11% Organic Photovoltaic Devices Based on PTB7-Th: PC 71 BM Photoactive Layers and Irradiation-Assisted ZnO Electron Transport Layers

Havid Aqoma, Sujung Park, Hye Yun Park, Wisnu Tantyo Hadmojo, Seung Hwan Oh, Sungho Nho, Do Hui Kim, Jeonghoon Seo, Sungmin Park, Du Yeol Ryu, Shinuk Cho, Sung Yeon Jang

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The enhancement of interfacial charge collection efficiency using buffer layers is a cost-effective way to improve the performance of organic photovoltaic devices (OPVs) because they are often universally applicable regardless of the active materials. However, the availability of high-performance buffer materials, which are solution-processable at low temperature, are limited and they often require burdensome additional surface modifications. Herein, high-performance ZnO based electron transporting layers (ETLs) for OPVs are developed with a novel g-ray-assisted solution process. Through careful formulation of the ZnO precursor and g-ray irradiation, the pre-formation of ZnO nanoparticles occurs in the precursor solutions, which enables the preparation of high quality ZnO films. The g-ray assisted ZnO (ZnO-G) films possess a remarkably low defect density compared to the conventionally prepared ZnO films. The low-defect ZnO-G films can improve charge extraction efficiency of ETL without any additional treatment. The power conversion efficiency (PCE) of the device using the ZnO-G ETLs is 11.09% with an open-circuit voltage (V OC ), short-circuit current density (J SC ), and fill factor (FF) of 0.80 V, 19.54 mA cm -2 , and 0.71, respectively, which is one of the best values among widely studied poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b′]dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl)]: [6,6]-phenyl-C 71 -butyric acid methyl ester (PTB7-Th:PC 71 BM)-based devices.

Original languageEnglish
Article number1700858
JournalAdvanced Science
Volume5
Issue number7
DOIs
Publication statusPublished - 2018 Jul

Fingerprint

Electron Transport
Irradiation
Equipment and Supplies
rays
irradiation
Electrons
Buffers
electrons
buffers
Butyric acid
Butyric Acid
butyric acid
Defect density
defects
Thiophene
Open circuit voltage
Motion Pictures
Buffer layers
short circuit currents
thiophenes

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Chemical Engineering(all)
  • Materials Science(all)
  • Biochemistry, Genetics and Molecular Biology (miscellaneous)
  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Aqoma, Havid ; Park, Sujung ; Park, Hye Yun ; Hadmojo, Wisnu Tantyo ; Oh, Seung Hwan ; Nho, Sungho ; Kim, Do Hui ; Seo, Jeonghoon ; Park, Sungmin ; Ryu, Du Yeol ; Cho, Shinuk ; Jang, Sung Yeon. / 11% Organic Photovoltaic Devices Based on PTB7-Th : PC 71 BM Photoactive Layers and Irradiation-Assisted ZnO Electron Transport Layers. In: Advanced Science. 2018 ; Vol. 5, No. 7.
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title = "11{\%} Organic Photovoltaic Devices Based on PTB7-Th: PC 71 BM Photoactive Layers and Irradiation-Assisted ZnO Electron Transport Layers",
abstract = "The enhancement of interfacial charge collection efficiency using buffer layers is a cost-effective way to improve the performance of organic photovoltaic devices (OPVs) because they are often universally applicable regardless of the active materials. However, the availability of high-performance buffer materials, which are solution-processable at low temperature, are limited and they often require burdensome additional surface modifications. Herein, high-performance ZnO based electron transporting layers (ETLs) for OPVs are developed with a novel g-ray-assisted solution process. Through careful formulation of the ZnO precursor and g-ray irradiation, the pre-formation of ZnO nanoparticles occurs in the precursor solutions, which enables the preparation of high quality ZnO films. The g-ray assisted ZnO (ZnO-G) films possess a remarkably low defect density compared to the conventionally prepared ZnO films. The low-defect ZnO-G films can improve charge extraction efficiency of ETL without any additional treatment. The power conversion efficiency (PCE) of the device using the ZnO-G ETLs is 11.09{\%} with an open-circuit voltage (V OC ), short-circuit current density (J SC ), and fill factor (FF) of 0.80 V, 19.54 mA cm -2 , and 0.71, respectively, which is one of the best values among widely studied poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b′]dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-)-2-carboxylate-2-6-diyl)]: [6,6]-phenyl-C 71 -butyric acid methyl ester (PTB7-Th:PC 71 BM)-based devices.",
author = "Havid Aqoma and Sujung Park and Park, {Hye Yun} and Hadmojo, {Wisnu Tantyo} and Oh, {Seung Hwan} and Sungho Nho and Kim, {Do Hui} and Jeonghoon Seo and Sungmin Park and Ryu, {Du Yeol} and Shinuk Cho and Jang, {Sung Yeon}",
year = "2018",
month = "7",
doi = "10.1002/advs.201700858",
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Aqoma, H, Park, S, Park, HY, Hadmojo, WT, Oh, SH, Nho, S, Kim, DH, Seo, J, Park, S, Ryu, DY, Cho, S & Jang, SY 2018, '11% Organic Photovoltaic Devices Based on PTB7-Th: PC 71 BM Photoactive Layers and Irradiation-Assisted ZnO Electron Transport Layers', Advanced Science, vol. 5, no. 7, 1700858. https://doi.org/10.1002/advs.201700858

11% Organic Photovoltaic Devices Based on PTB7-Th : PC 71 BM Photoactive Layers and Irradiation-Assisted ZnO Electron Transport Layers. / Aqoma, Havid; Park, Sujung; Park, Hye Yun; Hadmojo, Wisnu Tantyo; Oh, Seung Hwan; Nho, Sungho; Kim, Do Hui; Seo, Jeonghoon; Park, Sungmin; Ryu, Du Yeol; Cho, Shinuk; Jang, Sung Yeon.

In: Advanced Science, Vol. 5, No. 7, 1700858, 07.2018.

Research output: Contribution to journalArticle

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T1 - 11% Organic Photovoltaic Devices Based on PTB7-Th

T2 - PC 71 BM Photoactive Layers and Irradiation-Assisted ZnO Electron Transport Layers

AU - Aqoma, Havid

AU - Park, Sujung

AU - Park, Hye Yun

AU - Hadmojo, Wisnu Tantyo

AU - Oh, Seung Hwan

AU - Nho, Sungho

AU - Kim, Do Hui

AU - Seo, Jeonghoon

AU - Park, Sungmin

AU - Ryu, Du Yeol

AU - Cho, Shinuk

AU - Jang, Sung Yeon

PY - 2018/7

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