| 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
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| 소속 |
1포항공과대, 2POSTECH |
| 키워드 |
Perovskite solar cell; Hole transport layer; Double-layer; Solution-process
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| E-Mail |
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