The influence of spinodal decomposition-based phase separation in a hybrid polymer hole transport layer on electroluminescent quantum dot light-emitting diodes

Abstract

Spinodal decomposition-based micro phase separation was found in hybrid poly(9,9-dioctylfluorene-alt-N-(4-sec-butylphenyl)-diphenylamine) (TFB) and polyvinylcarbazole (PVK) system, which is used as a hole transporting layer (HTL) in atmosphere-based quantum dot (QD) light-emitting...

Advancements in semiconductor quantum dots: expanding frontiers in optoelectronics, analytical sensing, biomedicine, and catalysis

“…Eliminating phase separation enhanced electroluminescent performance in both glass and flexible polyimide substrates, showing decreased turn-on voltage by 29–32% and increased brightness by 133–200%. 105 Furthermore, Cuixia Yuan et al introduced a top-emitting structure for alloyed ZnSeTe CQD-based QLEDs to address issues of unsaturated emissions and broad spectra. The structure incorporated a transparent indium–zinc-oxide (IZO) top electrode and an IZO phase tuning layer (PTL) to modulate emission spectra and device efficiency.…”

Zn-Doped SnO2 NPs as Electron Transport Layer in Green CdSe/ZnS Quantum Dot Light-Emitting Diodes

“…For example, stepwise polymer/polymer co-HTLs of poly[9,9dioctylfluorene-co-N-[4-(3-methylpropyl)]-diphenylamine] (TFB)/poly(9-vinylcarbazole) (PVK) and poly(4-butylphenyldiphenylamine) (poly-TPD)/PVK were used to modify the hole-transport property and realize high-performance devices. 39,40 In this work, dual regulation strategies are applied to optimize the device performance. First, solution-synthesized SnO 2 NPs are used as the ETL.…”

“…Recently, polymer and small-molecule mixtures as HTL were demonstrated to improve the QLED performance. For example, stepwise polymer/polymer co-HTLs of poly­[9,9-dioctylfluorene- co -N-[4-(3-methylpropyl)]-diphenylamine] (TFB)/poly­(9-vinylcarbazole) (PVK) and poly­(4-butylphenyl-diphenylamine) (poly-TPD)/PVK were used to modify the hole-transport property and realize high-performance devices. , …”

Advanced HIL strategies in QLEDs: V2O5 and PEDOT:PSS dual-layer for charge balance and electron leakage prevention

“…In recent years, significant advancements in device performance have been achieved alongside the development of materials for the constituent layers of QLEDs, including hole injection layers (HIL), hole transport layers (HTL), and electron transport layers (ETL). 6,7 Most QLEDs use the organic HIL polyethylenedioxythiophene:polystyrene sulfonate (PEDOT:PSS) owing to its high conductivity and transparency. 8 However, the corrosive and hygroscopic of PEDOT:PSS can be detrimental to the efficiency and stability of QLEDs.…”