What is it about?
We present, to the best of our knowledge, the first report on the fabrication of Pb-Free HP PeLEDs (i) through inkjet printing deposition of the active layer and (ii) on flexible substrates. PeLEDs based on 2D PEA2SnI4 (PEA, phenylethylammonium) have been fabricated by inkjet-printing technology, on both glass and polyimide (PI) flexible substrates, with red emission (λmax = 630 nm).
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Why is it important?
Device characterization experiments were performed under ambient conditions after a proper encapsulation, The electroluminescence (EL) spectral characteristics show that the light emitted by the first inkjet-printed PEA2SnI4 devices, with both SnF2 and NaBH4 additives, is red with a peak centered at 630 nm with fwhm of 25 nm.
Perspectives
The presented devices correspond, as far as we know, to the first demonstration of the viability of inkjet printing for the fabrication of lead-free PeLEDs, not only on rigid but also on flexible substrates. The exploitation of this technique ensures a future scalability in area and number of devices for mass production required in industry.
Giovanni Vescio
Universitat de Barcelona
Read the Original
This page is a summary of: 2D PEA2SnI4 Inkjet-Printed Halide Perovskite LEDs on Rigid and Flexible Substrates, ACS Energy Letters, September 2022, American Chemical Society (ACS),
DOI: 10.1021/acsenergylett.2c01773.
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