors

Developing Y‐Branched Polymer Acceptor with 3D Architecture to Reconcile Between Crystallinity and Miscibility Yielding >15% Efficient All‐Polymer Solar Cells

Electrical Uses

Contact Info

Product

Resources

About