Abstract
The photoluminescent polarization properties of organic halide perovskites are of great importance for the fundamental understanding and for device fabrication, while limited relevant work has been published. In this work we investigate the fluorescence polarization properties of the CH3NH3PbI3, CH3NH3PbI3−xClx, and CH3NH3PbBr3 perovskites which have been used in some of the highly efficient solar device to date. Time-resolved fluorescence anisotropy measurements were conducted on these perovskites fabricated by different methods, and with or without the capping hole transport layer. We demonstrate that CH3NH3PbBr3 perovskite exhibits isotropic fluorescence polarization while CH3NH3PbI3 and CH3NH3PbI3−xClx perovskites exhibit anisotropic fluorescence polarization. The composition influences significantly fluorescence anisotropy dynamics while fabrication has relatively weaker influence. The hole transport capping layer can accelerate the decay of the fluorescence anisotropy. The symmetry of perovskite structure is proposed to be the key factor to impact the fluorescence anisotropy.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
