A Polymer Strategy toward High‐Performance Multifunctional Perovskite Optoelectronics: From Polymer Matrix to Device Applications

Abstract

Perovskites with superior photophysical properties and simple solution processing are widely applied in solar cells, light-emitting diodes, photodetectors, and lasers. However, the target of high-performance multifunctional perovskite optoelectronics is hampered by their intrinsic properties, such as the undesired crystallization rate, ease of ion migration, poor stability, and high brittleness. A perovskite-polymer matrix, including a perovskitepolymer composite and a polymer-perovskite-polymer heterostructure, is adopted to handle the above issues. This review starts with the categorized polymer addition methods and the relevant polymer distribution for a perovskite-polymer matrix. In addition, the high performance originating from the controlled crystallization, stress regulation, inhibited ion migration, defect passivation, reduced interfacial recombination, and multifunctions from the enhanced stability, mechanical robustness, self-healing ability, controllable dimension, and novel optical properties are then summarized. Meanwhile, the working mechanisms of a perovskite-polymer matrix in perovskite optoelectronics are also discussed. Finally, promising guidelines and proposals are provided to promote the commercialization of high-performance multifunctional perovskite optoelectronics.

Circularly Polarized Perovskite Luminescence in Composite Films with High Flexibility and Stability

“…Embedding perovskite nanocrystals in polymer matrix has been proven as an effective strategy for improving photoluminescence (PL) efficiency and stability. [20][21][22][23][24] Figure 1A demonstrates the preparation process of perovskite-embedded polymer films on flexible and transparent substrates. Polyethylene terephthalate (PET) and polyethylene naphthalate (PEN) are the widely used transparent substrates for flexible optoelectronic devices.…”

Electrohydrodynamic Inkjet Printing of Three-Dimensional Perovskite Nanocrystal Arrays for Full-Color Micro-LED Displays

“…However, the electric field acting on the PeNC in the colloidal ink has been proven to be able to destroy the crystalline structure of PeNCs and lead to the luminous quenching of the PeNC CCL. This electric-field-induced degradation is much severer for red CsPbBr x I (3– x ) PeNCs. − The surface passivation strategies, which utilize the formation of strong bonds between the uncoordinated ions in the perovskite (Pb 2+ ) and the groups in the additive (such as S, O, P), were adopted to improve the crystallinity and stability of the PeNCs. In the EHD printing, one should seek a balance between precisely electric driving on PeNCs and preserving the crystal structure of the PeNC lattice.…”

A sensitive self-powered perovskite photodetector via noise suppression with poly(vinylidene fluoride–trifluoroethylene) doping for defect passivation

“…[1][2][3][4][5][6][7][8][9] Especially in the field of photodetection, selfpowered perovskite photodetectors (PDs) play an important role in healthcare, bioimaging and other fields. 10,11 Among them, lead halide perovskite materials show high photocurrent and good stability, and have been widely studied in the field of photodetection. 12,13 Despite the high photocurrent of lead halide PDs, 14 it is unfortunate that perovskite polycrystalline films prepared by spin-coating have high density of defect states, leading to severe device noise, which seriously affects the device's detection sensitivity.…”

“…1–9 Especially in the field of photodetection, self-powered perovskite photodetectors (PDs) play an important role in healthcare, bioimaging and other fields. 10,11 Among them, lead halide perovskite materials show high photocurrent and good stability, and have been widely studied in the field of photodetection. 12,13…”