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Manipulation on Crystallization of Perovskite Thin-films during Blade Coating Fabrication in Air

Wednesday, 4 October 2017: 08:30
National Harbor 9 (Gaylord National Resort and Convention Center)

ABSTRACT WITHDRAWN

Organometal trihalide perovskite solar cells (PSCs) have drawn more and attention in the past few years due to the merits of low-cost preparation processes and rapidly improved power conversion efficiency (PCE) with latest certified efficiency of 22.1%.1-4 Commonly, solution processes, including one- or two-step spin-coating methods, are often employed to produce perovskite films.5, 6 Recently, the blade coating technique, with the advantages of large scale fabrication and mass production besides the well-accepted low-cost manner, has also attracted researchers’ interest for the rapid growth of perovskite films.7-8 However, nucleation and crystal growth during the film’s crystallization by blade coating are still lack of controlling, generally resulting in relatively poorer crystal quality and film uniformity. So, further strategies are required to improve the crystallization of perovskite films and ultimate device efficiencies.

In this work, different strategies were introduced during the blade-coating process to control and manipulate the crystallization of perovskite films. In depth understanding in the nucleation mechanisms and growth dynamics of films were well accomplished. As a result, the rapid growth of perovskite films with high quality and good optical performances were successfully produced. Correspondingly, efficient PSCs were correspondingly fabricated.

References

1. A. Kojima, K. Teshima, Y. Shirai and T. Miyasaka, J. Am. Chem. Soc., 2009, 131, 6050-6051.

2. M. D. McGehee, Nature Mater., 2014, 13, 845-846.

3. J. Seo, J. H. Noh and S. I. Seok, Accounts of chemical research, 2016, 49, 562-572.

4. http://www.nrel.gov/ncpv/images/efficiency_chart.jpg

5. H. S. Jung and N. G. Park, Small, 2015, 11, 10-25.

6. J.-H. Im, H.-S. Kim and N.-G. Park, APL Materials, 2014, 2, 081510.

7. J. H. Kim, S. T. Williams, N. Cho, C.-C. Chueh and A. K. Y. Jen, Adv. Energy Mater., 2015, 5, 1401229.

8. Y. Deng, E. Peng, Y. Shao, Z. Xiao, Q. Dong and J. Huang, Energy Environ. Sci., 2015, 8,1544-1550.