Lead-free molecular ferroelectric [N,N-dimethylimidazole]3Bi2I9 with narrow bandgap
W Yang, KB Chu, L Zhang, X Ding, J Sun, JZ Liu, JL Song, C Zheng, J Deng
Materials and Design | Elsevier | Published : 2020
Lead-based organic-inorganic hybrid perovskite materials are widely applied in solar cells due to their excellent optoelectronic properties. These materials usually appear ferroelectricity with the built-in electric field, which can be used to improve the power conversion efficiency (PCE) of solar cells. However, the toxicity of lead has severely hampered their applications. Hence, it is of utmost significance to explore novel organic-inorganic hybrid perovskite materials with non-toxicity, ferroelectricity, and narrow bandgap at room temperature to enhance the PCE for broad practical applications. Herein, we reported a lead-free hybrid molecular ferroelectric material, i.e. (C5N2H9)3Bi2I9, ..View full abstract
Awarded by NSFC
Awarded by 111 project 2.0
The authors gratefully acknowledge the support of NSFC (Grants Nos. 11974269, 51728203, 51471126, 21975106 and 21403232) and 111 project 2.0 (Grant No. BP0618008). JD also thanks the support of the Fundamental Research Funds for the Central Universities. JZL acknowledges the support from ARC discovery projects and HPC from National Computational Infrastructure from Australia. This work is also supported by State Key Laboratory for Mechanical Behavior of Materials.