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Method for preparing organic solar cell with vertical phase gradient distribution photoactive layer by oscillation-assisted spin-coating process

A technology of solar cells and photoactive layers, applied in photovoltaic power generation, circuits, electrical components, etc., can solve the problems of low photogenerated carrier transport and interface transfer efficiency, poor phase separation in the photoactive layer, and high carrier recombination Probability and other issues, to achieve the effect of optimizing the phase separation of the donor/acceptor inside the photoactive layer, increasing the electron mobility, and improving the contact situation

Active Publication Date: 2020-05-15
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a method for preparing an organic solar cell with a vertical phase gradient distribution photoactive layer by an oscillation-assisted spin coating process, aiming to solve the problem of poor phase separation in the photoactive layer of the non-fullerene system, which leads to The separation, transmission and interface transfer efficiency of photogenerated carriers is low, which makes the device have a large interface contact resistance and a high probability of carrier recombination, which ultimately reduces the performance of the device.

Method used

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  • Method for preparing organic solar cell with vertical phase gradient distribution photoactive layer by oscillation-assisted spin-coating process
  • Method for preparing organic solar cell with vertical phase gradient distribution photoactive layer by oscillation-assisted spin-coating process
  • Method for preparing organic solar cell with vertical phase gradient distribution photoactive layer by oscillation-assisted spin-coating process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 (control group):

[0035] (1) Clean the substrate composed of the transparent substrate 1 and the transparent conductive cathode ITO 2 whose surface roughness is less than 1mm, and dry it with nitrogen after cleaning;

[0036] (2) Spin-coat ZnO (5000rpm, 50s, 40nm) on the surface of the transparent conductive cathode ITO 2 to prepare the cathode buffer layer 3, and perform thermal annealing on the formed film (200°C, 2h);

[0037] (3) PBDB-T:ITIC (1:1, 8mg / ml) solution was dripped on the cathode buffer layer 3, and the photoactive layer 4 was prepared by spin coating (2000rpm, 40s, 110nm);

[0038](4) PBDB-T at room temperature: ITIC photoactive layer 4 was placed in a glove box for 10 minutes;

[0039] (5) evaporate MoO on the photoactive layer 4 anode buffer layer 5 (15nm);

[0040] (6) Evaporate metal anode Ag (100nm) on the anode buffer layer;

[0041] (7) Under standard test conditions: AM 1.5, 100mW / cm 2 , the measured open circuit voltage (VOC) o...

Embodiment 2

[0043] (1) Clean the substrate composed of the transparent substrate 1 and the transparent conductive cathode ITO 2 with a surface roughness less than 1 nm, and dry it with nitrogen after cleaning;

[0044] (2) Spin-coat ZnO (5000rpm, 50s, 40nm) on the surface of the transparent conductive cathode ITO 2 to prepare the cathode buffer layer 3, and perform thermal annealing on the formed film (200°C, 2h);

[0045] (3) PBDB-T:ITIC (1:1, 8mg / ml) solution was dripped on the cathode buffer layer 3, and the substrate was ultrasonically treated (1min, 20kHz);

[0046] (4) Prepare the photoactive layer 4 by spin coating process (2000rpm, 40s, 110nm);

[0047] (5) PBDB-T at room temperature: ITIC photoactive layer 4 was placed in a glove box for 10 minutes;

[0048] (6) evaporate MoO on the photoactive layer 4 anode buffer layer 5 (15nm);

[0049] (7) Evaporate metal anode Ag (100nm) on the anode buffer layer;

[0050] (8) Under standard test conditions: AM 1.5, 100mW / cm 2 , the meas...

Embodiment 3

[0052] (1) Clean the substrate composed of the transparent substrate 1 and the transparent conductive cathode ITO 2 with a surface roughness less than 1 nm, and dry it with nitrogen after cleaning;

[0053] (2) Spin-coat ZnO (5000rpm, 50s, 40nm) on the surface of the transparent conductive cathode ITO 2 to prepare the cathode buffer layer 3, and perform thermal annealing on the formed film (200°C, 2h);

[0054] (3) PBDB-T:ITIC (1:1, 8mg / ml) solution was dripped on the cathode buffer layer 3, and the substrate was ultrasonically treated (1min, 30kHz);

[0055] (4) Prepare the photoactive layer 4 by spin coating process (2000rpm, 40s, 110nm);

[0056] (5) PBDB-T at room temperature: ITIC photoactive layer 4 was placed in a glove box for 10 minutes;

[0057] (6) Evaporate MoO on the photoactive layer 4 3 Anode buffer layer 5 (15nm);

[0058] (7) Evaporate metal anode Ag (100nm) on the anode buffer layer;

[0059] (8) Under standard test conditions: AM 1.5, 100mW / cm 2 , the m...

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Abstract

The invention relates to a method for preparing an organic solar cell with a vertical phase gradient distribution photoactive layer by an oscillation-assisted spin-coating process. The organic solar cell adopts an inversion structure and sequentially comprises a substrate, a transparent conductive cathode ITO, a ZnO cathode buffer layer, a photoactive layer, an MoO3 anode buffer layer and a metalanode from bottom to top. Before the spin coating of the active layer, the ultrasonic oscillation is carried out on an active layer solution dropwise covering the ZnO cathode buffer layer, so that the solution is promoted to form the vertical phase gradient distribution morphology that a micromolecular non-fullerene material with smaller volume is deposited below the solution and a polymer molecular material with larger volume is enriched above the solution, and the problems that the separation and transmission of the photon-generated carriers and the transmission efficiency between interfaces are low due to the poor internal phase separation of a non-fullerene system photoactive layer, so that a device has higher interface contact resistance and higher carrier recombination probability,and finally the performance of the device is reduced, are solved.

Description

technical field [0001] The invention relates to the technical field of organic polymer photovoltaic devices or organic semiconductor thin-film solar cells, in particular to a method for preparing an organic solar cell with a vertical phase gradient distribution photoactive layer by an oscillation-assisted spin coating process. Background technique [0002] With the rapid development of the world economy and the updating of science and technology, the human demand for energy is increasing day by day. However, the two major problems of fossil energy reserves and environmental pollution caused by the excessive use of traditional fossil energy have also emerged. Therefore, The development and utilization of new clean energy is considered to be a key project in the new century. In this context, solar energy, as a renewable green energy, has attracted extensive attention from researchers for its inexhaustible, inexhaustible, widely distributed, completely green and non-polluting c...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/12H10K30/451Y02E10/549
Inventor 张大勇杨根杰李嘉文于军胜
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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