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Preparation method of blue-light perovskite light-emitting diode

A technology of light-emitting diodes and perovskites, which is applied in photovoltaic power generation, semiconductor/solid-state device manufacturing, semiconductor devices, etc., can solve the problems of poor stability and low PLQY of perovskite films, and achieve hole and electron injection balance, Effects of improving external quantum efficiency and improving stability

Pending Publication Date: 2022-08-05
SHANGHAI UNIV
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Problems solved by technology

However, this doped perovskite film not only has a low PLQY, but also has extremely poor stability

Method used

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  • Preparation method of blue-light perovskite light-emitting diode
  • Preparation method of blue-light perovskite light-emitting diode
  • Preparation method of blue-light perovskite light-emitting diode

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Embodiment 1

[0053] In this embodiment, the preparation method of a Blu -ray perovskite light -emitting diode, including the following steps:

[0054] a. Preparation passivation agent TMBBR:

[0055] Solk the triathrine basic methalmamide 0.9g in at least 25ml ethanol, use ice water bath to cool down to less than 10 ° C, and slowly add at least 2ml of mass percentage concentration of hydrocelatic acid with no less than 48 %. During the period, the temperature of the mixed solution was below 10 ° C, and the response was at least two hours. After the reaction was over, the product solution was not less than 7800r.m. Use at least 5ml to remove ionic water and wash away the unresponsive object; then centrifuge the mixture for at least 30 seconds at a speed of 7800R.P.M until the layer appears, and the rotation of the positive hexane solution of the upper layer product can be evaporated by the non -death of 50 ° C to get white. The product is TMBBR powder;

[0056] b. Preparation TMB 2 PBBR 4 Solut...

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Abstract

The invention discloses a preparation method of a blue light perovskite light-emitting diode. The preparation method comprises the following steps: preparing a passivating agent TMBBr, preparing a TMB2PbBr4 solution, synthesizing CsPbBr3 powder, preparing a quasi-two-dimensional blue light perovskite PEAxPA2-x (CsPbBr3) n-1PbBr4: TMBBr precursor solution, and preparing a three-dimensional mixed halogen perovskite light-emitting diode device. According to the invention, bis (trifluoromethylsulfonyl) imide sodium is used as an interface modification layer of nickel oxide (NiOx), and 4-(trifluoromethyl) benzamide hydrobromide is introduced into a quasi-two-dimensional perovskite precursor solution, so that the device has excellent spectral stability and better device performance.

Description

Technical field [0001] The present invention involves the preparation of a perovskite light diode device, especially the preparation method of high -efficiency and stable quasi -two -dimensional Blu -ray perovskite luminous diode device, which is applied to the field of new display device manufacturing technology. Background technique [0002] Metal halide perovskite (MHP) has excellent optical and electrical properties with high luminous color purity, easy band -mortar, and high load migration rate. It is an ideal luminous material application used in the light -emitting diode (LED). [0003] In recent years, the development of perovskite emitted diode (Peleds) is very rapid. The stability and external quantum efficiency (EQE) of green light and red light PELEDS have been greatly improved. -2 ), EQE has exceeded 20 %, and device performance is already comparable to the traditional OLED. However, the stability and EQE of Blu -ray PELEDS are still very lagging. The life span of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/56
CPCH10K50/844H10K71/00Y02E10/549
Inventor 杨绪勇袁豪王林李文强孔令媚史星宇
Owner SHANGHAI UNIV
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