화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.28, No.8, 727-732, July, 2020
DOI10.1007/s13233-020-8086-0  Export Citation
Efficient Cathode Interfacial Materials Based on Triazine/Phosphine Oxide for Conventional and Inverted Organic Solar Cells
Um Kanta Aryal, Saripally Sudhaker Reddy, Jungmin Choi, Chae Young Woo1, Seokhoon Jang2, Youngu Lee2, †, Bong Soo Kim3, †, Hyung Woo Lee1, †, and Sung-Ho Jin†
  • Department of Chemistry Education, Graduate Department of Chemical Materials, Institute for Plastic Information and Energy Materials, Pusan National University, Busan 46241, Korea
  • 1Department of Nano Fusion Technology, Department of Nanoenergy Engineering, Pusan National University, Busan 46241, Korea
  • 2Department of Energy Science & Engineering, DGIST, 333, Daegu 42988, Korea
  • 3Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Korea
E-mail:, , ,
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.
Keywords:cathode interfacial layers;triazine/phosphine oxide unit;conventional/inverted;organic solar cell;stability
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