| 학회 |
한국재료학회 |
| 학술대회 |
2017년 가을 (11/15 ~ 11/17, 경주 현대호텔) |
| 권호 |
23권 2호 |
| 발표분야 |
C. 에너지 재료 분과 |
| 제목 |
EFFECTS OF POST-SYNTHESIS THERMAL CONDITIONS ON METHYL AMMONIUM LEAD IODIDE PEROVSKITE |
| 초록 |
We studied the effects of post-synthesis thermal treatments on material properties of CH3NH3PbI3 perovskite films and their photovoltaic performance. Kelvin probe force microscopy revealed the existence of a positive potential barrier at grain boundaries, which is known to be beneficial by suppressing carrier recombination. The height of the barrier increased with the annealing duration, which directly correlated with the device performance. The origin of the potential barrier appeared to be chemical inhomogeneity as revealed by Nano-Auger electron spectroscopy. Qualitatively similar temperature-dependence of current-density vs bias characteristics were observed regardless of the annealing duration, where efficiency collapsed at low temperatures due to a diverging series resistance. The freeze-out of free carries and/or a Schottky-type barrier(s) at the interface(s) is likely responsible for the diverging series resistance. |
| 저자 |
Daehan Kim1, Gee Yeong Kim2, William Jo2, Byungha Shin1
|
| 소속 |
1KAIST, 2Ewha women's Univ. |
| 키워드 |
<P>perovskite; solar cell</P>
|
| E-Mail |
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