Post annealing effect of flexible polymer solar cells to improve their electrical properties

Su Cheol Gong, Seong Kyu Jang, Sang Ouk Ryu, Hyeongtag Jeon, Hyung-Ho Park, Ho Jung Chang

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Flexible polymer solar cells with an ITO/PEDOT/P3HT:PCBM/Al structure were fabricated using regioregular poly(3-hexylthiophene) (P3TH) polymer:(6,6)-phenyl C61-butyric acid methyl ester (PCBM) fullerene polymer as the photovoltaic (PV) bulk hetero-junction layer. The P3HT and PCBM used as the electron donor and electron acceptor materials were spin cast on indium tin oxide (ITO) coated polyethylene naphthalate (PEN) substrates. The optimum mixing concentration ratio of the P3HT:PCBM PV layer was found to be 4:4 wt.%, at which the maximum short circuit current density (JSC), open circuit voltage (V OC), fill factor (FF) and power conversion efficiency (PCE) values were about 3.8 mA/cm2, 427 mV, 36.6% and 0.66%, respectively. To investigate the effects of the post annealing treatment, the as-prepared flexible polymer solar cells were post annealed at temperatures ranging from 150 °C to 180 °C for 5 min. The JSC and VOC values increased with increasing post annealing temperature from 150 °C to 170 °C, which may be due to the improvement of the light absorption coefficient of P3HT and improved ohmic contact between the PV layer and Al electrode film. The maximum JSC, VOC, FF and PCE values of the flexible polymer solar cell, which was post annealed at 170 °C for 5 min, were found to be about 4.3 mA/cm2, 616 mV, 32.6% and 0.86%, respectively.

Original languageEnglish
JournalCurrent Applied Physics
Volume10
Issue number4 SUPPL.
DOIs
Publication statusPublished - 2010 Nov 1

Fingerprint

Butyric acid
Butyric Acid
butyric acid
Esters
Electric properties
solar cells
electrical properties
Annealing
esters
Volatile organic compounds
Conversion efficiency
annealing
Polymers
polymers
Tin oxides
Indium
volatile organic compounds
Fullerenes
Electrons
Ohmic contacts

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Gong, Su Cheol ; Jang, Seong Kyu ; Ryu, Sang Ouk ; Jeon, Hyeongtag ; Park, Hyung-Ho ; Chang, Ho Jung. / Post annealing effect of flexible polymer solar cells to improve their electrical properties. In: Current Applied Physics. 2010 ; Vol. 10, No. 4 SUPPL.
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Post annealing effect of flexible polymer solar cells to improve their electrical properties. / Gong, Su Cheol; Jang, Seong Kyu; Ryu, Sang Ouk; Jeon, Hyeongtag; Park, Hyung-Ho; Chang, Ho Jung.

In: Current Applied Physics, Vol. 10, No. 4 SUPPL., 01.11.2010.

Research output: Contribution to journalArticle

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T1 - Post annealing effect of flexible polymer solar cells to improve their electrical properties

AU - Gong, Su Cheol

AU - Jang, Seong Kyu

AU - Ryu, Sang Ouk

AU - Jeon, Hyeongtag

AU - Park, Hyung-Ho

AU - Chang, Ho Jung

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AB - Flexible polymer solar cells with an ITO/PEDOT/P3HT:PCBM/Al structure were fabricated using regioregular poly(3-hexylthiophene) (P3TH) polymer:(6,6)-phenyl C61-butyric acid methyl ester (PCBM) fullerene polymer as the photovoltaic (PV) bulk hetero-junction layer. The P3HT and PCBM used as the electron donor and electron acceptor materials were spin cast on indium tin oxide (ITO) coated polyethylene naphthalate (PEN) substrates. The optimum mixing concentration ratio of the P3HT:PCBM PV layer was found to be 4:4 wt.%, at which the maximum short circuit current density (JSC), open circuit voltage (V OC), fill factor (FF) and power conversion efficiency (PCE) values were about 3.8 mA/cm2, 427 mV, 36.6% and 0.66%, respectively. To investigate the effects of the post annealing treatment, the as-prepared flexible polymer solar cells were post annealed at temperatures ranging from 150 °C to 180 °C for 5 min. The JSC and VOC values increased with increasing post annealing temperature from 150 °C to 170 °C, which may be due to the improvement of the light absorption coefficient of P3HT and improved ohmic contact between the PV layer and Al electrode film. The maximum JSC, VOC, FF and PCE values of the flexible polymer solar cell, which was post annealed at 170 °C for 5 min, were found to be about 4.3 mA/cm2, 616 mV, 32.6% and 0.86%, respectively.

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