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PEROVSKITE COMPOUND AND LIGHT CONVERSION ELEMENT IN WHICH SAME IS USED NEW_EN

Foreign code F190009942
File No. (S2018-0263-N0)
Posted date Oct 24, 2019
Country WIPO
International application number 2019JP000798
International publication number WO 2019139153
Date of international filing Jan 11, 2019
Date of international publication Jul 18, 2019
Priority data
  • P2018-004523 (Jan 15, 2018) JP
Title PEROVSKITE COMPOUND AND LIGHT CONVERSION ELEMENT IN WHICH SAME IS USED NEW_EN
Abstract [Problem] To provide a Pb-free Sn-halide Perovskite solar cell in which photoelectric conversion efficiency is improved.
[Solution] A solar cell in which there is used a Perovskite compound comprising ABX3 (where A represents a cation, B represents a metal, X represents halogen, and A, B, and X may each be configured from a plurality of elements), B including Sn and Ge.
Outline of related art and contending technology BACKGROUND ART
In recent years, perovskite compound, the light conversion efficiency is extremely high, have garnered attention. In the perovskite compound solar cell is a perovskite, a conventional solid-state dye-sensitized solar cell instead of the dye, forming a layer of a perovskite compound, the hole-transporting layer to form a solid, liquid electrolyte and dye is used in the prior art is higher than the conversion efficiency can be achieved using a large feature.
Perovskite such as perovskite compounds in the formation of a layer in the solar cell is, as the mold layer using the porous titanium film or the like, the mold layer, an organic solvent is dissolved in the perovskite compounds by spin-coating, different crystalline perovskite thin film can be formed by generally performed.
However, dye-sensitized solar cell, organic solar cells, solar cells have a perovskite, a typical printable solar cell. Of the conventional solar cell is a perovskite, perovskite Pb halide as a light absorption layer has a layer, a perovskite type Pb halide is a solar cell, the cell area is small, the photoelectric conversion efficiency is greater than 20% have been reported (Non-Patent Document 1). The conversion efficiency are commercially available inorganic solar cell efficiency approaching. Also, but the spoken presentation, a cell area of 1cm2 by the formula 15% as those of the photoelectric conversion efficiency have been reported.
Generally as a perovskite compound halide, CH3NH3PbI3 is used. The light absorption spectra of the perovskite compound halide in the end is 800nm. Further to 900nm as long as the photoelectric conversion, without lowering the open-circuit voltage can be improved efficiency. For example, the theoretical perovskite of the solar cell voltage loss from the 0.3V and the release voltage, 900nm of light in the visible light between FF: 0.7,IPCE(Incident Photon to Current Efficiency): 0.8 under the condition of assuming that the photoelectrical conversion, the conversion efficiency of 20.4% can be obtained. However, such as conventional CH3NH3PbI3 containing a Pb perovskite solar cell, a high environmental risks, Pb-free perovskite does not contain Pb in the development of the solar cell has been desired.
Currently, the Pb-free perovskite solar cell, a perovskite compound is used as the halogenated Sn perovskite Sn halide known solar cell. Perovskite compound is Sn halide, more than 1200nm has a light absorption spectrum is known, the detailed physical properties is not clear. In addition, a perovskite compound of Sn halide of a solar battery using the photoelectric conversion efficiency is not sufficient, it is possible to improve photoelectric conversion efficiency has been demanded.
Scope of claims (In Japanese)[請求項1]
 ABX 3(Aはカチオン、Bは金属、Xはハロゲンを示し、A、B及びXは、それぞれ複数の元素から構成されてもよい。)からなる化合物であって、
 Bが、Snと、Sn及びPbを除く周期律表12、13、14、15及び16属の金属の少なくとも1種とを含むことを特徴とするペロブスカイト化合物。

[請求項2]
 Bが、Sn及びGeを含むことを特徴とする請求項1記載のペロブスカイト化合物。

[請求項3]
 Bが、Sn及びGeからなることを特徴とする請求項2記載のペロブスカイト化合物。

[請求項4]
 BにおけるSnとその他の金属との元素構成割合が、Snが70~99.5%であると共に、その他の金属が0.5~30%であることを特徴とする請求項1~3のいずれか記載のペロブスカイト化合物。

[請求項5]
 BにおけるSnとGeとの元素構成割合が、Snが70~99.5%であると共に、Geが0.5~30%であることを特徴とする請求項2又は3記載のペロブスカイト化合物。

[請求項6]
 BにおけるSnとGeとの元素構成割合が、Snが80~99%であると共に、Geが1~20%であることを特徴とする請求項5記載のペロブスカイト化合物。

[請求項7]
 Aが、有機アミン又はアルカリ金属であることを特徴とする請求項1~6のいずれか記載のペロブスカイト化合物。

[請求項8]
 請求項1~7のいずれか記載のペロブスカイト化合物を含有する光吸収層を有することを特徴とする光電変換素子。

[請求項9]
 請求項6記載のペロブスカイト化合物を含有する光吸収層を有することを特徴とする光電変換素子。

[請求項10]
 光吸収層が、正孔輸送層及び電子輸送層の間に設けられていることを特徴とする請求項8又は9記載の光電変換素子。

[請求項11]
 請求項8~10のいずれか記載の光電変換素子を備えることを特徴とする太陽電池。

[請求項12]
 請求項8~10のいずれか記載の光電変換素子を備えることを特徴とする光センサ。
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • KYUSHU INSTITUTE OF TECHNOLOGY
  • Inventor
  • HAYASE Shuzi
  • ITO Nozomi
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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