Carbene metal amide photoemitters: tailoringconformationallyflexible amides for full colorrange emissions including white-emitting OLED
Files
Self archived version
published versionDate
2019Author(s)
Unique identifier
10.1039/c9sc04589aMetadata
Show full item recordMore information
Self-archived item
Citation
Romanov, Alexander S. Jones, Saul TE. Gu, Qinying. Conaghan, Patrick J. Drummond, Bluebell H. Feng, Jiale. Chotard, Florian. Buizza, Leonardo. Foley, Morgan. Linnolahti, Mikko. Credgington, Dan. Bochmann, Manfred. (2019). Carbene metal amide photoemitters: tailoringconformationallyflexible amides for full colorrange emissions including white-emitting OLED. Chemical science, 11 (2) , 435-446. 10.1039/c9sc04589a.Rights
Abstract
Conformationally flexible “Carbene–Metal–Amide” (CMA) complexes of copper and gold have been developed based on a combination of sterically hindered cyclic (alkyl)(amino)carbene (CAAC) and 6- and 7-ring heterocyclic amide ligands. These complexes show photoemissions across the visible spectrum with PL quantum yields of up to 89% in solution and 83% in host-guest films. Single crystal X-ray diffraction and photoluminescence (PL) studies combined with DFT calculations indicate the important role of ring structure and conformational flexibility of the amide ligands. Time-resolved PL shows efficient delayed emission with sub-microsecond to microsecond excited state lifetimes at room temperature, with radiative rates exceeding 106 s−1. Yellow organic light-emitting diodes (OLEDs) based on a 7-ring gold amide were fabricated by thermal vapor deposition, while the sky-blue to warm-white mechanochromic behavior of the gold phenothiazine-5,5-dioxide complex enabled fabrication of the first CMA-based white light-emitting OLED.