PEDOT:PSS 정공 수송층에 금 나노입자를 첨가한 유기태양전지의 제작 및 특성 연구 = Fabrication and Characterization of Organic Solar Cells with Gold Nanoparticles in PEDOT:PSS Hole Transport Layer

국문 초록 (Abstract)

본 논문은 캐리어의 이동도 및 전도도를 개선하고, 흡수된 빛의 이동 경로를 증가시켜 광흡수도를 높이기 위하여 정공 수송층 재료에 금 나노입자를 첨가하여 유기태양전지를 제작하였다. 광활성층으로는 P3HT와 PCBM의 bulk-heterojunction 구조를 사용하였다. 유기태양전지에서 금 나노입자를 첨가한 정공 수송층의 효과를 관찰하기 위하여 금 나노입자의 첨가량(0, 0.5, 1.0 wt% Au)과 열처리온도(상온, $110^{\circ}C$, $130^{\circ}C$, $150^{\circ}C$)에 따른 광학적 전기적 특성을 조사하였다. 최대전력변환효율을 갖는 유기태양전지는 0.5 wt% 금 나노입자 첨가한 소자와 $130^{\circ}C$에서 열처리한 소자에서 관찰되었다. 이때 유기태양전지의 전기적 특성은 금 나노입자를 0.5 wt% 첨가한 경우, 단락전류밀도, 곡선인자 및 전력변환효율은 각각 10.2 $mA/cm^2$, 55.8% 및 3.1%로 나타났으며, $130^{\circ}C$에서 열처리한 경우, 12.0 $mA/cm^2$의 단락전류밀도와 64.2%의 곡선인자를 가지며, 4.0%의 전력변환효율이 관찰되었다.

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