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%.
| Original language | English |
|---|---|
| Pages (from-to) | 111-119 |
| Number of pages | 9 |
| Journal | Molecular Crystals and Liquid Crystals |
| Volume | 598 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2014 Jul 24 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics
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Diketopyrrolopyrrole-based small molecule for application in solution processed organic solar cells. / Jo, Mi Young; Park, Jong Hyun; Lim, Gyeong Eun; Cho, Jeong Ho; Park, Seong Soo; Hong, Seong Soo; Kim, Joo Hyun.
In: Molecular Crystals and Liquid Crystals, Vol. 598, No. 1, 24.07.2014, p. 111-119.Research output: Contribution to journal › Article
TY - JOUR
T1 - Diketopyrrolopyrrole-based small molecule for application in solution processed organic solar cells
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
PY - 2014/7/24
Y1 - 2014/7/24
N2 - 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%.
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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U2 - 10.1080/15421406.2014.933382
DO - 10.1080/15421406.2014.933382
M3 - Article
AN - SCOPUS:84945237007
VL - 598
SP - 111
EP - 119
JO - Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals
SN - 1542-1406
IS - 1
ER -