Development of New Materials for Highly Efficient Perovskite Solar Cells
Kai Wang a, Liguo Gao b, Tingli MA
a Kyushu Insititute of Technology, 2-4 Hibikino, Wakamatsu-ku, Kitakyusyu, 808
b Dalian University of Technology, Dalian, 116024,, China
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
Proceedings of International Conference Asia-Pacific Hybrid and Organic Photovoltaics (AP-HOPV17)
Yokohama-shi, Japan, 2017 February 2nd - 4th
Organizers: Tsutomu Miyasaka and Iván Mora-Seró
Oral, Tingli MA, presentation 138
Publication date: 7th November 2016

Perovskite solar cells (PSCs) have attracted much attention due to their high-energy conversion efficiency and low production cost. However, the problems of stability and toxicity for PSCs are still unresolved. Our group carried out the studies on the PSCs from the fundamentals to their devices, including development of a series of materials for compact layer, active layer, hole transfer layer, as well as back electrodes.

Here, we present several kinds of inorganic ESLs based on amorphous WOx and its composite with NbOx, as well as SnO2 and WS2 for the PSCs. It is revealed that the composite of NbOx and WOx can improve the charge injection, transmission, and the donor density. The energy band structure and the depletion layer at the interface of ITO/ESL can also be modified. As a result, a 15.65% of PCE for the planar flexible PSC has been obtained based on the composite ESLs of NbOx and WOx fabricated at low temperature. Our recent results of Pb-free perovskites will also be presented.

References:

[1] J. T.-W. Wang, J. M. Ball, E. M. Barea, A. Abate, J. A. Alexander-Webber, J. Huang, M. Saliba, I. Mora-Sero, J. Bisquert, H. J. Snaith, R. J. Nicholas, Nano Lett. 2014, 14, 724.[2] K. Wang, Y. Shi, Q. Dong, Y. Li, S. Wang, X. Yu, M. Wu, T. Ma, J. Phys. Chem. Lett. 2015, 6, 755.

[2] K. Wang, Y. Shi, Y. Li, S. Wang, X. Yu, M. Wu, T. Ma, Adv. Mater 2016. 28, 1891–1897 



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