Journal
ADVANCED MATERIALS
Volume -, Issue -, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202302059
Keywords
blue emission; displays; high efficiency; light-emitting diodes; perovskites
Ask authors/readers for more resources
The performance of blue Perovskite light-emitting diodes (PeLEDs) has been significantly improved by introducing a multi-functional chiral ligand, which can passivate defects, modulate phase distribution, enhance photoluminescence quantum yield, improve film morphology, and enhance charge transport. Additionally, ladder-like hole transport layers have been established, boosting charge injection and balance. As a result, sky-blue PeLEDs with high external quantum efficiency and power efficiency have been achieved.
Perovskite light-emitting diodes (PeLEDs) emerge as a promising class of optoelectronic devices for next-generation displays and lighting technology. However, the performance of blue PeLEDs lags far behind that of their green and red counterparts, including the unachieved trade-off between high efficiency and high luminance, severe efficiency roll-off, and unsatisfactory power efficiency. Here, a multi-functional chiral ligand of L-phenylalanine methyl ester hydrochloride is strategically introduced into quasi-2D perovskites, which can effectively passivate defects, modulate the phase distribution, improve photoluminescence quantum yield, guarantee high-quality film morphology, and enhance charge transport. Furthermore, ladder-like hole transport layers are established, boosting charge injection and balance. The resultant sky-blue PeLEDs (the photoluminescence peak is 493 nm and the electroluminescence peak is 497 nm) exhibit an external quantum efficiency of 12.43% at 1000 cd m(-2) and a record power efficiency of 18.42 lm W-1, rendering that the performance is among the best blue PeLEDs.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available