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Flexible green perovskite light emitting diodes
journal contribution
posted on 2023-06-09, 18:09 authored by Giuseppe Cantarella, Sudhir Kumar, Christian Vogt, Stefan Knobelspies, Alain Takabayashi, Jakub Jagielski, Niko Munzenrieder, Alwin Daus, Luisa Petti, Giovanni A Salvatore, Paolo Lugli, Chih-Jen Shih, Gerard TrösterFlexible perovskite light-emitting diodes (LEDs) have attracted increasing interest to realize ultrathin, light weight, highly conformable and nonfragile vivid displays. Solution-processed lead halide perovskite offers numerous distinctive characteristics such as pure emission color, tunable bandgaps, and low fabrication cost. In this work, green perovskite LEDs (PeLEDs) are fabricated on 50 µm thick polyimide substrates. Using colloidal 2D formamidinium lead bromide perovskite emitter, the PeLEDs show a high current efficiency (?CE) of 5.3 cd A-1 with a peak emission at 529 ± 1 nm and a narrow width of 22.8 nm. The resultant green emission shows color saturation > 95%, in the Rec. 2020 standard gamut area. To demonstrate mechanical flexibility, the device functionality is tested by dynamic bending experiments down to 10 mm for up to 5000 cycles, resulting in device lifetime over 36 h in a glove box and a drop of ?CE and external quantum efficiency (?ext) as low as 15% and 18%, respectively. For the selective activation of multiple PeLEDs, 7 × 7 passive arrays on rigid and flexible substrates are demonstrated. Moreover, preliminary results of active matrices show the compatibility of PeLEDs with oxide-based Thin-Film Transistors (TFTs) for display applications.
History
Publication status
- Published
File Version
- Accepted version
Journal
IEEE Journal of the Electron Devices SocietyISSN
2168-6734Publisher
Institute of Electrical and Electronics EngineersExternal DOI
Department affiliated with
- Engineering and Design Publications
Research groups affiliated with
- Sensor Technology Research Centre Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2019-06-24First Open Access (FOA) Date
2019-06-24First Compliant Deposit (FCD) Date
2019-06-24Usage metrics
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