TY - JOUR
T1 - Efficient organic manganese(ii) bromide green-light-emitting diodes enabled by manipulating the hole and electron transport layer
AU - Jana, Atanu
AU - Sree, Vijaya Gopalan
AU - Ba, Qiankai
AU - Cho, Seong Chan
AU - Lee, Sang Uck
AU - Cho, Sangeun
AU - Jo, Yongcheol
AU - Meena, Abhishek
AU - Kim, Hyungsang
AU - Im, Hyunsik
N1 - Publisher Copyright:
© The Royal Society of Chemistry.
PY - 2021/9/14
Y1 - 2021/9/14
N2 - Lead-free, non-toxic transition metal-based phosphorescent organic-inorganic hybrid (OIH) compounds are promising for next-generation flat-panel displays and solid-state light-emitting devices. In the present study, we fabricate highly efficient phosphorescent green-light-emitting diodes (PHOLEDs) using the lead-free, non-toxic, zero-dimensional OIH compound [(H2CCHCH2)(C6H5)3P]2MnBr4 (1), which exhibits an emission peak at 516 nm and a long lifetime of 441 μs. The long lifetime indicates the phosphorescent emissive nature of 1. Density functional theory calculations confirm that the narrow green emission from 1 is due to the highly localized electronic states of the valence and conduction bands. A flexible green-light-emitting phosphorescent substrate is successfully fabricated from 1 using a nylon membrane, indicating that 1 has a significant potential for use in flexible optoelectronic devices. By engineering the organic hole and electron transport layers, we achieve a highly efficient all-vacuum-deposited PHOLED with a current efficiency of 24.71 cd A-1, a power efficiency of 20.61 lm W-1, and an external quantum efficiency of 7.12%. Together, our findings will pave the way for the development of high-performance Mn(ii)-based LEDs.
AB - Lead-free, non-toxic transition metal-based phosphorescent organic-inorganic hybrid (OIH) compounds are promising for next-generation flat-panel displays and solid-state light-emitting devices. In the present study, we fabricate highly efficient phosphorescent green-light-emitting diodes (PHOLEDs) using the lead-free, non-toxic, zero-dimensional OIH compound [(H2CCHCH2)(C6H5)3P]2MnBr4 (1), which exhibits an emission peak at 516 nm and a long lifetime of 441 μs. The long lifetime indicates the phosphorescent emissive nature of 1. Density functional theory calculations confirm that the narrow green emission from 1 is due to the highly localized electronic states of the valence and conduction bands. A flexible green-light-emitting phosphorescent substrate is successfully fabricated from 1 using a nylon membrane, indicating that 1 has a significant potential for use in flexible optoelectronic devices. By engineering the organic hole and electron transport layers, we achieve a highly efficient all-vacuum-deposited PHOLED with a current efficiency of 24.71 cd A-1, a power efficiency of 20.61 lm W-1, and an external quantum efficiency of 7.12%. Together, our findings will pave the way for the development of high-performance Mn(ii)-based LEDs.
UR - http://www.scopus.com/inward/record.url?scp=85114719381&partnerID=8YFLogxK
U2 - 10.1039/d1tc02550c
DO - 10.1039/d1tc02550c
M3 - Article
AN - SCOPUS:85114719381
SN - 2050-7526
VL - 9
SP - 11314
EP - 11323
JO - Journal of Materials Chemistry C
JF - Journal of Materials Chemistry C
IS - 34
ER -