Highly Efficient Photoluminescence and Lasing from Hydroxide Coated Fully Inorganic Perovskite Micro/Nano‐Rods

Ying, Guanhua; Jana, Atanu; Osokin, Vitaly; Farrow, Tristan; Taylor, Robert A.; Park, Young S.

doi:10.1002/adom.202001235

Cited by 5 publications

(1 citation statement)

References 42 publications

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“…[72][73][74] Encouragingly, the polymers that participated in the crystallization can regulate the dimension and size of perovskites, endowing novel optical properties. [75][76][77][78][79][80] The improved crystalline quality, fewer defect density, suppressed ion migration, and favorable carrier transportation will reduce the energy loss for high-performance perovskite optoelectronics. [81][82][83][84] The enhanced stability, reinforced mechanical robustness, selfhealing capacity, and novel optical properties will enrich the functions of multifunctional perovskite optoelectronics.…”

Section: Introductionmentioning

confidence: 99%

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

Qin

Chen

Guo

et al. 2023

Advanced Optical Materials

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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.

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Section: Introductionmentioning

confidence: 99%

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

Qin

Chen

Guo

et al. 2023

Advanced Optical Materials

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Surface plasmon-mediated photoluminescence boost in graphene-covered CsPbBr3 quantum dots

Park,

Oleiki,

Ying

et al. 2025

Applied Surface Science

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Origin of Persisting Photoresponse of One-Year Aged Two-Dimensional Lead Halide Perovskites Stored in Air under Dark Conditions

Eledath-Changarath,

Gualdrón-Reyes,

Rodríguez-Romero

et al. 2024

ACS Appl. Mater. Interfaces

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Two-dimensional halide perovskites are promising for advanced photonic, optoelectronic, and photovoltaic applications. However, their long-term stability is still a critical factor limiting their implementation into further commercial applications. Here, we present an environmental stability analysis of BA 2 (MA) n−1 Pb n I 3n+1 (BA = C 4 H 12 N + , MA = CH 6 N + ) two-dimensional perovskites with the lowest quantum well thicknesses of n = 1 and n = 2, after 1 year of aging under ambient humidity, oxygen content, and light conditions. We observed that both crystal phases (n = 1 and 2) degraded similarly, resulting in the removal of organic components and crystal decomposition into PbI 2 , Pb oxides, and Pb hydroxides. However, we have found a significant difference between their aging under ambient light and dark conditions, affecting their degraded morphology and photoactivity. Both crystal phases exposed to ambient light aged into a morphology characterized by the formation of several pinholes and voids, accompanied by photoluminescence degradation. Samples stored under dark conditions surprisingly preserved their photoluminescence activity, which morphologically aged into microrod structures. We conclude that the observed loss of photoactivity of 2D perovskites aged under ambient light is attributed to photoaccelerated degradation processes causing faster crystal surface photo-oxidation accompanied by a creation of multiple I vacancies and hydration of the inner crystal. The retainment of photoactivity in 2D perovskites aged under dark conditions is attributed to slower surface oxidation processes into Pb salts, as confirmed by X-ray photoemission spectroscopy. The formed surface layer even allows for a layer-by-layer degradation and acts as a protection barrier against further additional loss of I atoms and the consequent hydration of the inner part of samples. We demonstrate that light is the most critical external factor accelerating 2D perovskite degradation processes in ambient air and thus affecting their long-term stability. We conclude in this work that perovskite material structural engineering together with their surface passivation or encapsulation strategical techniques applied is an essential step for their further application into long-term stable commercial devices.

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Highly Efficient Photoluminescence and Lasing from Hydroxide Coated Fully Inorganic Perovskite Micro/Nano‐Rods

Cited by 5 publications

References 42 publications

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

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

Surface plasmon-mediated photoluminescence boost in graphene-covered CsPbBr3 quantum dots

Origin of Persisting Photoresponse of One-Year Aged Two-Dimensional Lead Halide Perovskites Stored in Air under Dark Conditions

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