A red emissive poly(dendrimer) comprised of a norbornenyl-derived polymer backbone with a phosphorescent dendrimer side chain has been prepared by a ring opening methathesis polymerisation with a number average molecular weight of 164 kDa and a dispersity of 2.4. The dendrimer side chain has a heteroleptic iridium(III) complex core containing two 2-phenylpyridyl ligands and one 2-(thiophen-2-yl)quinoline ligand. The 2-phenylpyridyl ligands had first generation fluorenylcarbazole dendrons with n-propyl surface groups attached and the 2-(thiophen-2-yl)quinoline ligand was linked directly to the polymer backbone. In spite of the presence of the two 2-phenylpyridine ligands that would normally give rise to green emission when complexed with iridium(III) the 2-(thiophen-2-yl)quinoline was responsible for the saturated red emission with CIE coordinates of (0.67, 0.33). The poly(dendrimer) had a high photoluminescence quantum yield (PLQY) for a red emissive species at 72 ± 7%, which was maintained when blended with 4,4′-bis(carbazol-9-yl)biphenyl (CBP) at a concentration of 10 wt % (PLQY = 74 ± 8%). Simple two-layer devices containing the blend emissive layer and an electron transporting hole blocking layer had a maximum external quantum efficiency of almost 11%.

通过数均分子量为164kDa，分散度为2.4的开环复分解聚合反应，制备了由降冰片烯基衍生的聚合物主链和磷光性树枝状聚合物侧链组成的红色发光聚（树枝状聚合物）。树枝状大分子侧链具有含有两个2-苯基吡啶基配体和一个2-（噻吩-2-基）喹啉配体的杂铱（III）络合物核心。2-苯基吡啶基配体具有第一代芴基咔唑树枝状分子，其中n连接的-丙基表面基团和2-（噻吩-2-基）喹啉配体直接连接到聚合物主链上。尽管存在两个2-苯基吡啶配体，当它们与铱（III）络合时通常会发出绿色光，但是2-（噻吩-2-基）喹啉仍负责饱和红色发射，其CIE坐标为（ 0.67、0.33）。聚树状聚合物对红色发射物质具有72±7％的高光致发光量子产率（PLQY），当与4,4'-双（咔唑-9-基）联苯（CBP）混合时，该值保持不变。浓度为10 wt％（PLQY = 74±8％）。包含共混物发射层和电子传输空穴阻挡层的简单两层器件的最大外部量子效率几乎为11％。