Perovskite solar cell

Patent metadata

Field	Value
Publication number	US-2016359119-A1
Application number	US-201615163675-A
Country	US
Kind code	A1
Filing date	May 25, 2016
Priority date	Jun 4, 2015
Publication date	Dec 8, 2016
Grant date	—

Abstract

A perovskite solar cell includes a first electrode; an electron transport layer on the first electrode, containing a semiconductor; a light-absorbing layer on the electron transport layer, containing a perovskite compound represented by a compositional formula ABX 3 where A represents a monovalent cation, B represents a divalent cation, and X represents a halogen anion; a hole transport layer on the light-absorbing layer, containing a hole transport material including a redox moiety, and a second electrode on the hole transport layer. The hole transport layer satisfies 0.1≦100C/(C+D)≦1.1, where C represents a number of moles of the redox moiety in an oxidized state in the hole transport layer, and D represents a number of moles of the redox moiety in a reduced state in the hole transport layer.

First claim

What is claimed is:

1 . A perovskite solar cell comprising:
a first electrode; an electron transport layer on the first electrode, containing a semiconductor; a light-absorbing layer on the electron transport layer, containing a perovskite compound represented by a compositional formula ABX 3 where A represents a monovalent cation, B represents a divalent cation, and X represents a halogen anion; a hole transport layer on the light-absorbing layer, containing a hole transport material including a redox moiety, and a second electrode on the hole transport layer, wherein the hole transport layer satisfies
0.1≦100 C /( C+D )≦1.1   (1)

where C represents a number of moles of the redox moiety in an oxidized state in the hole transport layer, and D represents a number of moles of the redox moiety in a reduced state in the hole transport layer.

2 . The perovskite solar cell according to claim 1 , wherein the monovalent cation includes at least one cation selected from the group consisting of a methylammonium cation and a formamidinium cation.

3 . The perovskite solar cell according to claim 1 , wherein the divalent cation includes at least one cation selected from the group consisting of Pb 2+ , Ge 2+ , and Sn 2+ .

4 . The perovskite solar cell according to claim 1 , wherein the hole transport material includes an aromatic amine derivative represented by Chemical Formula below

where Ar 1 , Ar 2 , and Ar 3 each independently represent one of a substituted aryl group, unsubstituted aryl group, a substituted heteroaryl group, a unsubstituted heteroaryl group, a substituted heterocyclic group, and a substituted heterocyclic group.

5 . The perovskite solar cell according to claim 4 , wherein at least two of Ar 1 , Ar 2 , and Ar 3 are linked together to form a ring structure.

6 . The perovskite solar cell according to claim 1 , further comprising a porous layer between the electron transport layer and the light-absorbing layer, containing a porous material.

7 . The perovskite solar cell according to claim 1 , wherein the hole transport layer contains a cobalt complex.

Assignees

• Panasonic Corp

Inventors

• Hayashi Naoki
• Suzuka Michio

Classifications

• Y02E10/549

  Organic PV cells · CPC title

• H10K85/50

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

• H10K30/50

  Photovoltaic [PV] devices · CPC title

• H10K30/151

  the wide bandgap semiconductor comprising titanium oxide, e.g. TiO2 · CPC title

• H01L51/447

  Electricity · mapped topic