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Light absorbing layer, photoelectric transducer, and solar cell
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A light-absorbing layer and element technology, which is applied in the field of solar cells, can solve problems such as the inability to expect a large cost reduction, and achieve excellent photoelectric conversion efficiency
Pending Publication Date: 2020-12-15
KAO CORP
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Problems solved by technology
[0003] Since ordinary silicon solar cells use ultra-high-purity silicon and are manufactured by "dry processes" such as epitaxial crystal growth under high vacuum, a large cost reduction cannot be expected.
Method used
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preparation example Construction
[0110]The preparation method of the above-mentioned dispersion liquid is not particularly limited. From the viewpoints of easiness of manufacture, cost, storage stability of the dispersion liquid, improvement of photoelectric conversion efficiency, etc., the mixing temperature is preferably 0° C. or higher, more preferably 10° C. or higher, and even more preferably It is 20°C or higher, preferably 50°C or lower, more preferably 40°C or lower, still more preferably 30°C or lower. In addition, from the same viewpoint, the mixing time is preferably more than 0 hours, more preferably 0.1 hours or more, preferably 72 hours or less, more preferably 24 hours or less, still more preferably 1 hour or less.
[0111] The above-mentioned dispersion is preferably a dispersion that has been filtered to remove coarse particles, and from the viewpoints of ease of manufacture, cost, storage stability of the dispersion, improvement in photoelectric conversion efficiency, etc., the filter pore di...
Embodiment 1
[0406] The following steps (1) to (7) were sequentially performed to fabricate a battery cell.
[0407] (1) Etching and cleaning of FTO substrate
[0408]Part of a 25 mm square glass substrate with fluorine-doped tin oxide (FTO) (manufactured by Asahi Glass Fabritech Co., Ltd., 25×25×1.8mm, hereinafter referred to as FTO substrate) was etched with Zn powder and 2mol / L hydrochloric acid aqueous solution . Ultrasonic cleaning was performed for 10 minutes each with 1% by mass neutral detergent, acetone, 2-propanol (IPA), and ion-exchanged water in this order.
[0409] (2) Ozone cleaning
[0410] In the upcoming dense TiO 2 Ozone cleaning of the FTO substrate was performed before the layer formation step. With the FTO side up, the substrate was placed in an ozone generator (ozone cleaner, PC-450UV, manufactured by Meiwafosis Co., Ltd.), and irradiated with UV for 30 minutes.
[0411] (3) Dense TiO 2 Layer (barrier layer) formation
[0412] Dissolve bis(2,4-glutarate)bis(2-p...
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Abstract
The present invention relates to: a light absorbing layer for forming a photoelectric transducer and a solar cell that have excellent photoelectric conversion efficiencies; and a photoelectric transducer and a solar cell that include the light absorbing layer. This light absorbing layer comprises quantum dots dispersed in a matrix of at least one or more perovskite compounds selected from a compound represented by general formula (1) and a compound represented by general formula (2). RMX3 (1) (In the formula, R is two or more of a monovalent cation, M is a divalent metal cation, and X is a halogen anion.) R1R2R3 n-1MnX3n+1 (2) (In the formula, R1, R2, and R3 are each independently a monovalent cation, at least two of R1, R2, and R3 are different monovalent cations, and at least one of R1,R2, and R3 is a monovalent inorganic cation, M is a divalent metal cation, X is a halogen anion, and n is an integer of 1 to 10.).
Description
technical field [0001] The present invention relates to a light-absorbing layer, a photoelectric conversion element having the light-absorbing layer, and a solar cell having the photoelectric conversion element. Background technique [0002] Photoelectric conversion elements that convert light energy into electrical energy are used in solar cells, photosensors, copiers, and the like. In particular, from the viewpoint of environmental and energy issues, a photoelectric conversion element (solar cell) utilizing sunlight, which is an inexhaustible clean energy source, has attracted attention. [0003] Since ordinary silicon solar cells use ultra-high-purity silicon and are manufactured by a "dry process" such as epitaxial crystal growth under high vacuum, a large cost reduction cannot be expected. Therefore, a solar cell manufactured by a "wet process" such as a coating process is expected to be a next-generation solar cell that can be obtained at low cost. [0004] As a next...
Claims
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Application Information
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