Diketopyrrolopyrrole-based small molecule for application in solution processed organic solar cells

Mi Young Jo; Jong Hyun Park; Gyeong Eun Lim; Jeong Ho Cho; Seong Soo Park; Seong Soo Hong; Joo Hyun Kim

doi:10.1080/15421406.2014.933382

Diketopyrrolopyrrole-based small molecule for application in solution processed organic solar cells

Mi Young Jo, Jong Hyun Park, Gyeong Eun Lim, Jeong Ho Cho, Seong Soo Park, Seong Soo Hong, Joo Hyun Kim

Department of Chemical and Biomolecular Engineering

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

2 Citations (Scopus)

Abstract

A novel donor-π bridge - acceptor (A)-π bridge - donor type molecule (PCTDPP20) with planar core based on diketopyrrolopyrrole (DPP) and carbazole is synthesized by the Suzuki coupling reaction. We introduce phenyl rings to extend the π-conjugation length as a π-bridge. The HOMO and LUMO energy levels of PCTDPP20 are -5.13 and -3.57 eV, respectively. From the UV-Vis spectra, we confirm that the maximum absorption wavelgth (λ_max) of the PCTDPP20 annealed film at 100°C is red-shifted about 30 nm and the absorption intensity at 600 ∼ 650 nm increase compared to that of as-spun film. And the OFET based on PCTDPP20 annealed at 100°C exhibits a highest hole mobility of 1.6 × 10^-4 cm²/Vs together with a Ion/Ioff ratio of 1.0 × 104 and a Vth of 14 V. Also, the photovoltaic properties are investigated in the device structure of ITO/PEDOT:PSS/PCTDPP20:PC₆₀BM (with different blend ratios)/Al. Among the OSCs, PCTDPP20:PCBM weight ratio of 1:0.8 and termal annealing process at 100°C for 10 min are optimum belnd ratio and temperature, respectively. This device shows the best performance with a highest PCE of 0.95% a Jsc of -2.69 mA/cm², a Voc of 0.79 V and a fill factor of 44.5%.

Original language	English
Pages (from-to)	111-119
Number of pages	9
Journal	Molecular Crystals and Liquid Crystals
Volume	598
Issue number	1
DOIs	https://doi.org/10.1080/15421406.2014.933382
Publication status	Published - 2014 Jul 24

Bibliographical note

Funding Information:
This work was supported by a Research Grant of Pukyong National University (2013 year).

Publisher Copyright:
Copyright © 2014 Taylor & Francis Group, LLC.

All Science Journal Classification (ASJC) codes

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

UN SDGs

This output contributes to the following Sustainable Development Goal(s)

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title = "Diketopyrrolopyrrole-based small molecule for application in solution processed organic solar cells",

abstract = "A novel donor-π bridge - acceptor (A)-π bridge - donor type molecule (PCTDPP20) with planar core based on diketopyrrolopyrrole (DPP) and carbazole is synthesized by the Suzuki coupling reaction. We introduce phenyl rings to extend the π-conjugation length as a π-bridge. The HOMO and LUMO energy levels of PCTDPP20 are -5.13 and -3.57 eV, respectively. From the UV-Vis spectra, we confirm that the maximum absorption wavelgth (λmax) of the PCTDPP20 annealed film at 100°C is red-shifted about 30 nm and the absorption intensity at 600 ∼ 650 nm increase compared to that of as-spun film. And the OFET based on PCTDPP20 annealed at 100°C exhibits a highest hole mobility of 1.6 × 10-4 cm2/Vs together with a Ion/Ioff ratio of 1.0 × 104 and a Vth of 14 V. Also, the photovoltaic properties are investigated in the device structure of ITO/PEDOT:PSS/PCTDPP20:PC60BM (with different blend ratios)/Al. Among the OSCs, PCTDPP20:PCBM weight ratio of 1:0.8 and termal annealing process at 100°C for 10 min are optimum belnd ratio and temperature, respectively. This device shows the best performance with a highest PCE of 0.95% a Jsc of -2.69 mA/cm2, a Voc of 0.79 V and a fill factor of 44.5%.",

author = "Jo, {Mi Young} and Park, {Jong Hyun} and Lim, {Gyeong Eun} and Cho, {Jeong Ho} and Park, {Seong Soo} and Hong, {Seong Soo} and Kim, {Joo Hyun}",

note = "Funding Information: This work was supported by a Research Grant of Pukyong National University (2013 year). Publisher Copyright: Copyright {\textcopyright} 2014 Taylor & Francis Group, LLC.",

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doi = "10.1080/15421406.2014.933382",

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AU - Jo, Mi Young

AU - Park, Jong Hyun

AU - Lim, Gyeong Eun

AU - Cho, Jeong Ho

AU - Park, Seong Soo

AU - Hong, Seong Soo

AU - Kim, Joo Hyun

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AB - A novel donor-π bridge - acceptor (A)-π bridge - donor type molecule (PCTDPP20) with planar core based on diketopyrrolopyrrole (DPP) and carbazole is synthesized by the Suzuki coupling reaction. We introduce phenyl rings to extend the π-conjugation length as a π-bridge. The HOMO and LUMO energy levels of PCTDPP20 are -5.13 and -3.57 eV, respectively. From the UV-Vis spectra, we confirm that the maximum absorption wavelgth (λmax) of the PCTDPP20 annealed film at 100°C is red-shifted about 30 nm and the absorption intensity at 600 ∼ 650 nm increase compared to that of as-spun film. And the OFET based on PCTDPP20 annealed at 100°C exhibits a highest hole mobility of 1.6 × 10-4 cm2/Vs together with a Ion/Ioff ratio of 1.0 × 104 and a Vth of 14 V. Also, the photovoltaic properties are investigated in the device structure of ITO/PEDOT:PSS/PCTDPP20:PC60BM (with different blend ratios)/Al. Among the OSCs, PCTDPP20:PCBM weight ratio of 1:0.8 and termal annealing process at 100°C for 10 min are optimum belnd ratio and temperature, respectively. This device shows the best performance with a highest PCE of 0.95% a Jsc of -2.69 mA/cm2, a Voc of 0.79 V and a fill factor of 44.5%.

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Diketopyrrolopyrrole-based small molecule for application in solution processed organic solar cells

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

UN SDGs

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