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Home NEWS Science News Technology

Uncovering Interaction Sites for Emission Boost in Non-Hydrogen-Bonded Hybrid Perovskite Through Pressure Engineering

Bioengineer by Bioengineer
March 13, 2025
in Technology
Reading Time: 4 mins read
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Uncovering Interaction Sites for Emission Boost in Non-Hydrogen-Bonded Hybrid Perovskite Through Pressure Engineering
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A groundbreaking study conducted by a team from Jilin University has introduced an innovative strategy to understand the interactions between organic and inorganic components in non-hydrogen-bonded hybrid metal perovskites. This research offers significant insights that could direct the design of materials with desired optical properties. By employing pressure engineering, scientists have begun to unravel the complexities of organic-inorganic interaction sites, which have been largely overlooked in previous studies, thus illuminating a new path for future material enhancements.

The exploration of organic and inorganic interactions in hybrid perovskites has historically centered on the well-trodden territory of hydrogen bonding. Guanjun Xiao, the lead researcher of the study, pointed out that past investigations mainly focused on how these hydrogen interactions influence the material’s photophysical properties. However, the absence of dedicated exploration into non-hydrogen-bonded hybrid perovskites has constituted a significant hurdle in the precise design of materials tailored for specific optical characteristics. This new study stands as a pivotal point in expanding the understanding of interaction mechanisms that play a critical role in the performance of these materials.

To probe this uncharted territory, Xiao and his team deployed high-pressure engineering as a means to investigate the specific sites in non-hydrogen-bonded hybrid perovskite, specifically the compound known as (DBU)PbBr3. Through the application of high pressure, the researchers were able to elucidate that the spatial arrangement of bromine (Br) and nitrogen (N) atomic pairs significantly shapes the organic-inorganic interactions present within the material. This important finding is expected to guide the design and development of next-generation materials by enabling the optimization of their optical properties.

This study was recently published on September 16 in the journal “Research,” which is the inaugural Science Partner Journal launched by the American Association for the Advancement of Science (AAAS) in collaboration with the China Association for Science and Technology (CAST). The publication underscores the shift towards collaborative research endeavors that harness diverse expertise to tackle the pressing scientific challenges of our time. Guanjun Xiao, serving as a professor in the State Key Laboratory of Superhard Materials at Jilin University, spearheaded this significant research effort.

In the course of their research, the Jilin team successfully synthesized microrods of (DBU)PbBr3 utilizing the hot injection method. This state-of-the-art synthetic approach laid the groundwork for systematic investigations into the material’s high-pressure optical and structural properties. Intriguingly, as pressure was applied, the researchers detected a remarkable enhancement in the material’s emission alongside a blue shift, culminating in an impressive photoluminescence quantum yield of 86.6% at 5.0 GPa. This discovery suggests that the photophysical characteristics of the material can be remarkably improved through the strategic manipulation of pressure.

Further elucidating the material’s behavior, the team conducted photoluminescence lifetime measurements that indicated a suppression of non-radiative recombination processes under high pressure conditions. This suppression is critical as it enhances the efficiency of light emission, thereby showcasing the potential of pressure engineering as a means to elevate the performance of photonic materials. The researchers also observed an anomalously enhanced Raman mode corresponding with the pressure range in which emission enhancement occurred, suggesting a compelling link between these two phenomena.

Through meticulous analysis, the researchers delved deep into the origin of the Raman mode and identified it as being associated with the interactions between the organic and inorganic components, particularly related to N-Br interactions. This understanding of the relationship between these interactions paves the way for further investigations and optimizations of hybrid perovskite materials.

Additionally, the study explored the structural evolution of (DBU)PbBr3 under varying pressures, complemented by first principles calculations. These calculations revealed that the primary determinants affecting interaction strength were the spatial configurations of nitrogen and bromine atoms—including their distances and dihedral angles. Importantly, the research identified an isostructural phase transition occurring at 5.5 GPa, a pivotal moment that altered the evolutionary path of the material.

Xiao articulated that the transition indicated a significant turning point where the interaction strength between organic and inorganic components initially escalated with increased pressure, only to eventually decline. This phenomenon aligned with the observed evolution of the material’s optical properties, underscoring the intricate balance between structural attributes and optical performance within non-hydrogen-bonded hybrid perovskites.

By bridging these vital gaps in knowledge regarding organic-inorganic interactions in hybrid halides, this research offers invaluable guidance for the future design of materials that are specifically tailored for their intended optical functionalities. In a landscape increasingly dominated by the quest for advanced materials with precise properties, this study sets the stage for subsequent innovations in the field of hybrid perovskites.

Thus, the findings presented by Xiao and his team not only enhance our scientific understanding but also promise to influence the trajectory of materials science moving forward. The interplay between high pressure and material behavior highlights a powerful tool at researchers’ disposal—a tool that could facilitate unprecedented advances in optical material design.

Subject of Research: Non-hydrogen-bonded hybrid metal perovskites
Article Title: Identifying Organic–Inorganic Interaction Sites Toward Emission Enhancement in Non-Hydrogen-Bonded Hybrid Perovskite via Pressure Engineering
News Publication Date: 16-Sep-2024
Web References: Research DOI
References: Not applicable
Image Credits: Not applicable

Keywords

organic-inorganic interactions, hybrid perovskites, pressure engineering, photoluminescence, material design, Jilin University, Guanjun Xiao, structural properties, optical properties, Raman mode, (DBU)PbBr3

Tags: advancements in perovskite researchcomplexities of hybrid materialsenhancing material performance through engineeringinnovative strategies in material scienceinteractions in metal perovskitesJilin University materials studymaterial design for optical characteristicsnon-hydrogen-bonded hybrid perovskitesoptical properties of perovskitesorganic-inorganic interaction sitesphotophysical properties of hybrid perovskitespressure engineering in materials science

Tags: material design for optical propertiesnon-hydrogen-bonded hybrid perovskitesorganic-inorganic interaction sitesphotoluminescence enhancementpressure engineering
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