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

doi:10.1016/j.synthmet.2012.03.007

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 journal › Article › peer-review

13 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 language	English
Pages (from-to)	813-819
Number of pages	7
Journal	Synthetic Metals
Volume	162
Issue number	9-10
DOIs	https://doi.org/10.1016/j.synthmet.2012.03.007
Publication status	Published - 2012 Jun

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) grant funded by the Ministry of Education, Science and Technology ( 20110003500 , 20110018396 , R0A-2007-000-20053-0 and 2009-8950 ). The TJ Park doctoral Fellowship funded by POSCO TJ Park Foundation also supported this work. We would like to give our thanks for supporting measurements by the Research Institute of Advanced Materials (RIAM), Seoul National University, and Solar Cell Research Center, Korea Institute of Science and Technology (KIST).

Keywords

Light absorption
Organic solar cell
Photovoltaic characteristics
Zn-porphyrin derivatives

ASJC Scopus subject areas

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.synthmet.2012.03.007

Cite this

@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",

note = "Funding Information: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) grant funded by the Ministry of Education, Science and Technology ( 20110003500 , 20110018396 , R0A-2007-000-20053-0 and 2009-8950 ). The TJ Park doctoral Fellowship funded by POSCO TJ Park Foundation also supported this work. We would like to give our thanks for supporting measurements by the Research Institute of Advanced Materials (RIAM), Seoul National University, and Solar Cell Research Center, Korea Institute of Science and Technology (KIST). ",

year = "2012",

month = jun,

doi = "10.1016/j.synthmet.2012.03.007",

language = "English",

volume = "162",

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journal = "Synthetic Metals",

issn = "0379-6779",

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AU - Cho, Eun Hei

AU - Chae, Seung Hyun

AU - Kim, Kihyun

AU - Lee, Suk Joong

AU - Joo, Jinsoo

N1 - Funding Information: This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) grant funded by the Ministry of Education, Science and Technology ( 20110003500 , 20110018396 , R0A-2007-000-20053-0 and 2009-8950 ). The TJ Park doctoral Fellowship funded by POSCO TJ Park Foundation also supported this work. We would like to give our thanks for supporting measurements by the Research Institute of Advanced Materials (RIAM), Seoul National University, and Solar Cell Research Center, Korea Institute of Science and Technology (KIST).

PY - 2012/6

Y1 - 2012/6

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

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U2 - 10.1016/j.synthmet.2012.03.007

DO - 10.1016/j.synthmet.2012.03.007

M3 - Article

AN - SCOPUS:84859928120

SN - 0379-6779

VL - 162

SP - 813

EP - 819

JO - Synthetic Metals

JF - Synthetic Metals

IS - 9-10

ER -

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

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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