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Efficient Cathode Interfacial Materials Based on Triazine/Phosphine Oxide for Conventional and Inverted Organic Solar Cells

Title
Efficient Cathode Interfacial Materials Based on Triazine/Phosphine Oxide for Conventional and Inverted Organic Solar Cells
Authors
Um Kanta AryalSaripally Sudhaker ReddyChoi, JungminWoo, Chae YoungJang, SeokhoonLee, YounguKim, Bong SooLee, Hyung WooJin, Sung-Ho
DGIST Authors
Um Kanta Aryal; Saripally Sudhaker Reddy; Choi, Jungmin; Woo, Chae Young; Jang, Seokhoon; Lee, Youngu; Kim, Bong Soo; Lee, Hyung Woo; Jin, Sung-Ho
Issue Date
2020-07
Citation
Macromolecular Research, 28(8), 727-732
Type
Article
Article Type
Article
Author Keywords
cathode interfacial layerstriazinephosphine oxide unitconventionalinvertedorganic solar cellstability
Keywords
ELECTRON-TRANSPORT LAYERHIGH-PERFORMANCEPOLYMERINTERLAYERPOLYELECTROLYTES
ISSN
1598-5032
Abstract
Cathode interfacial layers (CIL) have been applied in organic solar cells (OSCs) for the enhancement of photovoltaic characteristics. Most of them are employed in either conventional organic solar cells (COSCs) or inverted organic solar cells (IOSCs) only. Herein, we have designed and synthesized two cathode interfacial materials, namely, 3-(4,6-bis(4-bromophenoxy)-1,3,5-triazin-2-yl)-2,6-difluorophenyl)diphenylphosphine oxide (Br-PO-TAZ) and 4,4′-((6-(3-(diphenylphosphoryl)-2,4-difluorophenyl)-1,3,5-triazine-2,4-diyl)bis(oxy))dibenzonitrile (CN-PO-TAZ), and utilized them as CILs for both COSCs and IOSCs. The incorporation of our new CIL layers significantly enhanced the photovoltaic performance compared to COSCs and IOSCs without the CILs. The CN-PO-TAZ exhibited a power conversion efficiency (PCE) of 8.19% for COSCs and 8.33% for IOSCs, whereas Br-PO-TAZ yielded a PCE of 8.15% for COSCs and 8.23% for IOSCs, respectively. The improved performance was attributed to the multiple favorable factors: significantly reducing leakage current, decreasing series resistance, suppressing recombination, efficient charge transport and collection. Moreover, the CIL layers helped for sustaining device stability because they served as an internal shield against humidity. © 2020, The Polymer Society of Korea and Springer.
URI
http://hdl.handle.net/20.500.11750/12598
DOI
10.1007/s13233-020-8086-0
Publisher
한국고분자학회
Related Researcher
  • Author Lee, Youngu Organic & Printed Electronics Laboratory(OPEL)
  • Research Interests OTF Solar cell; OLED; Printed Electronics; 유기박막형 태양전지
Files:
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Collection:
Department of Energy Science and EngineeringOrganic & Printed Electronics Laboratory(OPEL)1. Journal Articles


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