화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터)
권호 44권 2호
발표분야 분자전자 부문위원회 II
제목 WO3 Modified Hole Transport Layer Based Highly Efficiency and Stable Planar Perovskite Solar Cells
초록 We tried to introduce inorganic hole transport material (tungsten oxide, WO3) instead of sole spiro-OMeTAD. Unfortunately, sole WO3 layer forms porous structure on the perovskite layer. However, the device employing a WO3/spiro-OMeTAD double layer achieves the highest efficiency (21.44%) in the tin oxide planar structure. The WO3/spiro-OMeTAD layer plays some roles of better hole extraction ability and faster hole mobility in the device. By lowering the quasi-Fermi energy level, the WO3 layer improves the open circuit voltage (VOC) and reducing charge recombination. Additionally, the WO3 layer acts as a scaffold layer so thus, a uniform and pinhole-free spiro-OMeTAD overlayer is formed. The resulting PSCs showed high stability under thermal and humid conditions stems from this property. Accordingly, our study suggests a highly effective engineering strategy for improving the efficiency and stability of PSCs by stacking an organic layer on an inorganic layer.
저자 최예림1, 김태완2, 김태현2, 김도현2, 민지현2, 박태호2
소속 1포항공과대, 2POSTECH
키워드 Perovskite solar cell; Hole transport layer; Double-layer; Solution-process
E-Mail