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CN-121985668-A - Dynamic color-adjusting semitransparent organic photovoltaic cell and preparation method thereof

CN121985668ACN 121985668 ACN121985668 ACN 121985668ACN-121985668-A

Abstract

The invention discloses a dynamic color-adjusting semitransparent organic photovoltaic cell which sequentially comprises a transparent substrate, a first transparent electrode layer, a semitransparent organic photovoltaic layer, a second transparent electrode layer, an electrochromic layer, a third transparent electrode layer, a transparent top layer and a third transparent electrode layer, wherein the transparent substrate is made of transparent glass, the first transparent electrode layer is an ITO conductive film, the semitransparent organic photovoltaic layer sequentially comprises a PEDOT (proton conducting oxide) cavity transmission layer, a PM6 (particulate matter) L8-BO active layer and a PNDIT-F3N electron transmission layer, the second transparent electrode layer is a 1nm Au seed layer and a 10nm Ag conductive film, the electrochromic layer comprises a WO 3 film layer and a NiO counter electrode layer, the third transparent electrode layer is an ITO conductive film, and the transparent top layer is made of transparent glass. The dynamic color-adjusting semitransparent organic photovoltaic cell provided by the invention can dynamically adjust indoor illumination and heat in all weather and all regions, and can effectively regulate and control the transmission and reflection energy of sunlight when generating electricity, namely realize capacity and photo-thermal management at the same time, thereby remarkably reducing building energy consumption.

Inventors

  • XU TAO
  • CHU JINTAO
  • DENG BAOZHONG
  • LIN ZHENGNAN

Assignees

  • 上海大学

Dates

Publication Date
20260505
Application Date
20260129

Claims (10)

  1. 1. The utility model provides a translucent organic photovoltaic cell of dynamic color mixing, its characterized in that includes organic photovoltaic cell and electrochromic layer, wherein, electrochromic layer includes WO 3 thin film layer and NiO counter electrode layer, WO 3 thin film layer sets up on translucent organic photovoltaic cell's electrode, niO counter electrode layer sets up on commercial ITO glass, WO 3 thin film layer with the NiO counter electrode layer passes through the ionogel bonding.
  2. 2. The dynamically tunable translucent organic photovoltaic cell of claim 1 comprising, in order from bottom to top, the following layers: (1) The transparent substrate is made of transparent glass material; (2) The first transparent electrode layer is an ITO conductive film; (3) The semitransparent organic photovoltaic layer sequentially comprises a PEDOT PSS hole transmission layer, a PM 6L 8-BO active layer and a PNDIT-F3N electron transmission layer, wherein the thickness of the active layer is 80nm; (4) The second transparent electrode layer is a 1nm Au seed layer and a 10nm Ag conductive film; (5) The WO 3 film layer is vacuum coated on the second transparent electrode layer; (6) An ionic gel layer, which is used for connecting the WO 3 film layer and the NiO counter electrode layer, and is prepared by mixing LiClO 4 , PC electrolyte and polymethyl methacrylate according to a mass ratio of 1:3; (7) The NiO counter electrode layer is spin-coated on the third transparent electrode layer; (8) The third transparent electrode layer is an ITO conductive film; (9) The transparent top layer is made of transparent glass material.
  3. 3. The dynamically-tinted translucent organic photovoltaic cell of claim 2 wherein the translucent organic photovoltaic layer has an average visible light transmittance AVT of 32.28%.
  4. 4. The dynamically-tinted translucent organic photovoltaic cell of claim 2 wherein the thickness of the first transparent electrode layer and the second transparent electrode layer is 150nm.
  5. 5. The dynamically tinted translucent organic photovoltaic cell of claim 2 wherein PM6 is the donor and L8-BO is the acceptor, the translucent organic photovoltaic layer having a donor to acceptor mass ratio of 0.6:1.2.
  6. 6. The dynamically tunable translucent organic photovoltaic cell of claim 2 wherein the WO 3 thin film layer is prepared by vacuum evaporation, the nio thin film layer is prepared by solution spin coating at 200nm, spin coating at 2000rpm for 30s, and spin coating both layers.
  7. 7. A method of preparing a dynamically tinted translucent organic photovoltaic cell according to any one of claims 1 to 6, comprising the steps of: (1) Pretreating a commercial ITO glass substrate to form a first transparent electrode layer and a third transparent electrode layer, wherein the first transparent electrode layer and the third transparent electrode layer are sequentially subjected to ultrasonic cleaning, blast drying and plasma treatment; (2) Preparing an electrochromic layer, namely evaporating a WO 3 film layer by a vacuum evaporation method and preparing a NiO film layer by a solution spin-coating method; (3) Preparing ionic gel, namely mixing LiClO 4 , PC electrolyte and polymethyl methacrylate according to a mass ratio of 1:3; (4) Preparing semitransparent organic photovoltaic layers, namely sequentially depositing all functional layers on a commercial ITO substrate by a solution spin coating method, wherein the spin coating speed of an active layer is 3000rpm, the annealing temperature is 130 ℃, and the temperature is kept for 10min; (5) Preparing a second transparent electrode layer, namely depositing a 1nm Au seed layer and a 10nm Ag conductive film by utilizing a vacuum evaporation method; (6) And (3) assembling, namely taking a proper amount of ionic gel by using a needle tube, and integrating the electrochromic device with the semitransparent organic photovoltaic device.
  8. 8. The method for preparing a semitransparent organic photovoltaic cell according to claim 7, wherein when a WO 3 film layer is evaporated by a vacuum evaporation method, the vacuum degree is less than or equal to 8 multiplied by 10 -4 Pa, and the evaporation rate is 0.15-0.2nm/s.
  9. 9. The method for preparing the dynamic color-mixing semitransparent organic photovoltaic cell according to claim 7, wherein the NiO film layer is prepared by a solution spin coating method, the rotation speed is 2000rpm, the spin coating is performed on two layers, the annealing temperature is 300 ℃, and the heat preservation is performed for 60 minutes.
  10. 10. The method of preparing a dynamically tunable translucent organic photovoltaic cell according to claim 8, wherein the thickness of the WO 3 electrochromic active layer is 100-200nm.

