| 학회 |
한국재료학회 |
| 학술대회 |
2016년 가을 (11/16 ~ 11/18, 경주 현대호텔) |
| 권호 |
22권 2호 |
| 발표분야 |
C. 에너지 재료 분과 |
| 제목 |
Relationship between ion migration and interfacial degradation of methylammonium lead iodide perovskite solar cells under thermal conditions |
| 초록 |
Organic-inorganic hybrid perovskite solar cells (PCSs) have been extensively studied due to their outstanding performance, where a power conversion efficiency exceeding 22% has been achieved. The most commonly used perovskite solar cells consist of CH3NH3PbI3 (MAPbI3) with a hole-selective contact such as 2,2',7,7'-tetrakis(N,N-di-p-methoxyphenylamine)-9,9-spiro-bifluorene (spiro-OMeTAD) for collection of holes. From the perspective of long-term operation of solar cells, the cell performance and the constituent layers (MAPbI3, spiro-OMeTAD, etc.) may be influenced by external conditions such as temperature, light, etc. Herein, we report the effects of temperature on spiro-OMeTAD and the interface between MAPbI3 and spiro-OMeTAD in a solar cell. It was confirmed that at high temperature (85 °C), I- and CH3NH3+ (MA+) diffused into the spiro-OMeTAD layer in the CH3NH3I (MAI) form. The diffused I- ions prevented oxidation of spiro-OMeTAD, thereby degrading the electrical properties of spiro-OMeTAD. Since ion diffusion can occur during outdoors operation, the structural design of perovskite solar cells must be considered to achieve long-term stability. |
| 저자 |
김성탁1, 배수현1, 이상원1, 조경진1, 이경동1, 김현호1, 박성은1, 권구한2, 안세원2, 이헌민2, 강윤묵1, 이해석1, 김동환1
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| 소속 |
1고려대, 2LG전자 소재/생산기술원 |
| 키워드 |
<P>Solar cells; Perovskite; Long-term stability; ion migration</P>
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| E-Mail |
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