| 학회 |
한국재료학회 |
| 학술대회 |
2019년 가을 (10/30 ~ 11/01, 삼척 쏠비치 호텔&리조트) |
| 권호 |
25권 2호 |
| 발표분야 |
C. 에너지 재료 분과 |
| 제목 |
Understanding Effects of Precursor Solution Aging in Triple Cation Lead Perovskite |
| 초록 |
Solution process is the most widely used method to prepare perovskite absorbers for high performance solar cells due to its ease of fabrication and low capital cost. However, an insufficient level of reproducibility of the solution process is often a concern. Complex precursor solution chemistry is likely one of the main reasons for the reproducibility issue. Here we report the effects of triple cation lead mixed-halide perovskite precursor solution aging on the quality of the resulting films and the device performance. Our study revealed that precursor solution aging has a great influence on the colloidal size distribution of the solution, which then affects the phase purity of the films and device performance. We determined the optimum aging hours that led to the best device efficiency along with the highest reproducibility. Dynamic light scattering revealed the formation of micron-sized colloidal intermediates in the solution when aged longer than the optimum hours and further analysis along with X-ray diffraction measurements suggested there were two chemical origins of the large aggregates, FA-based and Cs-based complexes. |
| 저자 |
Passarut Boonmongkolras1, Daehan Kim2, Esra M. Alhabshi3, Issam Gereige4, Byungha Shin5
|
| 소속 |
1Dept. of Materials Science and Engineering, 2Korea Advanced Institute of Science and Technology, 3Dept. of Material Science and Engineering, 4Korea Advanced Institute of Technology, 5Saudi Aramco Research & Development Center |
| 키워드 |
<P>Perovskite solar cell; solution aging; colloidal chemistry</P>
|
| E-Mail |
|
