AI Article Synopsis
- Researchers developed printed organometal halide perovskite LEDs using indium tin oxide (ITO) or carbon nanotubes (CNTs) as transparent anodes, with a composite film of methylammonium lead tribromide (Br-Pero) and poly(ethylene oxide) (PEO) as the emissive layer.
- The devices exhibited a low turn-on voltage of 2.6 V, a peak luminance of 21,014 cd m(-2), and an external quantum efficiency (EQE) of 1.1%, outperforming prior models.
- Additionally, LEDs on CNTs/polymer showed remarkable flexibility, maintaining performance even when bent to a 5 mm radius of curvature.
Article Abstract
Printed organometal halide perovskite light-emitting diodes (LEDs) are reported that have indium tin oxide (ITO) or carbon nanotubes (CNTs) as the transparent anode, a printed composite film consisting of methylammonium lead tribromide (Br-Pero) and poly(ethylene oxide) (PEO) as the emissive layer, and printed silver nanowires as the cathode. The fabrication can be carried out in ambient air without humidity control. The devices on ITO/glass have a low turn-on voltage of 2.6 V, a maximum luminance intensity of 21014 cd m(-2), and a maximum external quantum efficiency (EQE) of 1.1%, surpassing previous reported perovskite LEDs. The devices on CNTs/polymer were able to be strained to 5 mm radius of curvature without affecting device properties.
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| http://dx.doi.org/10.1021/acsnano.5b07506 | DOI Listing |
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