Improvement of efficiency of polymer solar cell by incorporation of the planar shaped monomer in low band gap polymer

Woong Shin; Mi Young Jo; Dae Sung You; Yeon Sook Jeong; Do Y. Yoon; Jae Wook Kang; Jeong Ho Cho; Gun Dae Lee; Seong Soo Hong; Joo Hyun Kim

doi:10.1016/j.synthmet.2012.02.004

Improvement of efficiency of polymer solar cell by incorporation of the planar shaped monomer in low band gap polymer

Woong Shin, Mi Young Jo, Dae Sung You, Yeon Sook Jeong, Do Y. Yoon, Jae Wook Kang, Jeong Ho Cho, Gun Dae Lee, Seong Soo Hong, Joo Hyun Kim

Department of Chemical and Biomolecular Engineering

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

20 Citations (Scopus)

Abstract

A new π-conjugated polymer (PFDTBT-BTBT) with planar core based on 4,7-dithiophen-2-yl-benzo(2,1,3)thiadiazole (BT), [1]benzothieno-[3,2-b][1] benzothiophene (BTBT) and 9,9-didecylfluorene was synthesized by the Suzuki coupling reaction. In order to improve the photovoltaic performance, we introduce planar and rigid shaped BTBT in the polymer backbone. We also synthesized alternating copolymer of 9,9-didecylfluorene and BT (PFDTBT) to compare with optical, electrochemical and photovoltaic properties. The HOMO and LUMO energy levels of PFDTBT-BTBT were -5.67 and -3.75 eV, respectively, which were very similar to those of PFDTBT (-5.65 and -3.75 eV). The power conversion efficiency (PCE) of the device with a structure of ITO/PEDOT:PSS/PFDTBT-BTBT: PCBM (1:3)/Al was 2.08%, which is higher than that of PFDTBT:PCBM (1:3) (1.66%). The root-mean-square (RMS) roughness of PFDTBT-BTBT:PCBM (1:3) blend was 0.820 nm, which was smaller than that of PFDTBT:PCBM (1:3) blend (1.75 nm). PFDTBT-BTBT:PCBM showed smaller domain size and more well-penetrated morphology than PFDTBT:PCBM. The average field-effect hole mobility of the PFDTBT-BTBT was 6.2 × 10 ^-4 cm ²/Vs, much larger than that of PFDTBT (2.3 × 10 ^-4 cm ²/Vs). The results strongly support that polymer solar cell based on PFDTBT-BTBT shows better performance than that of the device based on PFDTBT.

Original language	English
Pages (from-to)	768-774
Number of pages	7
Journal	Synthetic Metals
Volume	162
Issue number	9-10
DOIs	https://doi.org/10.1016/j.synthmet.2012.02.004
Publication status	Published - 2012 Jun

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011-0006807 ) and Converging Research Center Program through the Ministry of Education, Science and Technology ( 2011K000588 ).

All Science Journal Classification (ASJC) codes

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.2012.02.004

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@article{591d7df7759b4de2acf32fb32a2fa211,

title = "Improvement of efficiency of polymer solar cell by incorporation of the planar shaped monomer in low band gap polymer",

abstract = "A new π-conjugated polymer (PFDTBT-BTBT) with planar core based on 4,7-dithiophen-2-yl-benzo(2,1,3)thiadiazole (BT), [1]benzothieno-[3,2-b][1] benzothiophene (BTBT) and 9,9-didecylfluorene was synthesized by the Suzuki coupling reaction. In order to improve the photovoltaic performance, we introduce planar and rigid shaped BTBT in the polymer backbone. We also synthesized alternating copolymer of 9,9-didecylfluorene and BT (PFDTBT) to compare with optical, electrochemical and photovoltaic properties. The HOMO and LUMO energy levels of PFDTBT-BTBT were -5.67 and -3.75 eV, respectively, which were very similar to those of PFDTBT (-5.65 and -3.75 eV). The power conversion efficiency (PCE) of the device with a structure of ITO/PEDOT:PSS/PFDTBT-BTBT: PCBM (1:3)/Al was 2.08%, which is higher than that of PFDTBT:PCBM (1:3) (1.66%). The root-mean-square (RMS) roughness of PFDTBT-BTBT:PCBM (1:3) blend was 0.820 nm, which was smaller than that of PFDTBT:PCBM (1:3) blend (1.75 nm). PFDTBT-BTBT:PCBM showed smaller domain size and more well-penetrated morphology than PFDTBT:PCBM. The average field-effect hole mobility of the PFDTBT-BTBT was 6.2 × 10 -4 cm 2/Vs, much larger than that of PFDTBT (2.3 × 10 -4 cm 2/Vs). The results strongly support that polymer solar cell based on PFDTBT-BTBT shows better performance than that of the device based on PFDTBT.",

