title: Induction of Strong Long-Lived Room-Temperature Phosphorescence of N-Phenyl-2-naphthylamine Molecules by Confinement in a Crystalline Dibromobiphenyl Matrix.
abstract: The design and preparation of metal-free organic materials that exhibit room-temperature phosphorescence (RTP) is a very attractive topic owing to potential applications in organic optoelectronic devices. Herein, we present a facile approach to efficient and long-lived organic RTP involving the doping of N-phenylnaphthalen-2-amine (PNA) or its derivatives into a crystalline 4,4'-dibromobiphenyl (DBBP) matrix. The resulting materials showed strong and persistent RTP emission with a quantum efficiency of approximately 20 % and a lifetime of a few to more than 100 milliseconds. Bright white dual emission containing blue fluorescence and yellowish-green RTP from the PNA-doped DBBP crystals was also confirmed by Commission Internationale de l'Eclairage (CIE) coordinates of (x=0.29-0.31, y=0.38-0.41).
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 2699 Qianjin Avenue, Changchun, 130012, P.R. China.
authors.forename: Jinbei
authors.initials: J
authors.lastname: Wei
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 2699 Qianjin Avenue, Changchun, 130012, P.R. China.
authors.forename: Baoyan
authors.initials: B
authors.lastname: Liang
authors.affiliation: Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
authors.forename: Ruihong
authors.initials: R
authors.lastname: Duan
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 2699 Qianjin Avenue, Changchun, 130012, P.R. China.
authors.forename: Zong
authors.initials: Z
authors.lastname: Cheng
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 2699 Qianjin Avenue, Changchun, 130012, P.R. China.
authors.forename: Chenglong
authors.initials: C
authors.lastname: Li
authors.affiliation: Kaneka US Material Research Center (KMR), Kaneka Americas Holding, Inc., 800 Raymond Stotzer Pkwy, Suite 2105, College Station, TX, 77843, USA.
authors.forename: Tianlei
authors.initials: T
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
authors.forename: Yuanping
authors.initials: Y
authors.lastname: Yi
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 2699 Qianjin Avenue, Changchun, 130012, P.R. China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Wang
keywords: intersystem crossing; materials science; matrix isolation; room-temperature phosphorescence; white-light emission