Effects of Mn,Cl co-doping on the structure and photoluminescence properties of novel walnut-shape MAPb0.95Mn0.05I3-xClx films |
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| Authors: | Xin Guan Xin Ge Ce Wang Fengyou Wang Xiaoyan Liu Jian Cao Lin Fan Lili Yang |
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| Affiliation: | 1. Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Changchun 130013, China;2. National Demonstration Center for Experimental Physics Education, Jilin Normal University, Siping 136000, China;3. College of Chemistry, Jilin Normal University, Siping 136000, China |
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| Abstract: | The novel walnut shape MAPb0.95Mn0.05I3-xClx film was successfully synthesized by a one-step method followed by chlorobenzene anti-solvent treatment. The bandgap energy and PL intensity of perovskite film can be effectively tuned by Mn and Cl co-doping. The enlarged bandgap energy is mainly attributed to the synergistic effect of strengthened Pb-I interaction, Cl incorporation and smaller electronegativity of Mn dopants. The stronger coupling between the Mn d- and Pb p-bands, extended carriers diffusion length and more emitting defect-associated states caused by Mn and Cl co-doping are the main reasons for the enhancing PL intensity of MAPb0.95Mn0.05I3-xClx walnut shape film. This work not only helps to in-depth understand the correlation between co-doping elements and optical properties of nanostructured perovskite films, but also provides important strategy for future designing the lower-toxic nanostructured perovskite materials with enhanced electrical and optical properties. |
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| Keywords: | Doped organometal perovskite film Optical properties, enlarged bandgap energy Enhanced PL intensity |
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