Quantum dot light-emitting device, preparing method and display device
AssigneeBoe Technology Group Co., Ltd.
InventorJingwen Feng
Life of this patent
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Abstract
The present disclosure provides a quantum dot light-emitting device, a preparing method and a display device. The quantum dot light-emitting device includes an anode, a hole transport layer, a quantum dot light-emitting layer, an electron transport layer and a cathode laminated one on another. The quantum dot light-emitting layer includes heterodimer quantum dots, the heterodimer quantum dots include first quantum dots carrying a positive charge and second quantum dots carrying a negative charge, and each first quantum dot and each second quantum dot have a same energy gap and different positions of conduction band and valence band.
Claims18
A quantum dot light-emitting device, comprising an anode, a hole transport layer, a quantum dot light-emitting layer, an electron transport layer and a cathode laminated one on another, wherein the quantum dot light-emitting layer comprises heterodimer quantum dots, the heterodimer quantum dots comprise first quantum dots carrying a positive charge and second quantum dots carrying a negative charge, and each first quantum dot and each second quantum dot have a same energy gap and different positions of conduction band and valence band;
- wherein each first quantum dot in the quantum dot light-emitting layer carries a cationic surfactant, and each second quantum dot in the quantum dot light-emitting layer carries an anionic surfactant.
A method for preparing a heterodimer quantum dot, comprising:
- acquiring first quantum dots and second quantum dots, each first quantum dot and each second quantum dot having a same energy gap and different positions of conduction band and valence band;
- enabling each first quantum dot to carry a positive charge and enabling each second quantum dot to carry a negative charge;
- and
- mixing the first quantum dots carrying the positive charge and the second quantum dots carrying the negative charge to acquire the heterodimer quantum dot;
- wherein the enabling each first quantum dot to carry the positive charge and enabling each second quantum dot to carry the negative charge comprises:
- forming a colloid of the first quantum dots, and adding a cationic surfactant into the colloid of the first quantum dots to acquire the first quantum dots carrying the positive charge;
- and
- forming a colloid of the second quantum dots, and adding an anionic surfactant into the colloid of the second quantum dots to acquire the second quantum dots carrying the negative charge.
A method for preparing a quantum dot light-emitting device, comprising forming an anode, a hole transport layer, a quantum dot light-emitting layer, an electron transport layer and a cathode laminated one on another, wherein the quantum dot light-emitting layer comprises heterodimer quantum dots, the heterodimer quantum dots comprise first quantum dots carrying a positive charge and second quantum dots carrying a negative charge, and each first quantum dot and each second quantum dot have a same energy gap and different positions of conduction band and valence band;
- wherein each first quantum dot in the quantum dot light-emitting layer carries a cationic surfactant, and each second quantum dot in the quantum dot light-emitting layer carries an anionic surfactant.
Dependencies are inferred from the claim text.