Light-absorbing material containing compound with perovskite structure and solar cell including the same

Patent metadata

Field	Value
Publication number	US-11328876-B2
Application number	US-201816035597-A
Country	US
Kind code	B2
Filing date	Jul 14, 2018
Priority date	Jul 20, 2017
Publication date	May 10, 2022
Grant date	May 10, 2022

Abstract

A light-absorbing material contains a compound represented by the composition formula HC(NH2)2SnI3 and having a perovskite structure. A solid-state 1H-NMR spectrum, which is obtained by 1H-14N HMQC measurement in two-dimensional NMR at 25° C., of the compound includes a first peak at 6.9 ppm and a second peak at 7.0 ppm. A peak intensity of the first peak is equal to 80% or more of a peak intensity of the second peak.

First claim

What is claimed is:

1. A light-absorbing material comprising:
a compound represented by a composition formula HC(NH 2 ) 2 SnI 3 and comprising a perovskite crystal structure in which an organic molecule in the perovskite crystal structure is provided in a metastable bonding state, the compound being produced by inverse temperature crystallization using γ-valerolactone as a solvent, wherein:
a solid-state 1 H-NMR spectrum, which is obtained by 1 H- 14 N HMQC measurement in two-dimensional NMR at 25° C., of the compound includes a first peak at 6.9 ppm and a second peak at 7.0 ppm, and
a peak intensity of the first peak is equal to 80% or more of a peak intensity of the second peak.

2. The light-absorbing material according to claim 1 , wherein:
the compound contains crystals, and
the crystals have the same orientation.

3. A solar cell comprising:
a first electrode;
a second electrode facing the first electrode; and
a light-absorbing layer that is disposed between the first electrode and the second electrode and generates electric charges by photoelectric conversion, wherein:
at least one electrode selected from the group consisting of the first electrode and the second electrode is light-transmissive,
the light-absorbing layer contains a light-absorbing material,
the light-absorbing material contains a compound represented by a composition formula HC(NH 2 ) 2 SnI 3 and comprising a perovskite crystal structure in which an organic molecule in the perovskite crystal structure is provided in a metastable bonding state, the compound being produced by inverse temperature crystallization using γ-valerolactone as a solvent,
a solid-state 1 H-NMR spectrum, which is obtained by 1 H- 14 N HMQC measurement in two-dimensional NMR at 25° C., of the compound includes a first peak at 6.9 ppm and a second peak at 7.0 ppm, and
a peak intensity of the first peak is equal to 80% or more of a peak intensity of the second peak.

4. A light-absorbing material comprising:
a compound represented by a composition formula HC(NH 2 ) 2 SnI 3 , comprising a perovskite crystal structure in which an organic molecule in the perovskite crystal structure is provided in a metastable bonding state, the compound being produced by inverse temperature crystallization using γ-valerolactone as a solvent, and having a spin-lattice relaxation time T 1 of 33 seconds or more and 45 seconds or less at 25° C. as measured by solid-state 1 H-NMR spectroscopy.

5. The light-absorbing material according to claim 4 , wherein
the compound contains crystals, and
the crystals have the same orientation.

6. A solar cell comprising:
a first electrode;
a second electrode facing the first electrode; and
a light-absorbing layer that is disposed between the first electrode and the second electrode and generates electric charges by photoelectric conversion, wherein:
at least one electrode selected from the group consisting of the first electrode and the second electrode is light-transmissive,
the light-absorbing layer contains a light-absorbing material, and
the light-absorbing material contains a compound represented by a composition formula HC(NH 2 ) 2 SnI 3 , comprising a perovskite crystal structure in which an organic molecule in the perovskite crystal structure is provided in a metastable bonding state, the compound being produced by inverse temperature crystallization using γ-valerolactone as a solvent, and having a spin-lattice relaxation time T 1 of 33 seconds or more and 45 seconds or less at 25° C. as measured by solid-state 1 H-NMR spectroscopy.

7. A light-absorbing material comprising:
a compound represented by a composition formula HC(NH 2 ) 2 SnI 3 and comprising a perovskite crystal structure in which an organic molecule in the perovskite crystal structure is provided in a metastable bonding state, the compound being produced by inverse temperature crystallization using γ-valerolactone as a solvent, wherein:
a fluorescence spectrum of the compound has a peak in a range of 1.33 eV or more and 1.39 eV or less.

8. The light-absorbing material according to claim 7 , wherein
the compound contains crystals, and
the crystals have the same orientation.

9. A solar cell comprising:
a first electrode;
a second electrode facing the first electrode; and
a light-absorbing layer that is disposed between the first electrode and the second electrode and generates electric charges by photoelectric conversion, wherein:
at least one electrode selected from the group consisting of the first electrode and the second electrode is light-transmissive,
the light-absorbing layer contains a light-absorbing material,
the light-absorbing material contains a compound represented by a composition formula HC(NH 2 ) 2 SnI 3 and comprising a perovskite crystal structure in which an organic molecule in the perovskite crystal structure is provided in a metastable bonding state, the compound being produced by inverse temperature crystallization using γ-valerolactone as a solvent, and
a fluorescence spectrum of the compound has a peak in a range of 1.33 eV or more and 1.39 eV or less.

10. The light-absorbing material according to claim 1 , wherein
the compound has a bandgap in a range of 1.33 eV or more and 1.39 eV or less at 25° C.

11. The light-absorbing material according to claim 4 , wherein
the compound has a bandgap in a range of 1.33 eV or more and 1.39 eV or less at 25° C.

12. The light-absorbing material according to claim 7 , wherein
the compound has a bandgap in a range of 1.33 eV or more and 1.39 eV or less at 25° C.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Sekimoto Takeyuki
• Suzuka Michio
• Yokoyama Tomoyasu
• Miyamoto Yoshiko
• Matsui Taisuke

Classifications

• H10K85/50

  Organic perovskites; Hybrid organic-inorganic perovskites [HOIP], e.g. CH3NH3PbI3 · CPC title

• H01G9/2059 Primary

  comprising an organic dye as the active light absorbing material, e.g. adsorbed on an electrode or dissolved in solution · CPC title

• C07F7/2204 Primary

  Not belonging to the groups C07F7/2208 - C07F7/2296 · CPC title

• H01L2251/308

  Electricity · mapped topic

• H01L51/005

  Electricity · mapped topic