Improved performance of non-fullerene polymer solar cells by simple structural change of asymmetric acceptor based on indenothiophene

Cheol Hun Jeong; Young Un Kim; Chang Geun Park; Suna Choi; Min Ju Cho; Dong Hoon Choi

doi:10.1016/j.synthmet.2018.10.014

Improved performance of non-fullerene polymer solar cells by simple structural change of asymmetric acceptor based on indenothiophene

Cheol Hun Jeong, Young Un Kim, Chang Geun Park, Suna Choi, Min Ju Cho^*, Dong Hoon Choi

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

In this study, we have synthesized a new asymmetric n-type semiconducting molecule (Me-ITBD) by combining 4,4-bis(4-hexylphenyl)-7-methyl-6-(thiophen-2-yl)-4H-indeno[1,2-b]thiophene with 2-(benzo[c][1,2,5]-thiadiazol-4-yl methylene)-malononitrile and applied it to polymer solar cells. Compared to the PhITBD acceptor without methyl substituent in the 7-position of the core, Me-ITBD showed a larger torsional angle between thiophene and indenothiophene. Non-fullerene polymer solar cells (PSCs) with the methyl-substituted asymmetric acceptor Me-ITBD displayed an enhanced power conversion efficiency (PCE) of 5.75%, compared to the PSC (PCE = 1.79%) based on a PhITBD acceptor. The higher PCE value of the Me-ITBD-based PSC was ascribed to its improved device parameters, i.e. the J_sc and FF, induced by a favorable fine morphology in the active layer. By simply introducing a methyl substituent in the indenothiophene unit of the PhITBD acceptor, the PSC performance was enhanced.

Original language	English
Pages (from-to)	164-171
Number of pages	8
Journal	Synthetic Metals
Volume	246
DOIs	https://doi.org/10.1016/j.synthmet.2018.10.014
Publication status	Published - 2018 Dec

Bibliographical note

Funding Information:
We would like to thank the National Research Foundation of Korea ( NRF2018R1D1A1B07042533 , NRF20100020209 ) for their support in carrying out this study.

Publisher Copyright:
© 2018 Elsevier B.V.

Keywords

Acceptor
Asymmetric structure
Indenothiophene
Methyl substituent
Polymer solar cell
Power conversion efficiency

ASJC Scopus subject areas

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

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10.1016/j.synthmet.2018.10.014

Cite this

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title = "Improved performance of non-fullerene polymer solar cells by simple structural change of asymmetric acceptor based on indenothiophene",

abstract = "In this study, we have synthesized a new asymmetric n-type semiconducting molecule (Me-ITBD) by combining 4,4-bis(4-hexylphenyl)-7-methyl-6-(thiophen-2-yl)-4H-indeno[1,2-b]thiophene with 2-(benzo[c][1,2,5]-thiadiazol-4-yl methylene)-malononitrile and applied it to polymer solar cells. Compared to the PhITBD acceptor without methyl substituent in the 7-position of the core, Me-ITBD showed a larger torsional angle between thiophene and indenothiophene. Non-fullerene polymer solar cells (PSCs) with the methyl-substituted asymmetric acceptor Me-ITBD displayed an enhanced power conversion efficiency (PCE) of 5.75\%, compared to the PSC (PCE = 1.79\%) based on a PhITBD acceptor. The higher PCE value of the Me-ITBD-based PSC was ascribed to its improved device parameters, i.e. the Jsc and FF, induced by a favorable fine morphology in the active layer. By simply introducing a methyl substituent in the indenothiophene unit of the PhITBD acceptor, the PSC performance was enhanced.",

keywords = "Acceptor, Asymmetric structure, Indenothiophene, Methyl substituent, Polymer solar cell, Power conversion efficiency",

author = "Jeong, \{Cheol Hun\} and Kim, \{Young Un\} and Park, \{Chang Geun\} and Suna Choi and Cho, \{Min Ju\} and Choi, \{Dong Hoon\}",

note = "Funding Information: We would like to thank the National Research Foundation of Korea ( NRF2018R1D1A1B07042533 , NRF20100020209 ) for their support in carrying out this study. Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

year = "2018",

month = dec,

doi = "10.1016/j.synthmet.2018.10.014",

language = "English",

volume = "246",

pages = "164--171",

journal = "Synthetic Metals",

issn = "0379-6779",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Improved performance of non-fullerene polymer solar cells by simple structural change of asymmetric acceptor based on indenothiophene

