화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.33, No.3, 191-197, May, 2009
Export Citation
CuPc: F4-TCNQ 정공 수송층이 도입된 p-i-n형 유기 박막 태양전지의 성능 특성 연구
Performance Characteristics of p-i-n Type Organic Thin-film Photovoltaic Cell with CuPc: F4-TCNQ Hole Transport Layer
박소현, 강학수, 나타라잔 센틸쿠마르, 박대원, 최영선†
  • 부산대학교 화학공학과
Sohyun Park, Hak-Su Kang, Natarajan Senthilkumar, Dae-Won Park, and Youngson Choe†
  • Department of Chemical Engineering, Pusan National University, Busan 609-735, Korea
E-mail:
초록
박막형 유기 태양전지의 성능 향상을 위하여 정공 수송층인 CuPc 층에 강한 p형 유기 반도체인 F4-TCNQ을 도핑하여 ITO/ PEDOT:PSS/CuPc: F4-TCNQ(5wt%)/CuPc:C60(blending ratio 1:1)/C60/BCP/LiF/Al의 이종 접합 구조를 가지는 p-i-n형 유기 박막형 태양전지 소자를 진공증착 장비를 이용하여 제조한 후, 유기 태양전지의 전류 밀도-전압(J-V) 특성, 단락 전류(Jsc), 개방 전압(Voc), 충진 인자(fill factor: FF), 에너지 전환 효율(ηe) 등을 측정하고 계산하여 성능 평가를 수행하였다. CuPc 층에 F4-TCNQ을 도핑함으로써 에너지 흡수 스펙트럼에서 흡수강도가 증가하였으며, F4-TCNQ가 도핑된 CuPc박막에서 F4-TCNQ 유기 분자의 분산성 향상, 박막의 표면 균일성, 주입 전류(injection currents) 향상 효과 등에 의해서 제조된 p-i-n형 유기 박막 태양전지의 성능이 향상되는것으로 확인되었다. 제조된 유기 태양전지의 에너지 전환 효율(ηe)은 0.16%로 실리콘 태양전지와 비교해서 아직도 성능 향상을 위한 많은 노력이 필요함을 보여 준다.
We have investigated the effect of strong p-type organic semiconductor F4-TCNQ-doped CuPc hole transport layer on the performance of p-i-n type bulk heterojunction photovoltaic device with ITO/PEDOT:PSS/CuPc: F4-TCNQ(5 wt%)/CuPc:C60(blending ratio 1:1)/C60/BCP/LiF/Al, architecture fabricated via vacuum deposition process, and have evaluated the J-V characteristics, shortcircuit current(Jsc), open-circuit voltage(Voc), fill factor(FF), and power conversion efficiency(ηe) of the device. By doping F4-TCNQ into CuPc hole transport layer, increased absorption intensity in absorption spectra, uniform dispersion of organic molecules in the layer, surface uniformity of the layer, and enhanced injection currents improved the current photovoltaic device with power conversion efficiency(ηe) of 0.16%, which is still low value compared to silicone solar cell indicating that many efforts should be made to improve organic photovoltaic devices.
Keywords:F4-TCNQ;p-i-n type;bulk heterojunction;photovoltaic cell;power conversion efficiency.
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