Organic solar cell with nano-particle close-packed structure

An organic solar cell, nanoparticle technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as low carrier mobility, low utilization of solar spectrum, constraints, etc. Achieve the effects of high carrier mobility, expanded selection range, and high absorption coefficient

Inactive Publication Date: 2016-03-23
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the properties of polymer materials restrict the performance of organic solar cells to a large extent.
For example, the commonly used polymer donor material P3HT has an absorption peak in the range of 350-650nm, while the maximum photon flux of the solar spectrum of AM1.5 is in the 600-800nm ​​band. The mismatch of the spectrum restricts the absorption of sunlight, and P3HT belongs Wide bandgap material, the cut-off wavelength of spectral absorption is 650nm, and the utilization rate of solar spectrum is low; in addition, the carrier mobility of P3HT is low, and the hole mobility is only 0.1cm 2 / Vs, compared with the hole mobility of inorganic materials, there is a big gap, such as the hole mobility of crystalline germanium material is 1900cm 2 / Vs
Therefore, as a donor material for absorbing photons and transporting holes, polymer materials such as P3HT still have many disadvantages, which restrict the improvement of photoelectric conversion efficiency of organic solar cells.

Method used

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  • Organic solar cell with nano-particle close-packed structure
  • Organic solar cell with nano-particle close-packed structure
  • Organic solar cell with nano-particle close-packed structure

Examples

Experimental program
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Embodiment 1

[0022] The preparation of an inverted organic solar cell with a nanoparticle close-packed structure, the specific process is as follows:

[0023] 1. The ITO glass is ultrasonically cleaned with electronic cleaning solution / deionized water / alcohol / acetone / isopropanol in sequence, and blown dry with nitrogen.

[0024] 2. Spin-coat a zinc oxide (ZnO) electron transport layer with a thickness of 30nm on the ITO glass, and anneal at 200°C for one hour.

[0025] 3. Prepare spherical germanium nanoparticles with a diameter of 40-100nm, hydrogen bond passivation on the surface, under low temperature conditions by using flat plate capacitively coupled PECVD technology.

[0026] 4. The germanium nanoparticles were dispersed in 1,2-dichlorobenzene to form a colloidal solution with a concentration of 5 mg / mL; the PC 70 BM was dissolved in the colloidal solution, heated and stirred at 90°C for 12 hours to form a stable active layer solution.

[0027] 5. Spin-coat an active layer with a t...

Embodiment 2

[0031] The preparation of positive structure organic solar cells with nanoparticle close-packed structure, the specific process is as follows:

[0032] 1. The ITO glass is ultrasonically cleaned with electronic cleaning solution / deionized water / alcohol / acetone / isopropanol in sequence, and blown dry with nitrogen.

[0033]2. Spin-coat a layer of poly(3,4-hexenedioxythiophene)-polystyrenesulfonic acid (PEDOT:PSS) hole transport layer with a thickness of 40nm on the ITO glass, and anneal at 100°C for 10 minutes .

[0034] 3. Prepare spherical germanium nanoparticles with a diameter of 40-100nm, hydrogen bond passivation on the surface, under low temperature conditions by using flat plate capacitively coupled PECVD technology.

[0035] 4. The germanium nanoparticles were dispersed in 1,2-dichlorobenzene to form a colloidal solution with a concentration of 5 mg / mL; the PC 70 BM was dissolved in the colloidal solution, heated and stirred at 90°C for 12 hours to form a stable activ...

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Abstract

In an organic solar cell with a nano-particle close-packed structure, amorphous-state germanium nanoparticles are taken as a donor, a fullerene derivative PC70BM is taken as a receptor, and the donor-receptor form a core-shell structure; and the germanium nanoparticles are prepared by a low-cost panel capacitor coupled with a plasma enhanced chemical vapor deposition (PECVD) technique and are closely packed in an active layer of the cell. The organic solar cell with the nano-particle close-packed structure has the advantages that the traditional polymer is substituted by the germanium nanoparticles with wide spectral absorption, high absorption coefficient and high carrier mobility, and a new donor material is provided for preparation of the organic cell.

Description

technical field [0001] The invention relates to the preparation of an organic solar cell, in particular to the preparation of an organic solar cell with a nanoparticle close-packed structure. Background technique [0002] Organic solar cells are called the third-generation solar cells. They have rich raw materials, simple preparation process, and low price. The main advantage is that they are compatible with flexible substrates. , easy to integrate, can be made into transparent and translucent batteries, low cost, and has great development and application prospects in the fields of flexible electronics. [0003] At present, organic solar cells are mainly bulk heterojunction structures. The main feature of this structure is that the donor and acceptor form a uniformly mixed, bicontinuous interpenetrating network. Its beneficial effects are: effectively reducing the distance of exciton diffusion to the donor / acceptor interface, suppressing the quenching of excitons; and incre...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48B82Y30/00
CPCB82Y30/00H10K30/35H10K30/00H10K30/30Y02E10/549
Inventor 倪牮李昶张建军孙小香蔡宏琨张德贤李娟王欣宇李正龙
Owner NANKAI UNIV
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