AU - Jeong, Cheol Hun

AU - Kim, Young Un

AU - Park, Chang Geun

AU - Choi, Suna

AU - Cho, Min Ju

AU - Choi, Dong Hoon

N1 - Funding Information: We would like to thank the National Research Foundation of Korea ( NRF2018R1D1A1B07042533 , NRF20100020209 ) for their support in carrying out this study. Publisher Copyright: © 2018 Elsevier B.V.

PY - 2018/12

Y1 - 2018/12

N2 - In this study, we have synthesized a new asymmetric n-type semiconducting molecule (Me-ITBD) by combining 4,4-bis(4-hexylphenyl)-7-methyl-6-(thiophen-2-yl)-4H-indeno[1,2-b]thiophene with 2-(benzo[c][1,2,5]-thiadiazol-4-yl methylene)-malononitrile and applied it to polymer solar cells. Compared to the PhITBD acceptor without methyl substituent in the 7-position of the core, Me-ITBD showed a larger torsional angle between thiophene and indenothiophene. Non-fullerene polymer solar cells (PSCs) with the methyl-substituted asymmetric acceptor Me-ITBD displayed an enhanced power conversion efficiency (PCE) of 5.75%, compared to the PSC (PCE = 1.79%) based on a PhITBD acceptor. The higher PCE value of the Me-ITBD-based PSC was ascribed to its improved device parameters, i.e. the Jsc and FF, induced by a favorable fine morphology in the active layer. By simply introducing a methyl substituent in the indenothiophene unit of the PhITBD acceptor, the PSC performance was enhanced.

AB - In this study, we have synthesized a new asymmetric n-type semiconducting molecule (Me-ITBD) by combining 4,4-bis(4-hexylphenyl)-7-methyl-6-(thiophen-2-yl)-4H-indeno[1,2-b]thiophene with 2-(benzo[c][1,2,5]-thiadiazol-4-yl methylene)-malononitrile and applied it to polymer solar cells. Compared to the PhITBD acceptor without methyl substituent in the 7-position of the core, Me-ITBD showed a larger torsional angle between thiophene and indenothiophene. Non-fullerene polymer solar cells (PSCs) with the methyl-substituted asymmetric acceptor Me-ITBD displayed an enhanced power conversion efficiency (PCE) of 5.75%, compared to the PSC (PCE = 1.79%) based on a PhITBD acceptor. The higher PCE value of the Me-ITBD-based PSC was ascribed to its improved device parameters, i.e. the Jsc and FF, induced by a favorable fine morphology in the active layer. By simply introducing a methyl substituent in the indenothiophene unit of the PhITBD acceptor, the PSC performance was enhanced.

KW - Acceptor

KW - Asymmetric structure

KW - Indenothiophene

KW - Methyl substituent

KW - Polymer solar cell

KW - Power conversion efficiency

UR - https://www.scopus.com/pages/publications/85055521630

U2 - 10.1016/j.synthmet.2018.10.014

DO - 10.1016/j.synthmet.2018.10.014

M3 - Article

AN - SCOPUS:85055521630

SN - 0379-6779

VL - 246

SP - 164

EP - 171

JO - Synthetic Metals

JF - Synthetic Metals

ER -

Improved performance of non-fullerene polymer solar cells by simple structural change of asymmetric acceptor based on indenothiophene

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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