Current Photovoltaic Research

  • 제9권4호
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  • Pages.145-159
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  • 2021
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  • 2288-3274(pISSN)
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  • 2508-125X(eISSN)
한국태양광발전학회 (Korea Photovoltaic Society)
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Effective Interfacial Trap Passivation with Organic Dye Molecule to Enhance Efficiency and Light Soaking Stability in Polymer Solar Cells

  • Rasool, Shafket (Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Zhou, Haoran (Global GET-Future Laboratory & Department of Advanced Materials Chemistry, Korea University) ;
  • Vu, Doan Van (Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Haris, Muhammad (Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Song, Chang Eun (Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT)) ;
  • Kim, Hwan Kyu (Global GET-Future Laboratory & Department of Advanced Materials Chemistry, Korea University) ;
  • Shin, Won Suk (Energy Materials Research Center, Korea Research Institute of Chemical Technology (KRICT))
  • 투고 : 2021.12.07
  • 심사 : 2021.12.15
  • 발행 : 2021.12.31
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초록

Light soaking (LS) stability in polymer solar cells (PSCs) has always been a challenge to achieve due to unstable photoactive layer-electrode interface. Especially, the electron transport layer (ETL) and photoactive layer interface limits the LS stability of PSCs. Herein, we have modified the most commonly used and robust zinc oxide (ZnO) ETL-interface using an organic dye molecule and a co-adsorbent. Power conversion efficiencies have been slightly improved but when these PSCs were subjected to long term LS stability chamber, equipped with heat and humidity (45℃ and 85% relative humidity), an outstanding stability in the case of ZnO/dye+co-adsorbent ETL containing devices have been achieved. The enhanced LS stability occurred due to the suppressed interfacial defects and robust contact between the ZnO and photoactive layer. Current density as well as fill factors have been retained after LS with the modified ETL as compared to un-modified ETL, owing to their higher charge collection efficiencies which originated from higher electron mobilities. Moreover, the existence of less traps (as observed from light intensity-open circuit voltage measurements and dark currents at -2V) are also found to be one of the reasons for enhanced LS stability in the current study. We conclude that the mitigation ETL-surface traps using an organic dye with a co-adsorbent is an effective and robust approach to enhance the LS stability in PSCs.

키워드

과제정보

This work was supported by the Korean government (the Ministry of Trade, Industry & Energy, Republic of Korea) through the Human Resources Program in Energy Technology of the Korea Institute of Energy Technology Evaluation and Planning (KETEP-20204030200070) and by the Korea Research Institute of Chemical Technology (KRICT) of the Republic of Korea (No. KS2022-00).

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