Abstract
A novel ferroelectric coupling photovoltaic effect is reported to enhance the open‐circuit voltage (V OC) and the efficiency of CH3NH3PbI3 perovskite solar cells. A theoretical analysis demonstrates that this ferroelectric coupling effect can effectively promote charge extraction as well as suppress combination loss for an increased minority carrier lifetime. In this study, a ferroelectric polymer P(VDF‐TrFE) is introduced to the absorber layer in solar cells with a proper cocrystalline process. Piezoresponse force microscopy (PFM) is used to confirm that the P(VDF‐TrFE):CH3NH3PbI3 mixed thin films possess ferroelectricity, while the pure CH3NH3PbI3 films have no obvious PFM response. Additionally, with the applied external bias voltages on the ferroelectric films, the devices begin to show tunable photovoltaic performance, as expected for the polarization in the poling process. Furthermore, it is shown that through the ferroelectric coupled effect, the efficiency of the CH3NH3PbI3‐based perovskite photovoltaic devices is enhanced by about 30%, from 13.4% to 17.3%. And the open‐circuit voltages (V OC) reach 1.17 from 1.08 V, which is reported to be among the highest V OCs for CH3NH3PbI3‐based devices. It should be noted in particular that the thickness of the layer is less than 160 nm, which can be regarded as semi‐transparent.
Highlights
The power conversion efficiency (PCE) of hybrid organic–inorganic halide perovskite the open-circuit voltage (VOC) and the efficiency of CH3NH3PbI3 perovskite solar cells (PSCs) has entered the over solar cells
Piezoresponse force microscopy size to extend the lifetime of the minority (PFM) is used to confirm that the P(VDF-TrFE):CH3NH3PbI3 mixed thin films possess ferroelectricity, while the pure CH3NH3PbI3 films have no obvious piezoresponse force microscopy (PFM) response
It should be noted in particular that coupling photovoltaic effect, in which an additional internal electric field induced by the unscreened polarization charges of introduced ferroelectric materials can increase the photogenerated-carrier colthe thickness of the layer is less than 160 nm, which can be regarded as lection efficiency,[15,16] is a distinctive rousemi-transparent
Summary
The power conversion efficiency (PCE) of hybrid organic–inorganic halide perovskite the open-circuit voltage (VOC) and the efficiency of CH3NH3PbI3 perovskite solar cells (PSCs) has entered the over solar cells. Tion efficiency in ferroelectric organic photovoltaic (FE-OPV) devices.[18–22] PVDF was confirmed to be an effective additive for increasing the quality of CH3NH3PbI3 films from the perspective of increasing the crystallinity and the passivation of the grain boundary.[26,27] P(VDF-TrFE) could be a proper ferroelectric polymer for achieving the goal of enhancing PCEs in PSCs via the ferroelectric coupling photovoltaic effect.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
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.
