Hydrazine-coordinated Cu chalcogenide complex and method for producing same, application liquid for forming light-absorbing layer, and method for producing application liquid for forming light-absorbing layer
A chalcogenide and light-absorbing layer technology, applied in photovoltaic power generation, electrical components, circuits, etc., can solve problems such as scale increase and yield deterioration, and achieve the effect of ensuring safety and good storage stability
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no. 1 Embodiment approach
[0057] Hereinafter, the coating liquid for forming a light-absorbing layer of the present invention will be described.
[0058] The coating liquid for forming a light-absorbing layer of the present invention (hereinafter referred to as "coating liquid for forming a CIGS layer") is prepared by making the hydrazine-coordinated Cu chalcogenide complex and the hydrazine-coordinated In The chalcogenide complex and the hydrazine-coordinated Ga chalcogenide complex are dissolved in dimethyl sulfoxide (DMSO).
[0059] In addition, it is preferable that the amine-based solvent is not contained in the coating liquid for forming a light absorption layer.
[0060] Next, the hydrazine-coordinated In chalcogenide complex will be described. The In chalcogenide complex used in this embodiment needs to be dissolved in DMSO to be generated. When generating hydrazine-coordinated In chalcogenide complexes, for example, adding indium selenide (In 2 Se 3 ) And chalcogen elements to obtain a crude produc...
no. 2 Embodiment approach
[0090] Next, a coating liquid for forming a CIGS layer as a second embodiment of this embodiment will be described.
[0091] In this embodiment, while using the hydrazine coordinated Cu chalcogenide complex, the hydrazine coordinated In chalcogenide complex, and the hydrazine coordinated Ga chalcogenide complex described in the first embodiment, A hydrazine-coordinated Sb chalcogenide complex was also used to prepare a coating liquid for forming a light absorption layer.
[0092] When the hydrazine-coordinated Sb chalcogenide complex is formed, antimony selenide (Sb 2 Se 3 ) And chalcogen elements to obtain a crude product (the third crude product), which is then extracted with DMSO, and a poor solvent is added to the resulting solution to recrystallize it to obtain the hydrazine-coordinated Sb chalcogenide complex Compound.
[0093] Specifically, antimony selenide and chalcogen are added to hydrazine, and the mixture is stirred at room temperature for about 3 to 7 days. After that...
Embodiment 1
[0165] In Example 1, the coating liquid for forming a CZTS layer was prepared as follows.
[0166] In the presence of 2 equivalents of hydrazine (378μl, 12.05mmol) relative to metallic Cu, the metallic Cu (383.0mg, 6.03mmol) and 2-4 equivalents of Se (4 equivalents: 1903.2mg, 24.10mmol) in DMSO (10 ml) After stirring at room temperature for 3 days to 1 week, residual hydrazine was removed under nitrogen flow, and filtered with a 0.2 μm PTFE filter.
[0167] IPA (20 ml in total) was slowly added to the filtrate for recrystallization, thereby obtaining a black hydrazine-coordinated Cu-Se complex (2424 mg).
[0168] For the obtained hydrazine-coordinated Cu-Se complex, TGA2950 (manufactured by TA Instruments) was used and thermogravimetric analysis (TGA) was performed at a temperature increase rate of 2°C / min. Show the result in figure 2 .
[0169] Such as figure 2 As shown, it can be confirmed that in the first stage of weight reduction, the hydrazine ligand contained in the complex ...
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