Weber M, Adam M, Tykwinski R, Costa RD (2015)
Publication Type: Journal article
Publication year: 2015
Book Volume: 25
Pages Range: 5066-5074
Journal Issue: 31
This work demonstrates a novel proof-of-concept to implement pentacene derivatives as emitters for the third generation of light-emitting electrochemical cells based on small-molecules (SM-LECs). Here, a straightforward procedure is shown to control the chromaticity of pentacene-based lighting devices by means of a photoinduced cycloaddition process of the 6,13-bis(triisopropylsilylethynyl) (TIPS)-pentacene that leads to the formation of anthracene-core dimeric species featuring a high-energy emission. Without using the procedure, SM-LECs featuring deep-red emission with Commission Internationale d'Eclairage (CIE) coordinates of x = 0.69/y = 0.31 and irradiance of 0.4 \textgreekmW cm$-$2 are achieved. After a careful optimization of the cycloaddition process, warm white devices with CIE coordinates of x = 0.36/y = 0.38 and luminances of 10 cd m$-$2 are realized. Here, the mechanism of the device is explained as a host--guest system, in which the dimeric species acts as the high-energy band gap host and the low-energy bandgap TIPS-pentacene is the guest. To the best of the knowledge, this work shows the first warm white SM-LECs. Since this work is based on the archetypal TIPS-pentacene and the photoinduced cycloaddition process is well-knownfor any pentacenes, this proof-of-concept could open a new way to use these compounds for developing white lighting~sources.
APA:
Weber, M., Adam, M., Tykwinski, R., & Costa, R.D. (2015). Controlling the Chromaticity of Small-Molecule Light-Emitting Electrochemical Cells Based on TIPS-Pentacene. Advanced Functional Materials, 25(31), 5066-5074. https://dx.doi.org/10.1002/adfm.201501326
MLA:
Weber, Michael, et al. "Controlling the Chromaticity of Small-Molecule Light-Emitting Electrochemical Cells Based on TIPS-Pentacene." Advanced Functional Materials 25.31 (2015): 5066-5074.
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