TY - JOUR
T1 - Stairstep Cu4I4 cluster with n-butyldimethylsilyl thiophenyl triphosphine
T2 - Structure and photophysical properties
AU - Yang, Han
AU - Zhu, Ruiqin
AU - Liu, Li
AU - Zhong, Xin Xin
AU - Li, Fa Bao
AU - Zhou, Guijiang
AU - Qin, Hai Mei
N1 - Publisher Copyright:
© 2026
PY - 2026/5
Y1 - 2026/5
N2 - Highly efficient OLEDs fabricated with mononuclear Cu(I) halide complexes containing rigid aryl triphosphine ligands have attracted much attention. However, there are no reports on copper halide clusters containing rigid triphosphine ligands. Here, one rigid triphosphine ligand L1 and one tetranuclear copper(I) iodide stairstep cluster 1 [Cu4I4(L1)2, L1 = (2-PPh2-5-Si(n-Bu)Me2-C4HS)2 (3-PPh)], were successfully synthesized. At room temperature, cluster 1 in powder emits yellow green delayed fluorescence (λem = 554 nm, τ = 4.9 μs, Φ = 0.25), and at 77 K, it emits yellow green phosphorescence (λem = 543 nm, τ = 104 μs). Based on the TDDFT calculations, the emission of cluster 1 mainly originates from metal-to-ligand charge transfer (MLCT) and halogen-to-ligand charge transfer (XLCT). Cluster 1 shows good thermal stability with the onset decomposition temperature (Tdec) of 421 °C. Cluster 1-based solution-processed devices exhibit greenish yellow light with the highest EQE of 2.30% and the maximum luminance of 1661 cd m−2.
AB - Highly efficient OLEDs fabricated with mononuclear Cu(I) halide complexes containing rigid aryl triphosphine ligands have attracted much attention. However, there are no reports on copper halide clusters containing rigid triphosphine ligands. Here, one rigid triphosphine ligand L1 and one tetranuclear copper(I) iodide stairstep cluster 1 [Cu4I4(L1)2, L1 = (2-PPh2-5-Si(n-Bu)Me2-C4HS)2 (3-PPh)], were successfully synthesized. At room temperature, cluster 1 in powder emits yellow green delayed fluorescence (λem = 554 nm, τ = 4.9 μs, Φ = 0.25), and at 77 K, it emits yellow green phosphorescence (λem = 543 nm, τ = 104 μs). Based on the TDDFT calculations, the emission of cluster 1 mainly originates from metal-to-ligand charge transfer (MLCT) and halogen-to-ligand charge transfer (XLCT). Cluster 1 shows good thermal stability with the onset decomposition temperature (Tdec) of 421 °C. Cluster 1-based solution-processed devices exhibit greenish yellow light with the highest EQE of 2.30% and the maximum luminance of 1661 cd m−2.
UR - https://www.scopus.com/pages/publications/105029590869
U2 - 10.1016/j.jlumin.2026.121789
DO - 10.1016/j.jlumin.2026.121789
M3 - 文章
AN - SCOPUS:105029590869
SN - 0022-2313
VL - 293
JO - Journal of Luminescence
JF - Journal of Luminescence
M1 - 121789
ER -