Synthesis and photovoltaic properties of a low band gap polymer for organic solar cell

Yong Ho Woo, Hyo Sang Lee, Sungnam Park, E. Joon Choi, BongSoo Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We synthesized a low band gap alternating copolymer containing electron-rich units (i.e. dithienosiloles and benzodithiophenes) and electron-deficient units (i.e. difluorobenzothiadiazoles) for high performance organic solar cells. The polymer was prepared by the Stille coupling reaction and characterized using 1H NMR, GPC, TGA, UV-visible absorption spectroscopy, and cyclic voltammetry. Solar cells were fabricated in a structure of ITO/PEDOT:PSS/polymer:PC70BM/Al with five different blending ratios of polymer and PC70BM (1:1.5, 1:2, 1:3, 1:3.5 and 1:4 by weight ratio). The best efficiency was achieved from the 1:3 ratio of polymer and PC70BM in the photoactive layer, and TEM revealed that there is an optimal nanoscale phase separation between polymer and PC70BM in the 1:3 ratio blend film.

Original languageEnglish
Pages (from-to)71-77
Number of pages7
JournalPolymer (Korea)
Volume39
Issue number1
DOIs
Publication statusPublished - 2015 Jan 1

Fingerprint

Polymers
Energy gap
Electrons
Absorption spectroscopy
Phase separation
Cyclic voltammetry
Solar cells
Copolymers
Nuclear magnetic resonance
Organic solar cells
Transmission electron microscopy

Keywords

  • Alternating copolymer
  • Low band gap
  • Organic solar cell
  • Stille coupling reaction

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Synthesis and photovoltaic properties of a low band gap polymer for organic solar cell. / Woo, Yong Ho; Lee, Hyo Sang; Park, Sungnam; Choi, E. Joon; Kim, BongSoo.

In: Polymer (Korea), Vol. 39, No. 1, 01.01.2015, p. 71-77.

Research output: Contribution to journalArticle

Woo, Yong Ho ; Lee, Hyo Sang ; Park, Sungnam ; Choi, E. Joon ; Kim, BongSoo. / Synthesis and photovoltaic properties of a low band gap polymer for organic solar cell. In: Polymer (Korea). 2015 ; Vol. 39, No. 1. pp. 71-77.
@article{8f3fe4c1bdb3496bb1033ef71e3d289e,
title = "Synthesis and photovoltaic properties of a low band gap polymer for organic solar cell",
abstract = "We synthesized a low band gap alternating copolymer containing electron-rich units (i.e. dithienosiloles and benzodithiophenes) and electron-deficient units (i.e. difluorobenzothiadiazoles) for high performance organic solar cells. The polymer was prepared by the Stille coupling reaction and characterized using 1H NMR, GPC, TGA, UV-visible absorption spectroscopy, and cyclic voltammetry. Solar cells were fabricated in a structure of ITO/PEDOT:PSS/polymer:PC70BM/Al with five different blending ratios of polymer and PC70BM (1:1.5, 1:2, 1:3, 1:3.5 and 1:4 by weight ratio). The best efficiency was achieved from the 1:3 ratio of polymer and PC70BM in the photoactive layer, and TEM revealed that there is an optimal nanoscale phase separation between polymer and PC70BM in the 1:3 ratio blend film.",
keywords = "Alternating copolymer, Low band gap, Organic solar cell, Stille coupling reaction",
author = "Woo, {Yong Ho} and Lee, {Hyo Sang} and Sungnam Park and Choi, {E. Joon} and BongSoo Kim",
year = "2015",
month = "1",
day = "1",
doi = "10.7317/pk.2015.39.1.71",
language = "English",
volume = "39",
pages = "71--77",
journal = "Polymer (Korea)",
issn = "0379-153X",
publisher = "Polymer Society of Korea",
number = "1",

}

TY - JOUR

T1 - Synthesis and photovoltaic properties of a low band gap polymer for organic solar cell

AU - Woo, Yong Ho

AU - Lee, Hyo Sang

AU - Park, Sungnam

AU - Choi, E. Joon

AU - Kim, BongSoo

PY - 2015/1/1

Y1 - 2015/1/1

N2 - We synthesized a low band gap alternating copolymer containing electron-rich units (i.e. dithienosiloles and benzodithiophenes) and electron-deficient units (i.e. difluorobenzothiadiazoles) for high performance organic solar cells. The polymer was prepared by the Stille coupling reaction and characterized using 1H NMR, GPC, TGA, UV-visible absorption spectroscopy, and cyclic voltammetry. Solar cells were fabricated in a structure of ITO/PEDOT:PSS/polymer:PC70BM/Al with five different blending ratios of polymer and PC70BM (1:1.5, 1:2, 1:3, 1:3.5 and 1:4 by weight ratio). The best efficiency was achieved from the 1:3 ratio of polymer and PC70BM in the photoactive layer, and TEM revealed that there is an optimal nanoscale phase separation between polymer and PC70BM in the 1:3 ratio blend film.

AB - We synthesized a low band gap alternating copolymer containing electron-rich units (i.e. dithienosiloles and benzodithiophenes) and electron-deficient units (i.e. difluorobenzothiadiazoles) for high performance organic solar cells. The polymer was prepared by the Stille coupling reaction and characterized using 1H NMR, GPC, TGA, UV-visible absorption spectroscopy, and cyclic voltammetry. Solar cells were fabricated in a structure of ITO/PEDOT:PSS/polymer:PC70BM/Al with five different blending ratios of polymer and PC70BM (1:1.5, 1:2, 1:3, 1:3.5 and 1:4 by weight ratio). The best efficiency was achieved from the 1:3 ratio of polymer and PC70BM in the photoactive layer, and TEM revealed that there is an optimal nanoscale phase separation between polymer and PC70BM in the 1:3 ratio blend film.

KW - Alternating copolymer

KW - Low band gap

KW - Organic solar cell

KW - Stille coupling reaction

UR - http://www.scopus.com/inward/record.url?scp=84925446222&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84925446222&partnerID=8YFLogxK

U2 - 10.7317/pk.2015.39.1.71

DO - 10.7317/pk.2015.39.1.71

M3 - Article

AN - SCOPUS:84925446222

VL - 39

SP - 71

EP - 77

JO - Polymer (Korea)

JF - Polymer (Korea)

SN - 0379-153X

IS - 1

ER -