Drastic change of molecular orientation in a thiazolothiazole copolymer by molecular-weight control and blending with PC 61BM leads to high efficiencies in solar cells

Itaru Osaka, Masahiko Saito, Hiroki Mori, Tomoyuki Koganezawa, Kazuo Takimiya

Research output: Contribution to journalArticle

123 Citations (Scopus)

Abstract

A thiazolothiazole-thiophene copolymer is examined as the active material in bulk heterojunction (BHJ) solar cells. By optimizing the molecular weight, the polymer-based cells exhibit power conversion efficiencies as high as 5.7%. The increase in molecular weight improves the orientational order, and blending with phenyl-C61-butyric acid methyl ester (PC 61BM) changes the orientational motif from edge-on to face-on, which accounts for the trend in photovoltaic performances. These results might give new insight into the structure-property relationships in BHJ solar cells.

Original languageEnglish
Pages (from-to)425-430
Number of pages6
JournalAdvanced Materials
Volume24
Issue number3
DOIs
Publication statusPublished - Jan 17 2012
Externally publishedYes

Fingerprint

Weight control
Butyric acid
Butyric Acid
Molecular orientation
Heterojunctions
Solar cells
Esters
Copolymers
Molecular weight
Thiophenes
Thiophene
Conversion efficiency
Polymers

Keywords

  • bulk heterojunctions
  • molecular orientation
  • semiconducting polymers
  • solar cells
  • thiazolothiazole

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Drastic change of molecular orientation in a thiazolothiazole copolymer by molecular-weight control and blending with PC 61BM leads to high efficiencies in solar cells. / Osaka, Itaru; Saito, Masahiko; Mori, Hiroki; Koganezawa, Tomoyuki; Takimiya, Kazuo.

In: Advanced Materials, Vol. 24, No. 3, 17.01.2012, p. 425-430.

Research output: Contribution to journalArticle

@article{7bf418a88171450fb81e5c288a68d214,
title = "Drastic change of molecular orientation in a thiazolothiazole copolymer by molecular-weight control and blending with PC 61BM leads to high efficiencies in solar cells",
abstract = "A thiazolothiazole-thiophene copolymer is examined as the active material in bulk heterojunction (BHJ) solar cells. By optimizing the molecular weight, the polymer-based cells exhibit power conversion efficiencies as high as 5.7{\%}. The increase in molecular weight improves the orientational order, and blending with phenyl-C61-butyric acid methyl ester (PC 61BM) changes the orientational motif from edge-on to face-on, which accounts for the trend in photovoltaic performances. These results might give new insight into the structure-property relationships in BHJ solar cells.",
keywords = "bulk heterojunctions, molecular orientation, semiconducting polymers, solar cells, thiazolothiazole",
author = "Itaru Osaka and Masahiko Saito and Hiroki Mori and Tomoyuki Koganezawa and Kazuo Takimiya",
year = "2012",
month = "1",
day = "17",
doi = "10.1002/adma.201103065",
language = "English",
volume = "24",
pages = "425--430",
journal = "Advanced Materials",
issn = "0935-9648",
publisher = "Wiley-VCH Verlag",
number = "3",

}

TY - JOUR

T1 - Drastic change of molecular orientation in a thiazolothiazole copolymer by molecular-weight control and blending with PC 61BM leads to high efficiencies in solar cells

AU - Osaka, Itaru

AU - Saito, Masahiko

AU - Mori, Hiroki

AU - Koganezawa, Tomoyuki

AU - Takimiya, Kazuo

PY - 2012/1/17

Y1 - 2012/1/17

N2 - A thiazolothiazole-thiophene copolymer is examined as the active material in bulk heterojunction (BHJ) solar cells. By optimizing the molecular weight, the polymer-based cells exhibit power conversion efficiencies as high as 5.7%. The increase in molecular weight improves the orientational order, and blending with phenyl-C61-butyric acid methyl ester (PC 61BM) changes the orientational motif from edge-on to face-on, which accounts for the trend in photovoltaic performances. These results might give new insight into the structure-property relationships in BHJ solar cells.

AB - A thiazolothiazole-thiophene copolymer is examined as the active material in bulk heterojunction (BHJ) solar cells. By optimizing the molecular weight, the polymer-based cells exhibit power conversion efficiencies as high as 5.7%. The increase in molecular weight improves the orientational order, and blending with phenyl-C61-butyric acid methyl ester (PC 61BM) changes the orientational motif from edge-on to face-on, which accounts for the trend in photovoltaic performances. These results might give new insight into the structure-property relationships in BHJ solar cells.

KW - bulk heterojunctions

KW - molecular orientation

KW - semiconducting polymers

KW - solar cells

KW - thiazolothiazole

UR - http://www.scopus.com/inward/record.url?scp=84855668640&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84855668640&partnerID=8YFLogxK

U2 - 10.1002/adma.201103065

DO - 10.1002/adma.201103065

M3 - Article

AN - SCOPUS:84855668640

VL - 24

SP - 425

EP - 430

JO - Advanced Materials

JF - Advanced Materials

SN - 0935-9648

IS - 3

ER -