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Organic solar cells and method of manufacturing the same

A solar cell, organic technology that can be used in final product manufacturing, sustainable manufacturing/processing, semiconductor/solid-state device manufacturing, etc., to solve problems such as the degree of molecular orientation limitation and improving efficiency

Inactive Publication Date: 2009-12-23
KOREA ADVANCED INST OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is advantageous because a continuous process can be carried out in a roll-to-roll manner, but the degree of molecular orientation is limited, making it difficult to greatly increase the efficiency

Method used

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  • Organic solar cells and method of manufacturing the same
  • Organic solar cells and method of manufacturing the same
  • Organic solar cells and method of manufacturing the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Example 1: Fabrication of organic solar cells using nanoimprinting after drying the photoactive layer

[0053] 1-1: Formation of hole transport layer

[0054] The ITO-coated glass substrate was washed with acetone and alcohol using an ultrasonic cleaner, and then subjected to plasma treatment using an oxygen plasma generator (PDC-32G, available from Harrick Plasma) in an oxygen atmosphere, thereby removing organic substances from the surface. Hydroxyl groups are formed on the surface of ITO, making the ITO surface hydrophilic. Then, poly(3,4-ethylenedioxythiophene)-polystyrenesulfonate (obtained from Bayer) was coated on the hydrophilic surface of ITO by spin coating, and then dried at 140 °C, so that the The solvent was removed, thereby forming a hole transport layer on the glass substrate.

[0055] 1-2: Formation of photoactive layer

[0056] 30 mg of electron donor material, e.g., poly-3-hexylthiophene (P3HT) and 21 mg of electron acceptor material, e.g., PCBM, we...

Embodiment 2

[0061] Example 2: Fabrication of organic solar cells using nanoimprinting prior to drying the photoactive layer

[0062] An organic solar cell was fabricated in the same manner as in Example 1, except that in Examples 1-2, the mixture of the photoactive layer coated on the hole transport layer was not dried, and a mold was placed in which the just-coated The solvent of the mixture is dried in a state of the mixture on the photoactive layer after the mixture.

experiment example 1

[0067] Experimental example 1: Comparison of characteristics of solar cells

[0068] The current-voltage characteristics of the organic solar cells manufactured in Examples 1 and 2 and Comparative Examples 1 and 2 were compared using a solar simulator (66984 from Newport). As a solar simulator, a 300W xenon lamp (6258 from Newport) and an AM1.5G filter (81088A from Newport) were used, and the intensity of the light was set to 100mW / cm 2 .

[0069] From Table 1 and Figure 7 From the results shown, it can be seen that compared with the organic solar cells of Comparative Examples 1 and 2, the organic solar cells of Examples 1 and 2 had very high short-circuit currents. In addition, when evaluating the effect of heat treatment for making the photoactive layer flexible during the nanoimprint process of Example 1 on the improvement of short-circuit current, because compared with the organic solar cell of Comparative Example 1 without heat treatment, no The solar cell of Comparat...

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Abstract

An organic solar cell and a method of manufacturing the same. This invention relates to a method of manufacturing an organic solar cell including forming nano patterns on a photoactive layer using a nanoimprinting process, and applying a cathode electrode material on the photoactive layer having the nano patterns so that the cathode electrode material infiltrates the nano patterns of the photoactive layer, thus increasing electron conductivity and efficiently forming a pathway for the transfer of electrons, and to an organic solar cell manufactured through the method. This method reduces loss of photocurrent occurring as a result of aggregation of an electron acceptor material and improves molecular orientation of an electron donor in the nanoimprinting process to thus increase cell efficiency. Thereby, the organic solar cell having high efficiency is manufactured at low cost through a simple manufacturing process. The method can be applied to the fabrication of organic solar cells which use an environmentally friendly and recyclable energy source.

Description

[0001] Cross-References to Related Applications [0002] This patent application claims priority from Korean Patent Application No. 10-2008-0057357 filed on Jun. 18, 2008, the contents of which are incorporated herein by reference. technical field [0003] The present invention relates to an organic solar cell and its manufacturing method. More specifically, the present invention relates to a method of manufacturing an organic solar cell, comprising forming a nanopattern on a photoactive layer of an organic solar cell using a nanoimprint process, and coating a cathode electrode on the photoactive layer with the nanopattern A material such that the cathode electrode material penetrates into the nano-pattern of the photoactive layer, thereby increasing electron conductivity and effectively forming a path for transporting electrons; and also relates to an organic solar cell manufactured by the above method. Background technique [0004] A solar cell is a semiconductor device t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/44H01L51/46G03F7/00H01L51/42
CPCH01L51/0037H01L51/442B82Y10/00Y02E10/50H01L51/4253H01L51/0036H01L51/0047H01L51/447Y02E10/549H01L51/0023Y02P70/50H10K71/621H10K85/1135H10K85/215H10K85/113H10K30/87H10K30/82H10K30/30H10K30/60H10K30/50
Inventor 郑喜台李在宪金大禹张泓
Owner KOREA ADVANCED INST OF SCI & TECH
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