Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 155, Issue -, Pages 331-340Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2016.06.037
Keywords
Lead iodide complex; Controlled crystallization; Perovskite solar cell
Funding
- Major State Basic Research Development Program [2014CB643503]
- National Natural Science Foundation of China [91233114, 51261130582, 51222302]
- Fundamental Research Funds for Central Universities of China [2015FZA4008]
- National Science Foundation [2015M580512]
Ask authors/readers for more resources
Lead halide complexes are efficient precursors to obtain high quality perovskite films and high performance solar cells. However, how the lead halide complex affects the crystallization kinetics and thus the film quality of perovskite has not been systematically studied. Herein, two PbI2(X) complexes with different coordination strength of ligand X in complexation with PbI2 (PbI2(DMF) and PbI2(DMSO)) are synthesized. The correlation between the morphology, evolution of the perovskite formation, defects state, carrier lifetime and the subsequent photovoltaic performance are investigated in details via a two-step coating method with various PbI2(X) complexes. We find that PbI2(DMSO) derived perovskite film shows larger grains and vertically oriented grain boundaries as well as enhanced photoluminescence intensity and longer carrier lifetime. As a result, highly efficient inverted planar perovskite solar cells with a power conversion efficiency up to 17.0% are achieved from PbI2(DMSO) complex under 1 sun illumination. This research could open up a new pathway to further improve the performance of perovskite solar cells through the control of perovskite crystallization kinetics by choosing proper PbI2(X) complex precursors. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available