Photoelectric conversion element and photoelectric conversion module

Patent metadata

Field	Value
Publication number	US-9208956-B2
Application number	US-201214111392-A
Country	US
Kind code	B2
Filing date	Apr 6, 2012
Priority date	Apr 14, 2011
Publication date	Dec 8, 2015
Grant date	Dec 8, 2015

Abstract

A light transmitting substrate having at least a light receiving surface, a first electrode located on the light transmitting substrate, a collector electrode located on at least a part of the first electrode and formed from a metal thin film, a photoelectric conversion portion located on an upper surface of the first electrode or the collector electrode, carrying a photosensitizer, and immersed in a carrier transport material, an insulating frame portion surrounding sides of the photoelectric conversion portion, and a second electrode located to be opposed to the first electrode above the photoelectric conversion portion are provided. Relation of Isc×Rh<0.05×Voc is satisfied, where Isc represents a short-circuit current value of a dye-sensitized solar cell, Rh represents a total value of electrical resistance values of the collector electrode, the first electrode, and the second electrode, and Voc represents an open circuit voltage value of the dye-sensitized solar cell.

First claim

The invention claimed is:

1. A photoelectric conversion element, comprising:
a substrate having at least a light receiving surface;
a first electrode formed from a transparent conductive film located on said substrate;
a collector electrode located on at least a part of said first electrode and formed from a metal thin film;
a photoelectric conversion portion located on an upper surface of said first electrode or said collector electrode, carrying a photosensitizer, and immersed in a carrier transport material;
an insulating frame portion surrounding sides of said photoelectric conversion portion; and
a second electrode located to be opposed to said first electrode above said photoelectric conversion portion,
relation of Isc×Rh<0.05 ×Voc being satisfied, where Isc (A) represents a short-circuit current value of said photoelectric conversion element, Rh (Ω) represents a total value of electrical resistance values of said collector electrode, said first electrode, and said second electrode, and Voc (V) represents an open circuit voltage value of said photoelectric conversion element;
the photoelectric conversion portion has a rectangular shape having a longitudinal direction in a plan view;
the photoelectric conversion portion has a width in a direction orthogonal to the longitudinal direction, not smaller than 5 mm and not greater than 10 mm; and
Isc and Rh satisfy the relation of 0.03×Voc<Rh×Isc<0.05×Voc.

2. A photoelectric conversion module, comprising a plurality of photoelectric conversion elements according to claim 1 ,
said plurality of photoelectric conversion elements being electrically connected in series, and
in said photoelectric conversion elements electrically connected to each other, said first electrode or said collector electrode of one said photoelectric conversion element being connected to said second electrode of the other said photoelectric conversion element.

3. The photoelectric conversion module according to claim 2 , wherein
said collector electrode extends in a direction in which said photoelectric conversion elements connected in series are aligned.

4. The photoelectric conversion module according to claim 2 , wherein
said photoelectric conversion portion has a rectangular shape having a longitudinal direction in a plan view, and
said photoelectric conversion elements connected in series are located such that said longitudinal directions of said photoelectric conversion portions are substantially in parallel to each other.

5. The photoelectric conversion module according to claim 4 , wherein
said photoelectric conversion portion has a length in said longitudinal direction not smaller than 10 mm.

6. The photoelectric conversion module according to claim 4 , wherein
said photoelectric conversion portion has a width in a direction orthogonal to said longitudinal direction, not smaller than 5 mm and not greater than 10 mm.

7. The photoelectric conversion module according to claim 3 , wherein
said collector electrode has parallel portions extending substantially in parallel at an interval not smaller than 5 mm and not greater than 10 mm in a direction orthogonal to a direction of extension.

8. The photoelectric conversion module according to claim 7 , wherein
aid parallel portion has a width not smaller than 0.1 mm and not greater than 0.6 mm.

9. The photoelectric conversion module according to claim 2 , wherein
said collector electrode is formed of a material having corrosion resistance to said carrier transport material.

10. The photoelectric conversion module according to claim 9 , wherein said collector electrode is formed of any of titanium, nickel, and tantalum.

Assignees

• Fukui Atsushi
• Komiya Ryoichi
• Yamanaka Ryosuke
• Sharp Kk

Inventors

• Fukui Atsushi
• Komiya Ryoichi
• Yamanaka Ryosuke

Classifications

• H01G9/2081 Primary

  Serial interconnection of cells · CPC title

• H01G9/2059

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

• H01G9/2022 Primary

  characterized by he counter electrode · CPC title

• H01G9/2031

  comprising titanium oxide, e.g. TiO2 (H01G9/2036 takes precedence) · CPC title

• Y02E10/542

  Dye sensitized solar cells · CPC title