Improvement in inverted polymer solar cells via 1-benzoyl-2-thiourea as surface modifier on sol-gel ZnO

Ren Xiu Ou, Chen Hsueh Lin, Tzung-Fang Guo, Ten-Chin Wen

Research output: Contribution to journalArticle

Abstract

Inverted polymer solar cells (PSCs) were demonstrated to improve the performance using 1-Benzoyl-2-thiourea (BT) as surface modifier on sol-gel ZnO. X-ray photoelectron spectroscopic (XPS) results showed the formation of N-Zn bonding and the reduced oxygen vacancies (V o ), indicating BT chemisorbed on V o sites of ZnO surface to passivate O defects. From ultraviolet photoelectron spectroscopic (UPS) data, the BT modified ZnO (ZnO/BT) showed decreased work function (WF) due to the interfacial dipole, enhancing the electron transportation. Besides, the phenyl group of BT provided the hydrophobic surface not only good contact with organic active layer but also a good prevention of moisture, improving the interfacial compatibility and long-term stability. Accordingly, PSCs with ZnO/BT possessed 9.16% of power conversion efficiency (PCE) higher than 8.16% of the pristine ZnO.

Original languageEnglish
Pages (from-to)131-136
Number of pages6
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume96
DOIs
Publication statusPublished - 2019 Mar 1

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Thiourea
Thioureas
Sol-gels
Photoelectrons
Oxygen vacancies
Conversion efficiency
Polymer solar cells
Moisture
X rays
Defects
Electrons

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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title = "Improvement in inverted polymer solar cells via 1-benzoyl-2-thiourea as surface modifier on sol-gel ZnO",
abstract = "Inverted polymer solar cells (PSCs) were demonstrated to improve the performance using 1-Benzoyl-2-thiourea (BT) as surface modifier on sol-gel ZnO. X-ray photoelectron spectroscopic (XPS) results showed the formation of N-Zn bonding and the reduced oxygen vacancies (V o ), indicating BT chemisorbed on V o sites of ZnO surface to passivate O defects. From ultraviolet photoelectron spectroscopic (UPS) data, the BT modified ZnO (ZnO/BT) showed decreased work function (WF) due to the interfacial dipole, enhancing the electron transportation. Besides, the phenyl group of BT provided the hydrophobic surface not only good contact with organic active layer but also a good prevention of moisture, improving the interfacial compatibility and long-term stability. Accordingly, PSCs with ZnO/BT possessed 9.16{\%} of power conversion efficiency (PCE) higher than 8.16{\%} of the pristine ZnO.",
author = "Ou, {Ren Xiu} and Lin, {Chen Hsueh} and Tzung-Fang Guo and Ten-Chin Wen",
year = "2019",
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T1 - Improvement in inverted polymer solar cells via 1-benzoyl-2-thiourea as surface modifier on sol-gel ZnO

AU - Ou, Ren Xiu

AU - Lin, Chen Hsueh

AU - Guo, Tzung-Fang

AU - Wen, Ten-Chin

PY - 2019/3/1

Y1 - 2019/3/1

N2 - Inverted polymer solar cells (PSCs) were demonstrated to improve the performance using 1-Benzoyl-2-thiourea (BT) as surface modifier on sol-gel ZnO. X-ray photoelectron spectroscopic (XPS) results showed the formation of N-Zn bonding and the reduced oxygen vacancies (V o ), indicating BT chemisorbed on V o sites of ZnO surface to passivate O defects. From ultraviolet photoelectron spectroscopic (UPS) data, the BT modified ZnO (ZnO/BT) showed decreased work function (WF) due to the interfacial dipole, enhancing the electron transportation. Besides, the phenyl group of BT provided the hydrophobic surface not only good contact with organic active layer but also a good prevention of moisture, improving the interfacial compatibility and long-term stability. Accordingly, PSCs with ZnO/BT possessed 9.16% of power conversion efficiency (PCE) higher than 8.16% of the pristine ZnO.

AB - Inverted polymer solar cells (PSCs) were demonstrated to improve the performance using 1-Benzoyl-2-thiourea (BT) as surface modifier on sol-gel ZnO. X-ray photoelectron spectroscopic (XPS) results showed the formation of N-Zn bonding and the reduced oxygen vacancies (V o ), indicating BT chemisorbed on V o sites of ZnO surface to passivate O defects. From ultraviolet photoelectron spectroscopic (UPS) data, the BT modified ZnO (ZnO/BT) showed decreased work function (WF) due to the interfacial dipole, enhancing the electron transportation. Besides, the phenyl group of BT provided the hydrophobic surface not only good contact with organic active layer but also a good prevention of moisture, improving the interfacial compatibility and long-term stability. Accordingly, PSCs with ZnO/BT possessed 9.16% of power conversion efficiency (PCE) higher than 8.16% of the pristine ZnO.

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