Publications by authors named "Jiahuan Feng"
High-Resolution Quantum Dot Light-Emitting Diodes by Electrohydrodynamic Printing.
ACS Appl Mater Interfaces
February 2024
Article Synopsis
- Quantum dot light-emitting diodes (QLEDs) are gaining popularity for their great light-emitting properties and ability to be manufactured using inkjet printing, but their low resolution limits their use in display applications.
- Researchers improved QLED resolution to 2540 pixels per inch (PPI) by using electrohydrodynamic (EHD) printing, achieving a maximum external quantum efficiency (EQE) of 20.29% and brightness of 35816 cd/m².
- The study highlighted that changing the QD layer fabrication process from spin-coating to EHD printing not only enhanced pixelation but also reduced leakage currents, yielding impressive results for potential high-resolution full-color displays.
High efficiency perovskite light-emitting diodes (PeLEDs) using PEDOT:PSS/MoO-ammonia composite hole transport layers (HTLs) with different MoO-ammonia ratios were prepared and characterized. For PeLEDs with one-step spin-coated CHNHPbBr emitter, an optimal MoO-ammonia volume ratio (0.02) in PEDOT:PSS/MoO-ammonia composite HTL presented a maximum luminance of 1082 cd/m and maximum current efficiency of 0.
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- Researchers developed high-efficiency blue OLEDs using various hole and electron transport layers to optimize their performance.
- The OLED with the TAPC hole transport layer achieved a significant luminance of 2955 cd/m and current efficiency that was notably higher compared to the device using molybdenum trioxide.
- By switching the electron transport layer from TPBi to Bphen, the maximum luminance improved to 3640 cd/m, indicating that the choice of transport materials is crucial for enhancing OLED performance and lifespan.