author = "Woong Shin and Jo, {Mi Young} and You, {Dae Sung} and Jeong, {Yeon Sook} and Yoon, {Do Y.} and Kang, {Jae Wook} and Cho, {Jeong Ho} and Lee, {Gun Dae} and Hong, {Seong Soo} and Kim, {Joo Hyun}",

note = "Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011-0006807 ) and Converging Research Center Program through the Ministry of Education, Science and Technology ( 2011K000588 ).",

year = "2012",

month = jun,

doi = "10.1016/j.synthmet.2012.02.004",

language = "English",

volume = "162",

pages = "768--774",

journal = "Synthetic Metals",

issn = "0379-6779",

publisher = "Elsevier BV",

number = "9-10",

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T1 - Improvement of efficiency of polymer solar cell by incorporation of the planar shaped monomer in low band gap polymer

AU - Shin, Woong

AU - Jo, Mi Young

AU - You, Dae Sung

AU - Jeong, Yeon Sook

AU - Yoon, Do Y.

AU - Kang, Jae Wook

AU - Cho, Jeong Ho

AU - Lee, Gun Dae

AU - Hong, Seong Soo

AU - Kim, Joo Hyun

N1 - Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2011-0006807 ) and Converging Research Center Program through the Ministry of Education, Science and Technology ( 2011K000588 ).

PY - 2012/6

Y1 - 2012/6

N2 - A new π-conjugated polymer (PFDTBT-BTBT) with planar core based on 4,7-dithiophen-2-yl-benzo(2,1,3)thiadiazole (BT), [1]benzothieno-[3,2-b][1] benzothiophene (BTBT) and 9,9-didecylfluorene was synthesized by the Suzuki coupling reaction. In order to improve the photovoltaic performance, we introduce planar and rigid shaped BTBT in the polymer backbone. We also synthesized alternating copolymer of 9,9-didecylfluorene and BT (PFDTBT) to compare with optical, electrochemical and photovoltaic properties. The HOMO and LUMO energy levels of PFDTBT-BTBT were -5.67 and -3.75 eV, respectively, which were very similar to those of PFDTBT (-5.65 and -3.75 eV). The power conversion efficiency (PCE) of the device with a structure of ITO/PEDOT:PSS/PFDTBT-BTBT: PCBM (1:3)/Al was 2.08%, which is higher than that of PFDTBT:PCBM (1:3) (1.66%). The root-mean-square (RMS) roughness of PFDTBT-BTBT:PCBM (1:3) blend was 0.820 nm, which was smaller than that of PFDTBT:PCBM (1:3) blend (1.75 nm). PFDTBT-BTBT:PCBM showed smaller domain size and more well-penetrated morphology than PFDTBT:PCBM. The average field-effect hole mobility of the PFDTBT-BTBT was 6.2 × 10 -4 cm 2/Vs, much larger than that of PFDTBT (2.3 × 10 -4 cm 2/Vs). The results strongly support that polymer solar cell based on PFDTBT-BTBT shows better performance than that of the device based on PFDTBT.

AB - A new π-conjugated polymer (PFDTBT-BTBT) with planar core based on 4,7-dithiophen-2-yl-benzo(2,1,3)thiadiazole (BT), [1]benzothieno-[3,2-b][1] benzothiophene (BTBT) and 9,9-didecylfluorene was synthesized by the Suzuki coupling reaction. In order to improve the photovoltaic performance, we introduce planar and rigid shaped BTBT in the polymer backbone. We also synthesized alternating copolymer of 9,9-didecylfluorene and BT (PFDTBT) to compare with optical, electrochemical and photovoltaic properties. The HOMO and LUMO energy levels of PFDTBT-BTBT were -5.67 and -3.75 eV, respectively, which were very similar to those of PFDTBT (-5.65 and -3.75 eV). The power conversion efficiency (PCE) of the device with a structure of ITO/PEDOT:PSS/PFDTBT-BTBT: PCBM (1:3)/Al was 2.08%, which is higher than that of PFDTBT:PCBM (1:3) (1.66%). The root-mean-square (RMS) roughness of PFDTBT-BTBT:PCBM (1:3) blend was 0.820 nm, which was smaller than that of PFDTBT:PCBM (1:3) blend (1.75 nm). PFDTBT-BTBT:PCBM showed smaller domain size and more well-penetrated morphology than PFDTBT:PCBM. The average field-effect hole mobility of the PFDTBT-BTBT was 6.2 × 10 -4 cm 2/Vs, much larger than that of PFDTBT (2.3 × 10 -4 cm 2/Vs). The results strongly support that polymer solar cell based on PFDTBT-BTBT shows better performance than that of the device based on PFDTBT.

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Improvement of efficiency of polymer solar cell by incorporation of the planar shaped monomer in low band gap polymer

Abstract

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