N-2-Aryl-1,2,3-triazoles: A Novel Class of UV/Blue-Light-Emitting Fluorophores with Tunable Optical Properties

2011 ◽  
Vol 17 (18) ◽  
pp. 5011-5018 ◽  
Author(s):  
Wuming Yan ◽  
Qiaoyi Wang ◽  
Quan Lin ◽  
Minyong Li ◽  
Jeffrey L. Petersen ◽  
...  
Keyword(s):  
Optical Properties ◽  
Blue Light ◽  
Light Emitting ◽  
Tunable Optical Properties

Synthesis, optical properties and crystal structures of carbazole end-capped phenylene ethynylene blue light-emitting materials

2010 ◽  
Vol 130 (7) ◽  
pp. 1183-1188 ◽  
Author(s):  
Rui Liu ◽  
Hongjun Zhu ◽  
Jin Chang ◽  
Qi Xiao ◽  
Yuhao Li ◽  
...  
Keyword(s):  
Optical Properties ◽  
Crystal Structures ◽  
Blue Light ◽  
Phenylene Ethynylene ◽  
Light Emitting

Tuning optical properties of CsPbBr3 by mixing Nd3+trivalent lanthanide halide cations for blue light emitting devices.

2022 ◽  
Author(s):  
Muhammad Amin Padhiar ◽  
Minqiang Wang ◽  
Yongqiang Ji ◽  
Zhi Yang ◽  
Arshad Saleem Bhatti
Keyword(s):  
Optical Properties ◽  
Blue Light ◽  
Light Emission ◽  
Low Cost ◽  
Thermal Quenching ◽  
Visible Spectrum ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Lanthanide Halide ◽  
Trivalent Lanthanide

Abstract In recent years, significant progress has been made in the red and green perovskite quantum dots (PQDs) based light-emitting devices. However, a scarcity of blue-emitting devices that are extremely efficient precludes their research and development for optoelectronic applications. Taking advantage of tunable bandgaps of PQDs over the entire visible spectrum, herein we tune optical properties of CSPbBr3 by mixing Nd3+ trivalent lanthanide halide cations for blue light-emitting devices. The CsPbBr3 PQDs doped with Nd3+ trivalent lanthanide halide cations emitted strong photoemission from green into the blue region. By adjusting their doping concentration, a tunable wavelength from (515 nm) to (450 nm) was achieved with FWHM from (37.83 nm) to (16.6 nm). We simultaneously observed PL linewidth broadening thermal quenching of PL and the blue shift of the optical bandgap from temperature-dependent PL studies. The Nd3+ cations into CsPbBr3 PQDs more efficiently reduced non-radiative recombination. As a result of the efficient removal of defects from PQDs, the photoluminescence quantum yield (PLQY) has been significantly increased to 91% in the blue-emitting region. Significantly, Nd3+ PQDs exhibit excellent long-term stability against the external environment, including water, temperature, and ultraviolet light irradiation. Moreover, we successfully transformed Nd3+ doped PQDs into highly fluorescent nanocomposites. Incorporating these findings, we fabricate and test a stable blue light-emitting LED with EL emission at (462 nm), (475 nm), and successfully produce white light emission from Nd3+ doped nanocomposites with a CIE at (0.32, 0.34), respectively. The findings imply that low-cost Nd3+ doped perovskites may be attractive as light converters in LCDs with a broad color gamut.

Optical Properties of Blue-Light-Emitting (Ca,Sr)Mg2Si3O9:Eu2+Phosphor

2010 ◽  
Vol 49 (10) ◽  
pp. 102101 ◽  
Author(s):  
Hyun Ju Lee ◽  
Sung Hwan Choi ◽  
Kyung Pil Kim ◽  
Hyun Ho Shin ◽  
Jae Soo Yoo
Keyword(s):  
Optical Properties ◽  
Blue Light ◽  
Light Emitting

Structural and linear optical properties of blue light emitting Sr3Al2O6

2020 ◽  
Author(s):  
Neenu Mary Thomas ◽  
V. G. Sreeja ◽  
Ison V. Vanchipurackal ◽  
E. I. Anila
Keyword(s):  
Optical Properties ◽  
Blue Light ◽  
Light Emitting ◽  
Linear Optical Properties ◽  
Linear Optical

scholarly journals Phosphine-Free-Synthesized ZnSe/ZnS Core/Shell Quantum Dots for White Light-Emitting Diodes

2021 ◽  
Vol 11 (21) ◽  
pp. 10060
Author(s):  
Nyamsuren Byambasuren ◽  
Jiyeon Jo ◽  
Hyungduk Ko ◽  
Byeong-Kwon Ju ◽  
Ji Young Byun ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Optical Properties ◽  
Blue Light ◽  
White Light ◽  
Light Emitting Diodes ◽  
Core Shell ◽  
Light Emitting ◽  
White Leds ◽  
Deep Blue ◽  
Near Ultraviolet

Blue-light-emitting ZnSe core (C) and ZnSe/ZnS core/shell (C/S) quantum dots (QDs) were synthesized with phosphine-free precursors by a thermal decomposition method in paraffin oil solvent and applied to QD-converted light-emitting diodes (LEDs). The optical properties of the synthesized ZnSe C and ZnSe/ZnS C/S QDs were characterized by absorption spectroscopy and photoluminescence spectroscopy. Additionally, the quantum efficiency of the QDs was investigated. Their structural properties were studied with X-ray crystallography and transmission electron microscopy. The ZnSe/ZnS C/S QDs showed deep-blue light peaking at 425 nm. The blue-light-emitting ZnSe/ZnS C/S QDs were used as color-converting materials for near-ultraviolet LED-pumped blue LEDs and combined with yellow-light-emitting Zn-Cu-In-S/ZnS C/S QDs to fabricate white LEDs. The white LEDs showed warm white light [(CIE x, CIE y) = (0.4088, 0.3987)], Tc = 3488 K, and Ra = 61.2]. The results indicate that the ZnSe/ZnS C/S QDs have good potential for white light application after further improvements to their optical properties.

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