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Solar cell

A technology of solar cells and conductive layers, applied in the field of solar cells, can solve the problems of increased electrode resistance and poor crystallinity, and achieve the effect of suppressing the decline of battery characteristics

Active Publication Date: 2013-05-01
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For flexible thin-film solar cells using plastic films as supports, organic thin-film solar cells using organic semiconductors containing conductive polymers as photoelectric conversion layers, and solar cells that combine the two, it is necessary to avoid degradation of organic materials. Electrodes are formed at low temperature, but if TCO such as ITO is deposited at low temperature, its crystallinity will deteriorate and the resistance of the electrode will increase

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] [Formation of auxiliary wiring for positive electrode]

[0133] [Preparation of silver halide emulsion]

[0134] The following solution A was kept at 34°C in the reaction vessel, and the pH was adjusted to 2.95 with nitric acid (concentration: 6%) while stirring at high speed using a mixing and stirring device described in JP-A-62-160128. Next, the following solution B and the following solution C were added at a constant flow rate by the double injection method at intervals of 8 minutes and 6 seconds. After the addition, the pH was adjusted to 5.90 using sodium carbonate (concentration: 5%), and then solution D and solution E described below were added.

[0135] (Solution A)

[0136]

[0137] (Solution B)

[0138] Silver nitrate 169.9g

[0139] Nitric acid (6% concentration) 5.89 cm 3

[0140] The total amount of pure water is 317.1cm 3 .

[0141] (Solution C)

[0142] Alkali-treated inert gelatin (average molecular weight 100,000) 5.66g

[0143] Sodium ch...

Embodiment 2～9 and comparative example 1～6

[0217] An organic thin-film solar cell was produced in the same manner as in Example 1 except that the metal negative electrode and the auxiliary metal wiring for the negative electrode were changed as shown in Table 1, and the conversion efficiency was measured.

Embodiment 10

[0219] [Auxiliary wiring for positive electrode / Formation of positive electrode]

[0220] The auxiliary wiring for positive electrodes and the positive electrode were formed in the same manner as in Example 1.

[0221] [Formation of photoelectric conversion layer]

[0222] In the same manner as in Example 1, a composition obtained by dissolving P3HT and PCBM in chlorobenzene was coated on the positive electrode, and a bulk heterojunction photoelectric conversion layer was formed without heat treatment.

[0223] [Electron transport layer / Auxiliary metal wiring for negative electrode / Formation of translucent metal negative electrode]

[0224] Aluminum (film thickness: 2 nm) was vacuum-deposited on the entire surface of the photoelectric conversion layer as an electron transport layer.

[0225] Next, aluminum (film thickness: 0.4 μm) was vacuum-deposited on the electron transport layer as an auxiliary metal wiring for negative electrodes. At this time, vapor deposition was car...

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Abstract

A solar cell 10 has a support 12, a positive electrode 20 disposed on the support, a photoelectric conversion layer 22 disposed on the positive electrode, a translucent metal negative electrode 26 which is disposed on the photoelectric conversion layer and is provided with a positive standard electrode potential, and an additional metal electrode 28 for the negative electrode, the additional metal electrode being disposed so as to be in contact with the metal negative electrode and being provided with a standard electrode potential that is less than the standard electrode potential of the metal negative electrode.

Description

technical field [0001] The invention relates to a solar cell. Background technique [0002] In recent years, demand for solar cells has increased, and attention has been drawn to organic electronic devices that can be expected to be lightweight (flexible) and cost-reduced. In particular, expectations for all-solid-state organic thin-film solar cells are rising. [0003] As a constitution of an organic thin film solar cell, generally, a bulk heterojunction photoelectric conversion layer is disposed between two different types of electrodes (positive and negative electrodes), wherein the bulk heterojunction photoelectric conversion The layer is made by mixing electron supply material (donor) and electron acceptor material (acceptor). Compared with conventional thin film solar cells using amorphous silicon etc., organic thin film solar cells are easy to manufacture and can be produced at low cost. The advantage of producing a solar cell with an arbitrary area is expected to b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/04H01L51/42H10K99/00
CPCB82Y10/00H01L31/022425H01L51/0047H01L51/4253H01L51/441H01L51/0036Y02E10/549Y02P70/50H10K85/215H10K85/113H10K30/81H10K30/30H10K30/50H10K30/57
Inventor 前原佳纪
Owner FUJIFILM CORP