TY - JOUR
T1 - Mesoscopic fully printable perovskite light-emitting diodes in the near infra-red region
AU - Sohmer-Tal, Maayan
AU - Etgar, Lioz
N1 - Publisher Copyright:
© 2024 The Royal Society of Chemistry.
PY - 2024
Y1 - 2024
N2 - This study presents, for the first time, a fully printable mesoporous indium tin oxide (ITO) perovskite light-emitting diode (ITO-PeLED). The structure comprises triple-oxide screen-printed mesoporous layers, with the perovskite filling the pores of the inorganic framework. These ITO-PeLEDs emit in the near-infrared region achieving an external quantum efficiency (EQE) of 22.07% and a peak radiance of approximately 1000 W sr−1 m−2. Additionally, they can function as solar cells, exhibiting over 10% efficiency, where the perovskite serves as both a light harvester and a hole conductor simultaneously. Further analysis reveals that the dominant recombination mechanism in these ITO-PeLEDs is Shockley-Read-Hall recombination in the bulk, while a significant energy mismatch between the layers leads to considerable Voc loss, impacting device functionality. Impedance spectroscopy was employed to investigate the electroluminescence process across different voltage ranges, revealing a correlation between ion current and electroluminescence and emphasizing the critical role of ion migration in radiative recombination. This phenomenon is supported by the improved performance of ITO-PeLEDs observed during stability measurements conducted over multiple cycles. This work demonstrates efficient and fully printable PeLEDs that are suitable for large-scale production.
AB - This study presents, for the first time, a fully printable mesoporous indium tin oxide (ITO) perovskite light-emitting diode (ITO-PeLED). The structure comprises triple-oxide screen-printed mesoporous layers, with the perovskite filling the pores of the inorganic framework. These ITO-PeLEDs emit in the near-infrared region achieving an external quantum efficiency (EQE) of 22.07% and a peak radiance of approximately 1000 W sr−1 m−2. Additionally, they can function as solar cells, exhibiting over 10% efficiency, where the perovskite serves as both a light harvester and a hole conductor simultaneously. Further analysis reveals that the dominant recombination mechanism in these ITO-PeLEDs is Shockley-Read-Hall recombination in the bulk, while a significant energy mismatch between the layers leads to considerable Voc loss, impacting device functionality. Impedance spectroscopy was employed to investigate the electroluminescence process across different voltage ranges, revealing a correlation between ion current and electroluminescence and emphasizing the critical role of ion migration in radiative recombination. This phenomenon is supported by the improved performance of ITO-PeLEDs observed during stability measurements conducted over multiple cycles. This work demonstrates efficient and fully printable PeLEDs that are suitable for large-scale production.
UR - http://www.scopus.com/inward/record.url?scp=85204201306&partnerID=8YFLogxK
U2 - 10.1039/d4tc02355b
DO - 10.1039/d4tc02355b
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:85204201306
SN - 2050-7526
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
ER -