Description

Dynamic color-adjusting semitransparent organic photovoltaic cell and preparation method thereof Technical Field The invention relates to the technical field of photovoltaic building integration, in particular to a dynamic color-mixing semitransparent organic photovoltaic cell and a preparation method thereof. Background At present, common float glass with poor heat preservation performance is used, so that the overall energy consumption level of the building is high, and the current energy-saving standard is difficult to meet. Static energy-saving technologies such as LOW-emissivity energy-saving glass (LOW-E glass) have certain energy-saving effects, but cannot respond to dynamic demands of day-night and seasonal climate change, and have limited energy-saving potential. Under the background, a semitransparent organic photovoltaic device (ST-OPV) with light transmission and power generation capacity becomes one of ideal technical paths due to the high adaptability of the ST-OPV and BIPV, and the dynamic light regulating capacity is further endowed to improve the comprehensive energy-saving benefit, so that the ST-OPV has become a key subject of current research. Although the traditional ST-OPV device has the dual functions of light transmission and power generation, the light transmittance is usually fixed, and is difficult to adapt to changeable environmental conditions, so that the energy-saving effect of the ST-OPV device in actual buildings is restricted. Therefore, the dynamic controllability of the ST-OPV light transmission characteristic is realized, and the method has important significance for improving the energy adaptability and energy saving potential of the ST-OPV light transmission characteristic in a real scene. Among the various dynamic dimming techniques, electrochromic smart windows are considered as ideal solutions for functional complementation with ST-OPV due to their reversible, controllable optical adjustment capability. The EC intelligent window can reversibly adjust the transmittance of the electrochromic material to solar spectrum based on the oxidation-reduction reaction of the electrochromic material under the action of an electric field, thereby realizing dynamic management of visible light and near infrared radiation. Specifically, under summer or strong radiation conditions, the EC window can be switched to a dark color or a shading state, solar radiation heat is effectively blocked, indoor cold load is reduced, under winter or weak illumination conditions, the EC window can be restored to a high light transmission state, solar heat is introduced to the maximum extent, heating requirements are reduced, and intelligent regulation and control of warm in winter and cool in summer are realized. The EC dimming unit is integrated with the ST-OPV, the technical bottleneck that the traditional EC window depends on external power supply and has single function can be broken through, and a novel intelligent window system integrating power generation and dynamic dimming is constructed. The integrated device not only realizes the closed-loop operation of self-energy supply and self regulation and control, namely the electric energy generated by ST-OPV can be directly used for driving the color change process of the EC unit, and generates additional electric power to be output to a building micro-grid when the illumination is sufficient, but also has the capability of flexibly regulating and controlling the incident solar spectrum, and can dynamically balance lighting comfort and building energy consumption according to the environment and the use requirement, thereby realizing cooperative optimization among the three of power generation, energy conservation and comfort. However, current multi-mode smart window technology for ST-OPV and EC integrated devices still faces a number of challenges. On one hand, the ST-OPV and the EC unit have obvious differences in material characteristics, preparation process and operation mechanism, and how to realize interface compatibility and cooperative work of the ST-OPV and the EC unit at a microscopic level is a key difficult problem for constructing a high-performance integrated device. On the other hand, the prior art still has difficulty in meeting the practical building application requirements on the core indexes such as light transmittance, photoelectric conversion efficiency, dynamic color mixing range and the like. In addition, the response speed and the cycle life of the dynamic color matching function are also important factors for restricting the technical development. Therefore, the multi-mode intelligent window technology with good interface compatibility, high light transmittance, high efficiency and dynamic color matching function is developed, and the intelligent window technology has important practical value. In the prior art, the application patent with the publication number of CN117153922A provides a dimmable cadmium telluride pow