Inverted CdSe–ZnS quantum dots light-emitting diode using low-work function organic material polyethylenimine ethoxylated

Hybrid Area‐Emitting Transistors: Solution Processable and with High Aperture Ratios

“…The addition of the PEIE as a WML has two distinct effects on the overall function of the device. The first is to lower the injection barrier of electrons from the ZTO to the LUMO of the emissive layer, shown schematically in Figure S7 (Supporting Information), and the second is that its addition leads to “area emission.” Previous studies report that the thin layer of PEIE on ZTO leads to the formation of interfacial dipoles between the ZTO/PEIE and the emissive layer. The presence of these dipoles gives rise to a net electric field at the interface that shifts the vacuum work function of ZTO by almost 0.7 eV as determined by Kelvin probe microscopy (see Figure S9, Supporting Information), thereby causing a reduction of the electron injection barrier, and a better match with the LUMO of the polymer.…”

MoO3-induced oxidation doping of PEDOT:PSS for high performance full-solution-processed inverted quantum-dot light emitting diodes

“…The inverted QD-LEDs also enable an easy integration with the thin film transistor backplanes for use in display applications. [8][9][10] Thus, much effort has been devoted to developing high efficient solution-processed inverted QD-LEDs, [10][11][12][13] However, most of these QD-LEDs were made by the thermal evaporation process, [13] which is not a commercial viable approach for low-cost manufacturing.…”

Polyethylenimine Aqueous Solution: A Low-Cost and Environmentally Friendly Formulation to Produce Low-Work-Function Electrodes for Efficient Easy-to-Fabricate Organic Solar Cells

“…Previously we have demonstrated polyethylenimine (PEI) is able to substantially reduce the work function of conductors such as metals, metal oxides, conducting polymers and graphene. 6 Later on it has been widely used to produce low-work function electrodes for semiconducting optoelectronics devices, such as organic (or perovsikte) solar cells, [7][8][9][10][11][12][13][14] organic (or inorganic) light emitting diodes, [15][16][17][18][19][20] organic photodetectors, [21][22] and organic (or inorganic) field effect transistors. [23][24][25][26][27] Generally, 2-methoxyethanol (MEA) has been used as the solvent to process the PEI and the modification layer is typically prepared by spin coating method.…”