Photoelectric device including lithium titanate membrane electrode and application thereof

A thin-film electrode and optoelectronic device technology, which is applied in the fields of instruments, optics, nonlinear optics, etc., can solve the problems of slow response speed of color change of inorganic color-changing films, poor chemical stability of organic color-changing films, poor substrate adhesion, etc., and achieve excellent cycle stability Durability, high coloring and fading response speed, strong adhesion effect

Active Publication Date: 2011-06-15
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One object of the present invention is to provide a thin film electrode containing lithium titanate, the discoloration mechanism of the lithium titanate material is the energy band change caused by lithium intercalation, and the unit cell parameters of the material do not change after lithium intercalation, which is "zero" Strain" material, and lithium ions can be intercalated and extracted from three-dimensional directions, with high ion conductivity and diffusion coefficient, which can overcome the shortcomings of existing inorganic color-changing films with slow color-changing response speed; organic color-changing films have poor chemical stability and poor adhesion to the substrate. , so as to provide a thin-film electrode with good cycle reversibility, long life, and high discoloration response speed

Method used

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  • Photoelectric device including lithium titanate membrane electrode and application thereof
  • Photoelectric device including lithium titanate membrane electrode and application thereof
  • Photoelectric device including lithium titanate membrane electrode and application thereof

Examples

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Embodiment 1

[0029] Example 1. Preparation of a lithium titanate thin film electrode of the present invention as a color-changing electrode of an electrochromic device.

[0030] Lithium titanate thin film electrodes can be prepared by the following method. Using the radio frequency sputtering method, the phase-pure spinel-structured Li 4 Ti 5 o 12 The ceramic sheet is used as the target material, and the deposition atmosphere is Ar / O 2 Mixed gas (Ar and O 2 The flow ratio is 1:2), the deposition pressure is 1.0Pa, the radio frequency power is 200 watts, the deposition temperature is 600°C, and the deposition time is 1 hour, and the 500nm thick Li 4 Ti 5 o 12 film. The X-ray diffraction (XRD) spectrum of the film electrode is as follows figure 1 As shown, using the Li 4 Ti 5 o 12 The film is used as the color-changing electrode of the electrochromic device, using the metal Li ion storage layer as the counter electrode, 1mol LiCiO 4 Dissolve in 1L propylene carbonate (PC) solutio...

Embodiment 2

[0031] Example 2. Preparation of a photoelectric device containing a lithium titanate thin film electrode according to the present invention.

[0032] Photoelectric devices containing lithium titanate thin film electrodes can be prepared by the following method. Using pulsed laser sputtering method, 248 nm excimer laser as laser source, pure phase Li 4 Ti 5 o 12 The ceramic sheet was used as the target material, and the deposition atmosphere was O 2 , the deposition pressure was 20Pa, the deposition temperature was 500°C, and the deposition time was 2 hours, the 500nm thick Li was deposited on indium tin oxide (ITO) transparent conductive glass. 4 Ti 5 o 12 film. in Li 4 Ti 5 o 12 Deposit 1um LiLaTiO on the thin film 3 As the electrolyte material, then in LiLaTiO 3 Deposit 200nmLiFePO on 4 thin film as an ion storage layer, and finally in LiFePO 4 20nm Pt was deposited on the film as a current collector. That is to prepare a Li 4 Ti 5 o 12 The thin-film electr...

Embodiment 3

[0033] Example 3. Preparation of a photoelectric device containing a lithium titanate thin film electrode according to the present invention.

[0034] Photoelectric devices containing lithium titanate thin film electrodes can be prepared by the following method. 10g Li 4 Ti 5 o 12 and 2g nano-Al 2 o 3 Disperse in 50 mL of polymethyl methacrylate (PMMA) to form a slurry. This slurry was spin-coated on indium tin oxide (ITO) transparent conductive glass for 2 minutes at a spin-coating rate of 4000 rpm, and then heat-treated at 450°C in air for 30 minutes to prepare Li 4 Ti 5 o 12 Li as the matrix 4 Ti 5 o 12 and Al 2 o 3 Composite thin film electrodes. Use this thin film electrode as a color-changing electrode of an electrochromic device, using lithiated CeO deposited on indium tin oxide (ITO) transparent conductive glass 2 As the ion storage layer constitutes the counter electrode, the electrolyte is 1mol LiPF 6 Soluble in 1L of a mixed solvent of EC (ethylene ca...

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Abstract

The invention provides a photoelectric device including a lithium titanate membrane electrode, which at least comprises a lithium titanate membrane electrode, electrolyte and a counter electrode, wherein a lithium titanate membrane grows on a transparent conductive substrate, and the thickness of the membrane is 1nm-100mum. The lithium titanate membrane comprises a substance with a chemical composition of Li4+xAaTi5-yO12-zBb, wherein A is selected from at least one of H, Na, K, Mg, Ca, Sr, Ba, B, Al, Ga, In, Si, Ge, Sn, Pb, Sc, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd,La, Ce, Pr, Nd, Sm, Eu, Gd, Er, Tm, Yb, Lu, W, Pt, Au or Bi; B is selected from at least one of N, P, S, Se, F, Cl, Br or I; x, a, y, z and b represent molar percent; and x is larger than or equal to-4 and smaller than or equal to 4, a is larger than or equal to 0 and smaller than or equal to 4, y is larger than or equal to 0 and smaller than or equal to 4, z is larger than or equal to 0 and smaller than or equal to 3 and b is larger than or equal to 0 and smaller than or equal to 4.

Description

technical field [0001] The invention relates to the field of optoelectronics, in particular to an optoelectronic device containing a lithium titanate thin film electrode. Background technique [0002] Since Plant first proposed the concept of electrochromism in the 1960s, the phenomenon of electrochromism has attracted widespread attention. The light transmittance of electrochromic devices can be adjusted freely in a wide range, and it also has the characteristics of storage and memory, low driving voltage for color change, simple power supply, power saving, and little environmental impact, so it has very broad application prospects. It can be used as a large-area display device for luminous flux adjustment valves such as cameras and lasers, building doors and windows, radios, automotive vehicles, image recording, information processing, optical memory, optical switches, holograms, decorative materials, stealth materials and safety protection materials Wait. The main compo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/155
Inventor 禹习谦汪锐李泓黄学杰
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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