Photovoltaic characteristics of organic solar cells using Zn-porphyrin derivatives with controlled π-conjugation structures

Eun Hei Cho, Seung Hyun Chae, Kihyun Kim, Suk Joong Lee, Jinsoo Joo

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We demonstrate the variation of the photovoltaic effect depending on the π-conjugation length using organic photovoltaic cells (OPVCs), which contain Zn-tertrakisthiopheneporphyrins (TTP1, TTP2 and TTP3) decorated with thiophene units. For the realization of full a π-conjugation system, the Zn-bisthiopheneporphyrins (BTP1 and BTP2) were synthesized by replacing phenyl linkers with ethynyl ones between the porphyrin framework and the thiophenes. The light-absorption characteristics were gradually changed by extending the thiophene units of the TTPs and enhanced Q-band intensity at about 700 nm was observed for BTPs. We fabricated OPVCs using TTPs and BTPs and measured the current density-voltage (J-V) curves and the spectral responses of photocurrent. To study the transport of charge carriers in active materials, the exciton generation rate and dissociation probability were analyzed. The crystallinity of the π-conjugated donor material plays an important role in charge generation, and the planarity of the porphyrin derivatives can improve the power conversion efficiency (PCE) of OPVCs. Based on the results, for the improvement of the PCE of OPVCs, key factors of the design strategy for the donor molecules were investigated and suggested.

Original languageEnglish
Pages (from-to)813-819
Number of pages7
JournalSynthetic Metals
Volume162
Issue number9-10
DOIs
Publication statusPublished - 2012 Jun 1

Fingerprint

Photovoltaic cells
photovoltaic cells
Porphyrins
conjugation
porphyrins
Thiophenes
Thiophene
solar cells
thiophenes
Derivatives
Conversion efficiency
donor materials
Photovoltaic effects
photovoltaic effect
electromagnetic absorption
Charge carriers
Photocurrents
spectral sensitivity
Excitons
Light absorption

Keywords

  • Light absorption
  • Organic solar cell
  • Photovoltaic characteristics
  • Zn-porphyrin derivatives

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Photovoltaic characteristics of organic solar cells using Zn-porphyrin derivatives with controlled π-conjugation structures. / Cho, Eun Hei; Chae, Seung Hyun; Kim, Kihyun; Lee, Suk Joong; Joo, Jinsoo.

In: Synthetic Metals, Vol. 162, No. 9-10, 01.06.2012, p. 813-819.

Research output: Contribution to journalArticle

@article{f45d726ea50f4b3584d56be6d2c6e898,
title = "Photovoltaic characteristics of organic solar cells using Zn-porphyrin derivatives with controlled π-conjugation structures",
abstract = "We demonstrate the variation of the photovoltaic effect depending on the π-conjugation length using organic photovoltaic cells (OPVCs), which contain Zn-tertrakisthiopheneporphyrins (TTP1, TTP2 and TTP3) decorated with thiophene units. For the realization of full a π-conjugation system, the Zn-bisthiopheneporphyrins (BTP1 and BTP2) were synthesized by replacing phenyl linkers with ethynyl ones between the porphyrin framework and the thiophenes. The light-absorption characteristics were gradually changed by extending the thiophene units of the TTPs and enhanced Q-band intensity at about 700 nm was observed for BTPs. We fabricated OPVCs using TTPs and BTPs and measured the current density-voltage (J-V) curves and the spectral responses of photocurrent. To study the transport of charge carriers in active materials, the exciton generation rate and dissociation probability were analyzed. The crystallinity of the π-conjugated donor material plays an important role in charge generation, and the planarity of the porphyrin derivatives can improve the power conversion efficiency (PCE) of OPVCs. Based on the results, for the improvement of the PCE of OPVCs, key factors of the design strategy for the donor molecules were investigated and suggested.",
keywords = "Light absorption, Organic solar cell, Photovoltaic characteristics, Zn-porphyrin derivatives",
author = "Cho, {Eun Hei} and Chae, {Seung Hyun} and Kihyun Kim and Lee, {Suk Joong} and Jinsoo Joo",
year = "2012",
month = "6",
day = "1",
doi = "10.1016/j.synthmet.2012.03.007",
language = "English",
volume = "162",
pages = "813--819",
journal = "Synthetic Metals",
issn = "0379-6779",
publisher = "Elsevier BV",
number = "9-10",

}

TY - JOUR

T1 - Photovoltaic characteristics of organic solar cells using Zn-porphyrin derivatives with controlled π-conjugation structures

AU - Cho, Eun Hei

AU - Chae, Seung Hyun

AU - Kim, Kihyun

AU - Lee, Suk Joong

AU - Joo, Jinsoo

PY - 2012/6/1

Y1 - 2012/6/1

N2 - We demonstrate the variation of the photovoltaic effect depending on the π-conjugation length using organic photovoltaic cells (OPVCs), which contain Zn-tertrakisthiopheneporphyrins (TTP1, TTP2 and TTP3) decorated with thiophene units. For the realization of full a π-conjugation system, the Zn-bisthiopheneporphyrins (BTP1 and BTP2) were synthesized by replacing phenyl linkers with ethynyl ones between the porphyrin framework and the thiophenes. The light-absorption characteristics were gradually changed by extending the thiophene units of the TTPs and enhanced Q-band intensity at about 700 nm was observed for BTPs. We fabricated OPVCs using TTPs and BTPs and measured the current density-voltage (J-V) curves and the spectral responses of photocurrent. To study the transport of charge carriers in active materials, the exciton generation rate and dissociation probability were analyzed. The crystallinity of the π-conjugated donor material plays an important role in charge generation, and the planarity of the porphyrin derivatives can improve the power conversion efficiency (PCE) of OPVCs. Based on the results, for the improvement of the PCE of OPVCs, key factors of the design strategy for the donor molecules were investigated and suggested.

AB - We demonstrate the variation of the photovoltaic effect depending on the π-conjugation length using organic photovoltaic cells (OPVCs), which contain Zn-tertrakisthiopheneporphyrins (TTP1, TTP2 and TTP3) decorated with thiophene units. For the realization of full a π-conjugation system, the Zn-bisthiopheneporphyrins (BTP1 and BTP2) were synthesized by replacing phenyl linkers with ethynyl ones between the porphyrin framework and the thiophenes. The light-absorption characteristics were gradually changed by extending the thiophene units of the TTPs and enhanced Q-band intensity at about 700 nm was observed for BTPs. We fabricated OPVCs using TTPs and BTPs and measured the current density-voltage (J-V) curves and the spectral responses of photocurrent. To study the transport of charge carriers in active materials, the exciton generation rate and dissociation probability were analyzed. The crystallinity of the π-conjugated donor material plays an important role in charge generation, and the planarity of the porphyrin derivatives can improve the power conversion efficiency (PCE) of OPVCs. Based on the results, for the improvement of the PCE of OPVCs, key factors of the design strategy for the donor molecules were investigated and suggested.

KW - Light absorption

KW - Organic solar cell

KW - Photovoltaic characteristics

KW - Zn-porphyrin derivatives

UR - http://www.scopus.com/inward/record.url?scp=84859928120&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84859928120&partnerID=8YFLogxK

U2 - 10.1016/j.synthmet.2012.03.007

DO - 10.1016/j.synthmet.2012.03.007

M3 - Article

VL - 162

SP - 813

EP - 819

JO - Synthetic Metals

JF - Synthetic Metals

SN - 0379-6779

IS - 9-10

ER -