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White Light‐Emitting Electrochemical Cells Based on Deep‐Red Cu(I) Complexes
Author(s) -
Fresta Elisa,
Weber Michael D.,
FernandezCestau Julio,
Costa Rubén D.
Publication year - 2019
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201900830
Subject(s) - electrochemistry , materials science , copper , color rendering index , xantphos , electroluminescence , electrochemical cell , photoluminescence , white light , optoelectronics , chemistry , nanotechnology , electrode , organic chemistry , palladium , layer (electronics) , metallurgy , catalysis
The synthesis and characterization, as well as photoluminescent and electrochemical features of a series of ionic copper(I) complexes—, i.e., [Cu(N ^ N)(P ^ P)] + , where N ^ N is 4,4′‐diethylester‐2,2′‐biquinoline (dcbq) and P ^ P is bis‐triphenylphosphine, bis[2‐(diphenylphosphino)phenyl)ether] (POP), or 4,5‐bis(diphenylphosphino)‐9,9‐dimethylxanthene (Xantphos)—are reported along with their application to achieve both deep‐red and white light‐emitting electrochemical cells (LECs). In short, the first deep‐red Cu(I)‐based LECs featuring high irradiances (≈100 µW cm −2 ) and excellent color stability ( x/y CIE color coordinates of 0.66/0.32) over days are reported. This is achieved by comparing the electroluminescent behavior of this series of complexes with respect to the irradiance and stability, as well as the impact of introducing supporting electrolytes on the device performance. This is rationalized using spectroscopic and electrochemical studies. Finally, the first white‐emitting LEC is manufactured with red‐emitting copper(I) complexes, achieving x/y CIE color coordinates of 0.31/0.32 and a high color rendering index of 92.