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Advanced Materials Technologies · 2020 ·Vol. 5 ·期 6 ·2000099 · IF 5.969

Inkjet Printing Matrix Perovskite Quantum Dot Light-Emitting Devices

Danyang Li,Junjie Wang,Miaozi Li,Gancheng Xie,Biao Guo,Lan Mu,Haiyang Li,Jian Wang,Hin-Lap Yip,Junbiao Peng

Perovskite light emitting devices have been expected to be utilized in the field of displays. In this work, a stable FA 0.3 Cs 0.7 PbBr 3 perovskite quantum dot ink with optimized octane:dodecane cosolvent is obtained by introducing a trace amount of long-chain ligand of oleylamine (OAm) during the quantum dot purification process. A green electroluminescent matrix device with 120 pixels per inch (PPI) is realized from the ink by using an inkjet printing technique, exhibiting a luminance of 1233 cd m −2 , a peak current efficiency of 10.3 cd A −1 , and an external quantum efficiency of 2.8%. The results may suggest a possibility of making perovskite quantum dot displays by using the inkjet printing technique.

CAS / MDL: 534-17-8 3282-73-3 3473-63-0 112-90-3 112-80-1 14866-33-2

研究领域: 材料科学 · 显示技术

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Light-Science & Applications · 2025 ·Vol. 14 ·期 1 ·1-8 · IF 23.4

Photolithographic fabrication of high-resolution Micro-QLEDs towards color-conversion microdisplay

Jing Yuyu,Yao Mingyu,Yang Min,Li Menglin,Ding He,Yang Gaoling,Zhang Rongjian,Han Dengbao,Liu Huan,Zhong Haizheng

Microdisplay panels are critical components for metaverse technology. Aiming to achieve high-resolution and full-color microdisplay, we report the photolithographic fabrication of color-converted Micro-quantum dot light emitting diodes (QLED) panel by combining blue Micro-QLED electroluminescence (EL) device and red-green quantum dot color converter (QDCC). Pre-patterned templates were firstly photolithographically fabricated and then applied as substrate to fabricate patterned blue Micro-QLED device, achieving an ultra-high pixel resolution up to 6350 pixels per inch (pixel size ranging from 20 μm × 20 μm to 2 μm × 2 μm). Notably, the patterned blue devices achieve a peak external quantum efficiency (EQE) of 7.8% and a maximum brightness of 39,472 cd m −2 . The patterned red devices achieve a peak EQE of 18% and a maximum brightness of 103,022 cd m −2 . By integrating a dual-color red and green QDCC arrays on the top of the blue Micro-QLED, a prototype full-color Micro-QLED panel was fabricated, achieving a resolution up to 1184 pixels per inch with a peak EQE 4.8%, and a maximum brightness of 10 065 cd m −2 . The photolithographic fabrication of color-converted Micro-QLED provides an easy-operated method for achieving cost-effective microdisplay panels.

CAS / MDL: 1310-65-2 16674-78-5 5970-45-6 64-17-5 67-68-5

研究领域: 材料科学 · 纳米技术 · 光电子学 · 显示技术 · 半导体器件 · 薄膜工艺 · 微纳加工

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Inkjet Printing Matrix Perovskite Quantum Dot Light-Emitting Devices

Photolithographic fabrication of high-resolution Micro-QLEDs towards color-conversion microdisplay